* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  height: 100dvh;
  overscroll-behavior-y: none;
}

body {
  font-family: var(--font-ui);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  font-weight: 400;
  
  /* Disable text selection everywhere except inputs and AI responses */
  user-select: none;
  -webkit-user-select: none;
  
  overflow: hidden; /* Prevent body scroll, handle scrolling in containers */
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Allow text selection in specific areas */
.selectable-text {
  user-select: text;
  -webkit-user-select: text;
}

/* --- Hide Scrollbars Globally (for non-Android browsers) --- */
*::-webkit-scrollbar,
::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
  background: transparent !important;
}
* {
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}

/* =========================================
   Fluid Dark Background Animation
   ========================================= */
body[data-bg-style="fluid-dark"] {
  background-color: #000000 !important; 
  background-image: 
    radial-gradient(circle at 85% 15%, rgba(80, 30, 20, 0.7) 0%, rgba(55, 20, 15, 0.4) 25%, transparent 45%),
    radial-gradient(circle at 20% 85%, rgba(65, 35, 25, 0.6) 0%, rgba(40, 20, 15, 0.3) 30%, transparent 55%),
    radial-gradient(circle at 10% 30%, rgba(20, 20, 25, 0.4) 0%, rgba(15, 15, 20, 0.15) 20%, transparent 35%) !important;
  background-size: 150% 150% !important;
  animation: fluid-bg-move 35s ease-in-out infinite alternate !important;
}

@keyframes fluid-bg-move {
  0% { background-position: 0% 0%; }
  50% { background-position: 100% 100%; }
  100% { background-position: 0% 100%; }
}

body[data-bg-style="fluid-dark"] .aurora-background,
body[data-bg-style="fluid-dark"] #ambient-light,
body[data-bg-style="fluid-dark"]::before,
body[data-bg-style="fluid-dark"]::after {
  display: none !important;
  animation: none !important;
}

/* =========================================
   Aurora Background Animation
   ========================================= */
.aurora-background {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--bg-color);
  overflow: hidden;
}

.aurora-background::before,
.aurora-background::after,
.aurora-blob-3 {
  content: '';
  position: absolute;
  width: 120vw;
  height: 120vh;
  border-radius: 50%;
  opacity: 0.4;
  animation: aurora-drift 15s ease-in-out infinite alternate;
  will-change: transform;
}

body::before, body::after {
  content: "";
  position: fixed;
  top: -50%; left: -50%; width: 200%; height: 200%;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 50% 50%, rgba(100, 50, 200, 0.03) 0%, transparent 60%);
  animation: aurora-shift 20s infinite alternate linear;
  will-change: transform;
}
body::after {
  background: radial-gradient(circle at 30% 70%, rgba(50, 100, 200, 0.02) 0%, transparent 50%);
  animation: aurora-shift 25s infinite alternate-reverse linear;
}

body.sidebar-open::before, body.sidebar-open::after {
  animation-play-state: paused;
}

.aurora-background::before {
  /* Softer radial gradient replaces the need for filter: blur() */
  background: radial-gradient(circle at center, var(--aurora-purple) 0%, transparent 60%);
  top: -20%;
  left: -10%;
  animation-delay: 0s;
}

.aurora-background::after {
  background: radial-gradient(circle at center, var(--aurora-teal) 0%, transparent 60%);
  bottom: -30%;
  right: -20%;
  animation-delay: -5s;
}

.aurora-blob-3 {
  background: radial-gradient(circle at center, var(--aurora-blue) 0%, transparent 60%);
  top: 10%;
  right: -10%;
  animation-delay: -10s;
}

@keyframes aurora-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  33%  { transform: translate3d(8%, -10%, 0) scale(1.1); }
  66%  { transform: translate3d(-5%, 8%, 0) scale(0.9); }
  100% { transform: translate3d(10%, -5%, 0) scale(1.05); }
}

/* =========================================
   Core Layout Components
   ========================================= */
#app {
  display: flex;
  flex-direction: column;
  height: 100%; /* Fix iOS Safari dynamic viewport resizing jumping bug */
  padding-top: var(--safe-area-top);
  padding-bottom: var(--safe-area-bottom);
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
  position: relative;
}


/* Ambient light effect for chat view */
#ambient-light {
  position: fixed;
  top: -20vh;
  right: -20vw;
  width: 140vw;
  height: 140vh;
  pointer-events: none;
  z-index: 0;
  background: conic-gradient(from 180deg at calc(100% - 10vw) 10vh, transparent 15deg, rgba(255, 255, 255, 0.10) 35deg, rgba(137, 207, 240, 0.05) 65deg, transparent 85deg);
  opacity: 1 !important;
}

.view-container {
  flex: 1;
  min-height: 0; /* Critical for nested flex overflow on Android WebView */
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
  scroll-behavior: smooth;
  padding-bottom: 140px; /* Space for bottom bar globally */
}

body.in-chat-view .view-container {
  padding-bottom: 0px !important; /* Managed by #chat-messages instead to prevent double scrolling */
}

.chat-overlay-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  padding: 16px 20px 16px 20px;
  margin-bottom: -16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  pointer-events: none;
}

/* Bottom Tab Bar */
/* =========================================
   Bottom Navigation & Tabs
   ========================================= */
.bottom-tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-around;
  align-items: flex-end;
  padding: 60px 4px calc(8px + var(--safe-area-bottom));
  background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.2) 20%, rgba(0,0,0,0.6) 40%, rgba(0,0,0,0.9) 60%, rgba(0,0,0,1) 80%);
  border: none;
  box-shadow: none;
  pointer-events: none;
}

.bottom-tab-bar > * {
  pointer-events: auto;
}

.bottom-tab-bar::before {
  display: none;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #777; /* Unselected color matching reference */
  gap: 4px;
  flex: 1;
  cursor: pointer;
  transition: color 0.4s var(--ios-spring), transform 0.4s var(--ios-spring-bouncy), opacity 0.4s var(--ios-spring);
  will-change: transform;
}

.tab-item:active {
  transform: scale(0.85);
  opacity: 0.7;
}

.tab-item svg {
  width: 44px;
  height: 44px;
  fill: currentColor;
  transition: transform 0.4s var(--ios-spring-bouncy), fill 0.4s var(--ios-spring);
}

.tab-item.active {
  color: #d49afb; /* Purple glow text */
}

.tab-item.active svg {
  fill: url(#active-icon-gradient);
  filter: drop-shadow(0 2px 8px rgba(182, 120, 242, 0.5));
  transform: translateY(-2px);
}

/* Apple Capsule Input Area */
.input-capsule-container {
  position: fixed;
  bottom: calc(76px + var(--safe-area-bottom));
  left: 8px;
  right: 8px;
  z-index: 90;
}

.input-capsule {
  display: flex;
  align-items: center;
  background: var(--chat-user-bg);
  border-radius: 28px;
  padding: 8px;
  min-height: 56px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.input-capsule textarea {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 18px;
  resize: none;
  max-height: 120px;
  padding: 8px;
  outline: none;
}

.input-capsule textarea::placeholder {
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: transparent;
  border: none;
  border-radius: 50%;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ios-spring-bouncy), background-color 0.4s var(--ios-spring), opacity 0.4s var(--ios-spring), box-shadow 0.4s var(--ios-spring);
  will-change: transform;
}
.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}
.icon-btn:active {
  transform: scale(0.85);
  opacity: 0.7;
}

.icon-btn.primary {
  background: var(--primary-accent);
  color: #fff;
}

/* =========================================
   Siri Style Input Glow
   ========================================= */
.siri-capsule {
  position: relative;
  background: rgba(10, 10, 15, 0.25) !important;
  border: 1px solid rgba(255, 255, 255, 0.05) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 0 20px rgba(255, 255, 255, 0.03) !important;
  border-radius: 32px !important;
  overflow: hidden;
  backdrop-filter: blur(30px) saturate(150%);
  -webkit-backdrop-filter: blur(30px) saturate(150%);
}

@keyframes siri-breathe {
  0% { background-position: 0% 50%; opacity: 0.4; }
  50% { background-position: 100% 50%; opacity: 0.7; }
  100% { background-position: 0% 50%; opacity: 0.4; }
}

.siri-capsule::before {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 10%;
  right: 10%;
  height: 12px;
  background: linear-gradient(90deg, transparent 0%, rgba(50, 120, 255, 0.8) 20%, rgba(200, 50, 255, 0.8) 50%, rgba(255, 180, 50, 0.8) 80%, transparent 100%);
  background-size: 200% 200%;
  filter: blur(10px);
  opacity: 0.5;
  z-index: 0;
  border-radius: 50%;
  pointer-events: none;
  animation: siri-breathe 8s ease-in-out infinite;
}

.siri-capsule > * {
  position: relative;
  z-index: 1; /* Keep inputs above the glow */
}

.input-capsule textarea {
  background: transparent !important;
  color: white !important;
}

/* =========================================
   Chat Specific Styles
   ========================================= */
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

@keyframes message-slide-up {
  0% { opacity: 0; transform: translateY(20px) scale(0.95); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes message-drop-fly {
  0% {
    opacity: 0;
    transform: translate3d(var(--start-x, -100px), var(--start-y, 200px), 0) scale(0.15, 0.15);
    border-radius: 50%;
    color: transparent;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.4));
  }
  30% {
    opacity: 1;
    transform: translate3d(calc(var(--start-x, -100px) * 0.4), calc(var(--start-y, 200px) * 0.7), 0) scale(0.3, 0.3);
    border-radius: 50%;
    color: transparent;
    filter: drop-shadow(0 0 5px rgba(255,255,255,0.2));
  }
  70% {
    transform: translate3d(0px, -10px, 0) scale(1.02, 0.98);
    border-radius: 20px 20px 4px 20px;
    color: rgba(255,255,255,0.5);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1, 1);
    border-radius: 20px 20px 4px 20px;
    color: var(--text-primary);
    filter: drop-shadow(0 0 0 transparent);
  }
}

.message-drop-anim {
  animation: message-drop-fly 1.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  will-change: transform, opacity, border-radius, color, filter;
  transform-origin: bottom right;
}

.chat-bubble-user {
  background: rgba(40, 40, 45, 0.6);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 15px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.05);
  padding: 12px 16px;
  border-radius: 20px 20px 4px 20px;
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.5;
  word-wrap: break-word;
}

.chat-bubble-ai {
  background: transparent;
  padding: 12px 16px 12px 4px; /* Slight left padding to breathe */
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.6;
  word-wrap: break-word;
  animation: message-slide-up 0.5s var(--ios-spring-bouncy) forwards;
  will-change: transform, opacity;
}

.dot-bounce {
  display: inline-block;
  animation: bounce 1.4s infinite ease-in-out both;
}

.markdown-body p { margin-bottom: 8px; }

.chat-bubble-ai > .markdown-body > p:first-of-type, 
.chat-bubble-ai.markdown-body > p:first-of-type {
  font-size: 1.05em;
  color: rgba(255, 255, 255, 0.98);
  margin-bottom: 16px;
  line-height: 1.6;
}

.markdown-body strong { font-weight: 600; color: #fff; }

.tts-word {
  transition: background-color 0.1s ease, color 0.1s ease;
}
.tts-word.active {
  background-color: rgba(193, 131, 240, 0.4) !important;
  color: #fff !important;
  border-radius: 4px;
}

.markdown-body code { background: rgba(255,255,255,0.1); padding: 2px 4px; border-radius: 4px; font-family: var(--font-code); font-size: 13px; }
.markdown-body pre { background: rgba(0,0,0,0.5); padding: 12px; border-radius: 8px; overflow-x: auto; margin: 12px 0; border: 1px solid rgba(255,255,255,0.1); }
.markdown-body ul li p, .markdown-body ol li p {
  margin: 0;
}

.markdown-body a {
  color: #89CFF0; /* Baby Blue */
  text-decoration: none;
}
.markdown-body a:hover {
  text-decoration: underline;
}

/* Tables inside AI responses */
.chat-bubble-ai.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

@media (max-width: 768px) {
  .chat-bubble-ai.markdown-body table,
  .printable-document table,
  .article-document table {
    table-layout: fixed;
  }
}

.chat-bubble-ai.markdown-body th, .chat-bubble-ai.markdown-body td {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px 16px;
  text-align: left;
}

.chat-bubble-ai.markdown-body th {
  background-color: rgba(255, 255, 255, 0.1);
  font-weight: 600;
  color: #fff;
}

.chat-bubble-ai.markdown-body tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.03);
}

.chat-bubble-ai.markdown-body tr:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  margin: 12px 0;
  display: block;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background-color: rgba(255, 255, 255, 0.05);
}

/* Fade out images in AI responses towards the bottom to blend with text */
.chat-bubble-ai.markdown-body img,
.chat-bubble-ai .markdown-body img {
  -webkit-mask-image: linear-gradient(to bottom, black 75%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 75%, transparent 100%);
  margin-bottom: -8px;
  border-bottom: none;
}


.pdf-img-wrapper {
  position: relative;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background-color: rgba(255, 255, 255, 0.05);
  display: inline-block;
  max-width: 100%;
}

/* Image alignment classes for drag-and-drop text wrapping */
.markdown-body .pdf-img-wrapper.align-left {
  float: left;
  max-width: 45%;
  margin: 6px 20px 12px 0 !important;
  display: table !important;
  clear: none;
}
.markdown-body .pdf-img-wrapper.align-right {
  float: right;
  max-width: 45%;
  margin: 6px 0 12px 20px !important;
  display: table !important;
  clear: none;
}
.markdown-body .pdf-img-wrapper.align-center {
  display: table !important;
  margin: 16px auto !important;
  max-width: 100%;
  clear: both;
}

.markdown-body .pdf-img-wrapper img {
  margin: 0 !important;
  max-width: 100%;
  display: block;
}

/* Drag Ghost and Indicators */
.pdf-drag-ghost {
  position: fixed;
  pointer-events: none;
  opacity: 0.8;
  z-index: 100000;
  box-shadow: 0 16px 32px rgba(0,0,0,0.4);
  border: 2px solid var(--primary);
  border-radius: 16px;
  transform: translate(-50%, -50%);
  transition: transform 0.1s ease;
}

.pdf-drag-ghost.snapping {
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.drop-target-left {
  box-shadow: inset 4px 0 0 var(--primary) !important;
  background: linear-gradient(90deg, rgba(182, 120, 242, 0.1) 0%, transparent 50%) !important;
  transition: all 0.2s ease;
}

.drop-target-right {
  box-shadow: inset -4px 0 0 var(--primary) !important;
  background: linear-gradient(270deg, rgba(182, 120, 242, 0.1) 0%, transparent 50%) !important;
  transition: all 0.2s ease;
}

.drop-target-center {
  box-shadow: inset 0 4px 0 var(--primary) !important;
  background: linear-gradient(180deg, rgba(182, 120, 242, 0.1) 0%, transparent 50%) !important;
  transition: all 0.2s ease;
}

/* =========================================
   Sidebar Drawer (History)
   ========================================= */
.sidebar-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.sidebar-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-drawer {
  position: fixed;
  top: 16px; left: 20px;
  width: 40px;
  height: 40px;
  border-radius: 20px;
  background: rgba(18, 18, 22, 0.97);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  z-index: 200;
  overflow: hidden;

  /* Morphing: same technique as Dynamic Island */
  opacity: 0;
  pointer-events: none;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform: translateZ(0);
  will-change: width, height, top, left, border-radius, opacity, transform;
  transition: width 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              height 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              top 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              left 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              border-radius 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              opacity 0.2s ease,
              transform 0.5s ease;
}
.sidebar-drawer.active {
  top: 16px;
  left: 16px;
  width: 320px;
  height: calc(100% - 32px);
  border-radius: 24px;
  opacity: 1;
  pointer-events: auto;
}
.sidebar-drawer.active.fullscreen {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0;
  border-color: transparent;
}

/* Hide the hamburger button when sidebar is open to create morph effect */
body.sidebar-open #open-sidebar-btn {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.8);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#open-sidebar-btn {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Inner wrapper: fixed size prevents reflows during morph */
.sidebar-inner {
  width: 320px;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
  display: flex;
  flex-direction: column;
}
.sidebar-drawer.fullscreen .sidebar-inner {
  width: 100%;
}

/* Tool Status Indicator for Deep Research */
.tool-status-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(var(--primary-color-rgb, 100, 100, 255), 0.1);
  border: 1px solid rgba(var(--primary-color-rgb, 100, 100, 255), 0.2);
  border-radius: 12px;
  margin-bottom: 16px;
  align-self: flex-start;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  animation: slideInUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.gemini-sparkle-container {
  width: 24px;
  height: 24px;
  min-width: 24px;
  min-height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #A371F7; /* Gemini Purple */
  animation: rotateSparkle 4s linear infinite;
}

.gemini-sparkle {
  width: 100%;
  height: 100%;
}

@keyframes rotateSparkle {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.2); }
  100% { transform: rotate(360deg) scale(1); }
}

.tool-status-text {
  background: linear-gradient(90deg, #A371F7, #1A73E8, #A371F7);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shineText 3s linear infinite;
}

@keyframes shineText {
  to {
    background-position: 200% center;
  }
}

.sidebar-header {
  padding: 30px 24px 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.sidebar-header h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 0;
  background: linear-gradient(90deg, #fff, #ddd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Vollbild-Grid für die einzelnen Blöcke */
.sidebar-drawer.fullscreen .history-list {
  padding: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.history-group-header {
  grid-column: 1 / -1;
  font-size: 15px;
  font-weight: 500;
  color: #999;
  margin-top: 12px;
  margin-bottom: 2px;
  padding-left: 4px;
}

.markdown-body p {
  margin-top: 0;
  margin-bottom: 16px;
  line-height: 1.6;
}

.markdown-body ul, 
.markdown-body ol {
  padding-left: 12px;
  margin-top: 16px;
  margin-bottom: 24px;
  list-style-position: inside;
}

.markdown-body li {
  margin-bottom: 12px;
  line-height: 1.6;
  padding-left: 4px;
}

.markdown-body li::marker {
  color: #007aff;
  font-weight: bold;
}

.MathJax_Display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 1em 0;
  margin: 1em 0;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
}

.history-item {
  padding: 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: transform 0.1s ease, filter 0.1s ease, border-color 0.1s ease;
  will-change: transform;
  display: flex;
  flex-direction: column;
  min-height: 100px;
  flex-shrink: 0;
}
.history-item:hover {
  transform: translateY(-2px);
  filter: brightness(1.2);
  border-color: rgba(255,255,255,0.15);
}
.history-item.active {
  border-color: rgba(182, 120, 242, 0.4);
  box-shadow: 
    inset 0 1px 2px rgba(255,255,255,0.2), 
    0 4px 20px rgba(182, 120, 242, 0.2);
}
.history-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.history-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
}
.history-item:hover .history-actions,
.history-actions:focus-within {
  opacity: 1;
}
.chat-action-btn {
  background: none;
  border: none;
  padding: 6px;
  color: var(--text-secondary, #999);
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.chat-action-btn:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}
.chat-action-btn.delete-btn:hover {
  background: rgba(255,60,60,0.15);
  color: #ff5555;
}
.history-preview {
  font-size: 12px;
  line-height: 1.4;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.history-date {
  font-size: 12px;
  color: #888;
  margin-top: 12px;
  font-weight: 500;
}

/* =========================================
   Dynamic Island Model Selector
   ========================================= */
.dynamic-island {
  position: relative;
  background: rgba(10, 10, 15, 0.4);
  backdrop-filter: blur(25px) saturate(150%);
  -webkit-backdrop-filter: blur(25px) saturate(150%);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 24px;
  margin: 0 auto;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  cursor: pointer;
  z-index: 1000;
  overflow: hidden;
  /* Collapsed dimensions */
  width: max-content;
  min-width: 160px;
  max-width: calc(100vw - 120px);
  height: 40px;
  padding: 0;
  transition: width 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              min-width 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              height 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              border-radius 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05),
              background 0.5s ease;
}

.dynamic-island.expanded {
  background: rgba(30, 30, 35, 0.95);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border-radius: 32px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  min-width: 250px;
  width: 250px;
  padding: 0;
  cursor: default;
}

.di-collapsed {
  position: relative;
  height: 100%;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity 0.3s ease 0.2s, transform 0.3s ease 0.2s;
  opacity: 1;
  pointer-events: none; /* Let the container handle clicks */
}

.di-collapsed > span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dynamic-island.expanded .di-collapsed {
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.di-expanded {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 16px 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  transform: scale(0.95) translateY(10px);
}

.di-expanded::-webkit-scrollbar {
  display: none;
}

.dynamic-island.expanded .di-expanded {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1) translateY(0);
  transition: opacity 0.4s ease 0.2s, transform 0.4s ease 0.2s;
}

.dropdown-page {
  min-width: 100%;
  flex: 0 0 100%;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  padding: 0 12px;
  box-sizing: border-box;
}

.model-list-container {
  max-height: 160px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
  overscroll-behavior-y: contain;
}

.model-list-container::-webkit-scrollbar {
  width: 4px;
}

.model-list-container::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.model-list-container::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

.dropdown-item {
  padding: 12px 16px;
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
  text-align: left;
}

.dropdown-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.dropdown-item.selected {
  color: #d49afb;
}

.dropdown-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: 6px 4px;
}

/* =========================================
   iOS Style Controls (Toggles & Selects)
   ========================================= */
.ios-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  appearance: none;
  background: rgba(255,255,255,0.2);
  border-radius: 12px;
  outline: none;
  cursor: pointer;
  transition: 0.3s;
  -webkit-appearance: none;
}
.ios-toggle:checked {
  background: var(--primary-accent);
}
.ios-toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.ios-toggle:checked::after {
  transform: translateX(20px);
}

.ios-select {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.1);
  color: white;
  padding: 6px 30px 6px 14px;
  border-radius: 20px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23FFFFFF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 10px top 50%;
  background-size: 10px auto;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: background 0.2s;
}
.ios-select:hover {
  background-color: rgba(255,255,255,0.15);
}
.ios-select option {
  background-color: #1c1c1e;
  color: white;
}
/* =========================================
   CUSTOM MODALS
========================================= */
@keyframes overlayFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.custom-modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10,10,12,0.85); /* Dark background without expensive blur */
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: overlayFadeIn 0.15s ease forwards;
}
.custom-modal-overlay.fade-out {
  animation: fadeOut 0.2s ease forwards;
}
.custom-modal {
  background: rgba(25, 25, 30, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  border-radius: 20px;
  width: 90%;
  max-width: 320px;
  padding: 24px;
  opacity: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform: scale(0.9) translateZ(0);
  animation: modalPop 0.3s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}
.custom-modal h3 {
  margin: 0 0 12px 0;
  font-size: 18px;
  font-weight: 600;
}
.custom-modal p {
  margin: 0 0 20px 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.4;
}
.custom-modal input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.2);
  color: #fff;
  font-size: 16px;
  margin-bottom: 24px;
  outline: none;
  font-family: inherit;
}
.custom-modal input:focus {
  border-color: rgba(182, 120, 242, 0.5);
}
.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}
.modal-btn {
  padding: 10px 16px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.modal-btn.cancel {
  background: transparent;
  color: var(--text-secondary);
}
.modal-btn.cancel:hover {
  background: rgba(255,255,255,0.05);
  color: #fff;
}
.modal-btn.confirm {
  background: rgba(255,255,255,0.1);
  color: #fff;
}
.modal-btn.confirm:hover {
  background: rgba(255,255,255,0.2);
}
.modal-btn.confirm.danger {
  background: rgba(255,60,60,0.15);
  color: #ff5555;
}
.modal-btn.confirm.danger:hover {
  background: rgba(255,60,60,0.25);
}

@keyframes modalPop {
  0% { transform: scale(0.9) translateZ(0); opacity: 0; }
  100% { transform: scale(1) translateZ(0); opacity: 1; }
}
@keyframes fadeOut {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* =========================================
   Premium Apple-Style Animations
   ========================================= */

/* --- 1. Tab Bar Active Bounce --- */
@keyframes tab-icon-bounce {
  0%   { transform: translateY(-2px) scale(1); }
  40%  { transform: translateY(-2px) scale(1.15); }
  100% { transform: translateY(-2px) scale(1); }
}

.tab-item.active svg {
  animation: tab-icon-bounce 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- 2. Send Button Animations --- */
/* Removed fog animations */

@keyframes send-spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.icon-btn.primary:active {
  transform: scale(0.7) !important;
  opacity: 0.8;
  transition: transform 0.1s cubic-bezier(0.32, 0.72, 0, 1), opacity 0.1s ease;
}

.icon-btn.primary.sending span {
  display: inline-block;
  animation: send-spin 0.6s cubic-bezier(0.32, 0.72, 0, 1) forwards;
}

/* --- 3. Staggered Chat Message Entrance --- */
@keyframes stagger-in {
  0%   { opacity: 0; transform: translateY(12px); }
  100% { opacity: 1; transform: translateY(0); }
}

.chat-message-wrapper {
  animation: stagger-in 0.35s cubic-bezier(0.32, 0.72, 0, 1) both;
  will-change: transform, opacity;
  scroll-margin-top: 150px; /* Leave space above the message when scrolled into view */
}

.chat-message-wrapper:nth-child(1)  { animation-delay: 0.03s; }
.chat-message-wrapper:nth-child(2)  { animation-delay: 0.06s; }
.chat-message-wrapper:nth-child(3)  { animation-delay: 0.09s; }
.chat-message-wrapper:nth-child(4)  { animation-delay: 0.12s; }
.chat-message-wrapper:nth-child(5)  { animation-delay: 0.15s; }
.chat-message-wrapper:nth-child(6)  { animation-delay: 0.18s; }
.chat-message-wrapper:nth-child(7)  { animation-delay: 0.21s; }
.chat-message-wrapper:nth-child(8)  { animation-delay: 0.24s; }
.chat-message-wrapper:nth-child(9)  { animation-delay: 0.27s; }
.chat-message-wrapper:nth-child(10) { animation-delay: 0.30s; }
/* Beyond 10 messages: instant (no stagger needed for deep history) */
.chat-message-wrapper:nth-child(n+11) { animation-delay: 0.32s; }

/* --- 4. Empty State Breathing --- */
@keyframes gentle-breathe {
  0%   { transform: scale(1); opacity: 0.85; }
  50%  { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); opacity: 0.85; }
}

@keyframes empty-fade-in {
  0%   { opacity: 0; transform: translateY(16px); }
  100% { opacity: 1; transform: translateY(0); }
}

.empty-state-container {
  animation: empty-fade-in 0.5s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.empty-state-emoji {
  display: inline-block;
  animation: gentle-breathe 3s ease-in-out infinite;
  will-change: transform, opacity;
}

.empty-state-text {
  animation: gentle-breathe 3s ease-in-out infinite;
  animation-delay: 0.5s;
}

/* --- 5. Input Focus Glow Enhancement --- */
.siri-capsule {
  transition: border-color 0.4s cubic-bezier(0.32, 0.72, 0, 1),
              box-shadow 0.4s cubic-bezier(0.32, 0.72, 0, 1);
}

.siri-capsule:focus-within {
  border-color: rgba(182, 120, 242, 0.3) !important;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3),
              inset 0 0 20px rgba(255, 255, 255, 0.03),
              0 0 0 1px rgba(182, 120, 242, 0.15) !important;
}

/* --- 6. Image Preview Pop-in --- */
@keyframes preview-pop {
  0%   { transform: scale(0); opacity: 0; }
  70%  { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.image-preview-pop {
  animation: preview-pop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  will-change: transform, opacity;
}

/* --- 7. View/Tab Switch Transitions --- */
@keyframes view-exit {
  0%   { opacity: 1; transform: translateX(0); }
  100% { opacity: 0; transform: translateX(-20px); }
}

@keyframes view-enter {
  0%   { opacity: 0; transform: translateX(20px); }
  100% { opacity: 1; transform: translateX(0); }
}

.view-exit-anim {
  animation: view-exit 0.15s ease forwards;
  will-change: transform, opacity;
}

.view-enter-anim {
  animation: view-enter 0.3s cubic-bezier(0.32, 0.72, 0, 1) forwards;
  will-change: transform, opacity;
}

/* =========================================
   Responsive Sidebar Push Layout
   ========================================= */
@media (min-width: 768px) {
  .sidebar-overlay.active {
    display: none !important; /* Hide overlay so chat is interactive */
  }

  .view-container {
    transition: margin-left 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05);
  }
  
  .input-capsule-container,
  .bottom-tab-bar {
    transition: left 0.5s cubic-bezier(0.3, 0.8, 0.1, 1.05);
  }

  body.sidebar-open .view-container {
    margin-left: 352px; /* 320px width + 16px left gap + 16px right gap */
  }

  body.sidebar-open .input-capsule-container,
  body.sidebar-open .bottom-tab-bar {
    left: 352px;
  }
}

/* =========================================
   Siri Knowledge Card
   ========================================= */
.siri-knowledge-card {
  display: flex;
  flex-direction: column;
  background: rgba(30, 30, 35, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  overflow: hidden;
  margin: 16px 0;
  max-width: 400px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.siri-knowledge-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.skc-image-wrapper {
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: #111;
}

.skc-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.siri-knowledge-card:hover .skc-image-wrapper img {
  transform: scale(1.05);
}

.skc-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.skc-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.01em;
}

.skc-subtitle {
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =========================================
   Siri Hero Layout (like Apple Intelligence)
   ========================================= */
.siri-hero-card {
  display: flex;
  flex-direction: column;
  margin: 16px 0 24px 0;
  width: fit-content;
  max-width: 100%;
}

.siri-hero-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  cursor: pointer;
  margin-bottom: 24px;
}

.siri-hero-title {
  font-family: 'New York', 'Times New Roman', Times, serif;
  font-size: 42px;
  line-height: 1.05;
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 0;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
  flex: 1;
}

.siri-hero-toggle-icon {
  color: rgba(255, 255, 255, 0.4);
  transition: transform 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  margin-left: 20px;
  margin-top: 8px; /* align nicely with the tall title */
  flex-shrink: 0;
}

.siri-hero-header:hover .siri-hero-toggle-icon {
  color: rgba(255, 255, 255, 0.8);
}

.siri-hero-card.collapsed .siri-hero-toggle-icon {
  transform: rotate(180deg);
}

.siri-hero-image-wrapper {
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.4s ease;
  max-height: 1000px;
  opacity: 1;
  border-radius: 20px;
  position: relative;
  width: fit-content;
  max-width: 100%;
}

.siri-hero-card.collapsed .siri-hero-image-wrapper {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
}
.siri-hero-image-top {
  position: relative;
  z-index: 3;
  width: auto;
  max-width: 80vw;
  height: auto;
  max-height: 450px;
  border-radius: 12px;
  object-fit: contain;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.siri-hero-image-top:active {
  transform: scale(0.98);
}

.wiki-svg-image {
  /* Inversion is handled via inline styles after canvas analysis */
}

/* Siri Hero Swipe Gallery */
.siri-hero-card.has-gallery {
  width: fit-content;
  max-width: 100%;
}

.siri-hero-gallery {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  gap: 16px;
  width: 100%;
  scrollbar-width: none;
  padding-bottom: 8px;
}

.siri-hero-gallery .siri-hero-image-top {
  flex: 0 0 auto;
  width: auto;
  scroll-snap-align: center;
  margin: 0;
  box-sizing: border-box;
}

.siri-hero-gallery::-webkit-scrollbar {
  display: none;
}

/* Mobile specific gallery logic to emulate phone gallery (100% width, no borders) */
@media (max-width: 768px) {
  .siri-hero-card.has-gallery {
    width: 100%;
  }
  .siri-hero-card.has-gallery .siri-hero-image-wrapper {
    width: 100%;
    border-radius: 16px;
  }
  .siri-hero-gallery {
    gap: 0; /* No gap so it feels like full pages */
  }
  .siri-hero-gallery .siri-hero-image-top {
    flex: 0 0 100%;
    width: 100%;
    max-width: 100%;
    height: 60vh; /* Make it a nice tall mobile format */
    max-height: 600px;
    object-fit: cover; /* Fill completely, no borders! */
    object-position: center 15%; /* Focus on the upper third (where faces/heads usually are) to avoid cutting them off */
    border-radius: 16px;
  }
}

/* Cinematic Fog Overlay */
.siri-hero-fog {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  border-radius: 40px;
  /* Permanent soft edge blending into black */
  box-shadow: inset 0 0 60px 30px rgba(0,0,0,1);
}

.siri-hero-fog::before, .siri-hero-fog::after {
  content: "";
  position: absolute;
  inset: -50%;
  pointer-events: none;
  background-image: radial-gradient(circle at 40% 50%, transparent 40%, rgba(0,0,0,0.8) 70%);
  background-size: 100% 100%;
  animation: siriFogSpin 15s linear infinite;
}

.siri-hero-fog::after {
  background-image: radial-gradient(ellipse at 60% 40%, transparent 45%, rgba(0,0,0,0.7) 80%);
  animation: siriFogSpin 25s linear infinite reverse;
}

@keyframes siriFogSpin {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.1); }
  100% { transform: rotate(360deg) scale(1); }
}

.wiki-image-link {
  color: #89CFF0;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: rgba(137, 207, 240, 0.4);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  transition: all 0.2s ease;
  padding: 0 2px;
  border-radius: 4px;
}

.wiki-image-link:hover {
  background: rgba(137, 207, 240, 0.15);
  text-decoration-color: rgba(137, 207, 240, 0.8);
}

/* Lightbox Overlay */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  animation: fadeIn 0.2s ease-out forwards;
}

.lightbox-overlay img {
  max-width: 95vw;
  max-height: 95vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(1.05); }
  to { opacity: 1; transform: scale(1); }
}

/* =========================================
   MathJax Support
   ========================================= */
mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

mjx-container[display="true"] {
  background: rgba(255, 255, 255, 0.05);
  padding: 16px 20px;
  border-radius: 12px;
  font-size: 1.3em !important;
  border-left: 4px solid #007aff;
  margin: 20px 0 !important;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  display: block;
}

mjx-container:not([display="true"]) {
  font-size: 1.1em !important;
  color: #a6c8ff;
  padding: 0 2px;
}

.math-display-wrapper:hover .math-copy-btn {
  opacity: 1;
}

.math-copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.7);
  padding: 8px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.2s var(--ios-spring);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.math-copy-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  transform: scale(1.05);
}

.math-copy-btn:active {
  transform: scale(0.95);
}

.math-copy-btn.copied {
  background: rgba(48, 209, 88, 0.2);
  color: #30D158;
  border-color: rgba(48, 209, 88, 0.3);
  opacity: 1;
}

.math-copy-btn.copied .icon-copy {
  display: none;
}

.math-copy-btn.copied .icon-check {
  display: block;
}

.chat-bubble-ai mjx-container {
  color: inherit;
}

/* =========================================
   Function Plot (Coordinate Systems)
   ========================================= */
.function-plot-container,
.plotly-container {
  width: 100%;
  min-height: 200px;
  background: #1c1c1e; /* Solid dark background to ensure visibility on white PDF paper */
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin: 20px 0;
  overflow: hidden;
  position: relative; /* For the reset button */
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
}

.plotly-container {
  height: 400px;
}

.function-plot-container svg {
  background: transparent !important;
  max-width: 100%;
  height: auto;
  /* Hide the top/bottom 2px to clip horizontal line artifacts generated by function-plot at boundaries */
  clip-path: inset(2px 0px 2px 0px);
}

/* Override D3 / function-plot default colors for dark mode */
.function-plot-container text {
  fill: var(--text-secondary) !important;
  font-family: inherit !important;
  font-size: 11px !important;
}

.function-plot-container .domain {
  stroke: rgba(255, 255, 255, 0.3) !important;
}

.function-plot-container .tick line {
  stroke: rgba(255, 255, 255, 0.1) !important;
}

.function-plot-container .origin {
  stroke: rgba(255, 255, 255, 0.5) !important;
  stroke-width: 1.5px !important;
}

.function-plot-container .grid .tick line {
  stroke: rgba(255, 255, 255, 0.05) !important;
}

.function-plot-container .tick.integer-tick line {
  stroke: rgba(255, 255, 255, 0.35) !important; /* Brighter for whole numbers */
}

.function-plot-container .tip {
  fill: #fff !important;
}

.function-plot-container .tip line {
  stroke: #ffffff !important;
  stroke-dasharray: 4,4;
}

.function-plot-container .top-right-legend {
  display: none !important; /* Hide default legend if any */
}

/* Reset Button */
.plot-reset-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 10;
  backdrop-filter: blur(5px);
}

.plot-reset-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

.plot-reset-btn:active {
  transform: scale(0.9);
}

/* =========================================
   Light Mode (Printer-friendly) Overrides
   These apply to PDF exports when dark mode is OFF 
   ========================================= */
.printable-document:not(.dark-mode-doc) .function-plot-container,
.printable-document:not(.dark-mode-doc) .plotly-container {
  background: transparent;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: none;
}

.printable-document:not(.dark-mode-doc) .function-plot-container text {
  fill: #000 !important;
}

.printable-document:not(.dark-mode-doc) .function-plot-container .domain {
  stroke: rgba(0, 0, 0, 0.4) !important;
}

.printable-document:not(.dark-mode-doc) .function-plot-container .tick line {
  stroke: rgba(0, 0, 0, 0.1) !important;
}

.printable-document:not(.dark-mode-doc) .function-plot-container .origin {
  stroke: rgba(0, 0, 0, 0.6) !important;
}

.printable-document:not(.dark-mode-doc) .function-plot-container .grid .tick line {
  stroke: rgba(0, 0, 0, 0.05) !important;
}

.printable-document:not(.dark-mode-doc) .function-plot-container .tick.integer-tick line {
  stroke: rgba(0, 0, 0, 0.25) !important;
}

.printable-document:not(.dark-mode-doc) .plot-reset-btn {
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.2);
  color: #000;
}

.printable-document:not(.dark-mode-doc) .plot-reset-btn:hover {
  background: rgba(0, 0, 0, 0.1);
}


/* If the AI bubble contains a siri-hero-card, remove the bubble background */
.chat-bubble-ai:has(.siri-hero-card) {
  background: transparent !important;
  box-shadow: none !important;
  border: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  padding: 0 !important;
}

/* =========================================
   PDF Modal
   ========================================= */
#pdf-modal {
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.8);
}

.pdf-modal-content {
  width: 95%;
  height: 90%;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0,0,0,0.8);
}

.pdf-modal-header {
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: var(--bg-primary);
  gap: 16px;
  flex-wrap: wrap;
}

#pdf-filename-input {
  flex: 1;
  max-width: 400px;
  text-align: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  color: white;
  padding: 6px 16px;
  font-size: 16px;
  font-family: var(--font-sans);
  outline: none;
  transition: background 0.2s;
}

#pdf-filename-input:focus {
  background: rgba(255,255,255,0.15);
}

.pdf-modal-body {
  display: flex;
  flex: 1;
  min-height: 0; /* Required to allow children to shrink inside a flex column */
  overflow: hidden;
}

@media (max-width: 768px) {
  .pdf-modal-content {
    width: 100%;
    height: 100%;
    border-radius: 0;
    border: none;
  }
  .pdf-modal-header {
    padding: 12px 16px;
  }
  .pdf-modal-header h2 {
    font-size: 18px;
    margin: 0;
  }
  #pdf-filename-input {
    order: 3;
    min-width: 100%;
    margin-top: 8px;
  }
  .pdf-modal-body {
    flex-direction: column;
  }
  .pdf-preview-pane-wrapper {
    flex: 1;
    min-height: 50vh;
  }
  .pdf-chat-pane {
    flex: 1;
    border-left: none;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
}

.pdf-preview-pane-wrapper {
  flex: 2;
  position: relative;
  background: #0d0f12; /* Black/Dark theme */
  overflow: hidden;
}

.pdf-preview-pane-wrapper::before,
.pdf-preview-pane-wrapper::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  opacity: 0.4;
  animation: aurora-drift 15s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

.pdf-preview-pane-wrapper::before {
  top: -150px; left: -150px;
  background: radial-gradient(circle, rgba(66, 133, 244, 0.4) 0%, transparent 70%);
}

.pdf-preview-pane-wrapper::after {
  bottom: -150px; right: -150px;
  background: radial-gradient(circle, rgba(217, 101, 112, 0.3) 0%, transparent 70%);
  animation-delay: -5s;
}

.pdf-preview-pane {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 40px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.printable-document {
  background: white;
  color: #000;
  width: 210mm;
  max-width: 100%;
  min-height: 297mm;
  padding: 40px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 11pt;
  line-height: 1.6;
  box-sizing: border-box;
  z-index: 1; /* Keep above aurora lights */
  position: relative; /* Keep overlay inside paper */
}

.printable-document h1 {
  color: #000;
  border: none;
  font-size: 26pt; /* Make title much larger */
  font-weight: bold;
  text-align: left;
  margin-bottom: 24px;
}

.printable-document img {
  max-width: 250px;
  max-height: 300px;
  object-fit: cover;
  display: block;
  margin: 0 auto 24px auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.printable-document h2, .printable-document h3, .printable-document h4, .printable-document h5, .printable-document h6 {
  color: #000;
  border: none;
  font-size: 12pt;
  font-weight: bold;
}

.printable-document strong,
.printable-document b {
  color: #000;
}

.printable-document p, 
.printable-document li, 
.printable-document h1, 
.printable-document h2, 
.printable-document h3, 
.printable-document h4, 
.printable-document h5, 
.printable-document h6 {
  page-break-inside: avoid;
  break-inside: avoid;
}

.printable-document ul, .printable-document ol {
  list-style-position: outside;
  padding-left: 40px;
  margin-left: 0;
}

.printable-document li {
  margin-bottom: 8px;
  color: #000;
}

.printable-document li p {
  display: inline;
  margin: 0;
}

.printable-document code, .printable-document pre {
  background: #f4f4f4;
  color: #333;
  border: 1px solid #ddd;
  font-family: var(--font-code);
  font-size: 11pt;
  padding: 4px;
  border-radius: 4px;
}

.printable-document table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  page-break-inside: avoid;
  table-layout: fixed;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.printable-document th, .printable-document td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: left;
}

.printable-document th {
  background-color: #cccccc;
  font-weight: bold;
}

/* =========================================
   PDF Dark Mode
   ========================================= */
.printable-document.dark-mode-doc {
  background: #1e1e1e;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.8);
}
.printable-document.dark-mode-doc h1,
.printable-document.dark-mode-doc h2,
.printable-document.dark-mode-doc h3,
.printable-document.dark-mode-doc h4,
.printable-document.dark-mode-doc h5,
.printable-document.dark-mode-doc h6,
.printable-document.dark-mode-doc p,
.printable-document.dark-mode-doc strong,
.printable-document.dark-mode-doc b {
  color: #eee;
}
.printable-document.dark-mode-doc li {
  color: #eee;
}
.printable-document.dark-mode-doc li::marker {
  color: #eee;
}
.printable-document.dark-mode-doc code,
.printable-document.dark-mode-doc pre {
  background: #333;
  color: #eee;
}
.printable-document.dark-mode-doc th,
.printable-document.dark-mode-doc td {
  border-color: #444;
}
.printable-document.dark-mode-doc th {
  background-color: #2a2a2a;
}

.pdf-chat-pane {
  flex: 1;
  min-height: 0; /* Prevents flex item from growing beyond its container */
  background: rgba(13, 15, 18, 0.5);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  border-left: 1px solid rgba(255,255,255,0.1);
  box-shadow: inset 1px 0 0 rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.pdf-chat-history {
  flex: 1;
  min-height: 0; /* Ensures overflow-y: auto works correctly when content grows */
  overflow-y: auto;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pdf-chat-history .chat-msg {
  padding: 12px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.4;
}

.pdf-chat-history .chat-msg.user {
  background: rgba(255,255,255,0.1);
  align-self: flex-end;
}

.pdf-chat-history .chat-msg.ai {
  background: rgba(137, 207, 240, 0.1);
  color: #89CFF0;
  align-self: flex-start;
}

.pdf-chat-input-wrapper {
  display: flex;
  gap: 8px;
  padding: 8px 16px;
  align-items: center;
}

#pdf-chat-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

/* =========================================
   PDF Loading Skeleton
   ========================================= */
.pdf-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 40px;
  background: transparent;
  z-index: 5;
}

.pdf-loading-status {
  position: absolute;
  top: 250px;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #000;
  background: linear-gradient(white, white) padding-box, 
              linear-gradient(90deg, #3278ff, #c832ff, #ffb432) border-box;
  border: 2px solid transparent;
  border-radius: 20px;
  padding: 8px 24px;
  font-size: 18px;
  font-weight: bold;
  font-family: var(--font-sans);
  z-index: 10;
  animation: pulse-glow-border 2s infinite alternate;
  text-align: center;
  white-space: nowrap;
}

.printable-document.dark-mode-doc .pdf-loading-status {
  color: #fff;
  background: linear-gradient(#1e1e1e, #1e1e1e) padding-box, 
              linear-gradient(90deg, #3278ff, #c832ff, #ffb432) border-box;
}

@keyframes pulse-glow-border {
  0% { box-shadow: 0 0 8px rgba(200, 50, 255, 0.2); transform: translate(-50%, -50%) scale(0.98); }
  100% { box-shadow: 0 0 20px rgba(200, 50, 255, 0.6); transform: translate(-50%, -50%) scale(1.02); }
}

.pdf-loading-skeleton {
  margin-top: 60px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  filter: blur(4px);
  opacity: 0.6;
}

.pdf-loading-skeleton .skel-line {
  height: 14px;
  background: linear-gradient(90deg, #4b5563 25%, #9ca3af 50%, #4b5563 75%);
  background-size: 200% 100%;
  border-radius: 4px;
  opacity: 0;
  transform-origin: left;
  animation: skel-shimmer 2s infinite linear, skel-type-in 0.6s ease-out both;
}

.printable-document.dark-mode-doc .pdf-loading-skeleton .skel-line {
  background: linear-gradient(90deg, #9ca3af 25%, #e5e7eb 50%, #9ca3af 75%);
  background-size: 200% 100%;
}

@keyframes skel-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes type-in {
  0% { clip-path: inset(0 100% 0 0); opacity: 1; }
  100% { clip-path: inset(0 0 0 0); opacity: 1; }
}

/* =========================================
   Chat Timeline Minimap
   ========================================= */
.timeline-wrapper {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 16px;
  z-index: 100;
  pointer-events: none;
}

.timeline-toggle-btn {
  position: fixed;
  top: 72px; /* Schräg rechts unterhalb des Neuer-Chat Buttons (welcher bei top 16px + height 40px endet) */
  right: 16px; /* Selbe X-Achse wie die Timeline */
  z-index: 101;
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: all 0.3s ease;
}

.timeline-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: white;
}

.timeline-toggle-btn svg {
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.timeline-toggle-btn.collapsed svg {
  transform: rotate(180deg);
}

.chat-timeline-container {
  display: flex;
  flex-direction: column;
  gap: 8px; /* Increased vertical gap */
  pointer-events: none; /* Let hover events pass through if not on a marker */
  transition: opacity 0.3s ease, transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  transform-origin: right center;
}

.timeline-wrapper.collapsed .chat-timeline-container {
  opacity: 0;
  transform: scaleX(0);
  pointer-events: none;
}

.timeline-marker-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  pointer-events: auto;
  cursor: pointer;
  padding: 6px 0; /* Increased vertical padding */
}

/* Massively increase the invisible touch/click area for mobile */
.timeline-marker-wrapper::before {
  content: "";
  position: absolute;
  top: -12px; /* Expand hitbox further up */
  bottom: -12px; /* Expand hitbox further down */
  left: -24px;
  right: -8px;
  z-index: 1;
}

.timeline-marker {
  width: 14px;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  transform-origin: right center;
}

.timeline-marker-wrapper:hover .timeline-marker {
  width: 24px;
  background: rgba(255, 255, 255, 0.8);
}

.timeline-marker-wrapper.active .timeline-marker {
  width: 20px;
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
}

.timeline-tooltip {
  position: absolute;
  right: 32px;
  background: rgba(30, 30, 30, 0.9);
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: all 0.2s ease;
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.timeline-marker-wrapper:hover .timeline-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}
@keyframes skel-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes skel-type-in {
  0% { opacity: 0; transform: scaleX(0); }
  1% { opacity: 1; transform: scaleX(0); }
  100% { opacity: 1; transform: scaleX(1); }
}

.gemini-skel-line {
  height: 14px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.85) 25%, rgba(230, 200, 255, 0.95) 50%, rgba(255, 255, 255, 0.85) 75%);
  background-size: 200% 100%;
  border-radius: 4px;
  opacity: 0;
  transform-origin: left;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.2);
  animation: skel-shimmer 2.5s infinite linear, skel-type-in 1s ease-out both;
}

@keyframes pulse-status { 0% { opacity: 0.5; } 100% { opacity: 1; } }

/* =========================================
   Deep Research & PDF Report Styling
   ========================================= */

.pdf-document img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  margin: 24px 0;
  display: block;
}

.pdf-document table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.pdf-document th, .pdf-document td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  text-align: left;
}

.pdf-document th {
  background-color: rgba(0, 0, 0, 0.03);
  font-weight: 600;
}

.pdf-document tr:last-child td {
  border-bottom: none;
}

/* Dark mode overrides for PDF document */
.dark-mode-doc table {
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.dark-mode-doc th, .dark-mode-doc td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.dark-mode-doc th {
  background-color: rgba(255, 255, 255, 0.05);
}

/* Hide details (like Gliederung/Table of contents) in PDF and Article views */
.printable-document details,
.article-document details {
  display: none !important;
}

.source-highlight {
  background: rgba(137, 207, 240, 0.15) !important;
  border-left: 4px solid #89CFF0 !important;
  padding-left: 12px !important;
  border-radius: 4px;
  transition: all 0.3s ease;
}

/* =========================================
   Article View Modal Styling
   ========================================= */

#article-view-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  background: var(--bg-color);
  overflow-y: auto;
  flex-direction: column;
}

.article-modal-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(var(--bg-color-rgb), 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.article-actions {
  display: flex;
  gap: 12px;
}

.article-action-btn {
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.05);
  transition: all 0.2s ease;
}

.article-action-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.article-modal-content {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px 120px 24px;
}

.article-document {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-primary);
  overflow-wrap: anywhere;
  word-break: break-word;
  word-wrap: break-word;
}

.article-document h1 {
  font-size: 2.5em;
  line-height: 1.2;
  margin-bottom: 40px;
  font-weight: 700;
}

.article-document h2 {
  font-size: 1.8em;
  margin-top: 60px;
  margin-bottom: 24px;
  font-weight: 600;
}

.article-document p {
  margin-bottom: 24px;
}

.article-document img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  margin: 24px auto;
}

.article-document table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  table-layout: fixed;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.article-document th, .article-document td {
  border: 1px solid rgba(255,255,255,0.1);
  padding: 10px;
  text-align: left;
}

.article-document th {
  background-color: rgba(255,255,255,0.05);
  font-weight: bold;
}

@media (max-width: 850px) {
  .printable-document {
    padding: 24px;
    min-height: auto;
  }
  .article-modal-content {
    padding: 40px 16px 80px 16px;
  }
}

/* Hide chat-specific floating UI elements when not in Chat view, or when chat is empty */
body:not(.in-chat-view) #timeline-toggle-btn,
body:not(.in-chat-view) #timeline-wrapper,
body.chat-is-empty #timeline-toggle-btn,
body.chat-is-empty #timeline-wrapper {
  display: none !important;
}

/* Removed hiding of aurora-background so it stays visible */

/* Vault Folder Styling (macOS inspired) */
.macos-folder {
  width: 100%;
  flex: 1;
  max-height: 80px;
  position: relative;
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.macos-folder > svg {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
}

.folder-emoji-wrapper {
  z-index: 2;
  filter: drop-shadow(0 1px 1px rgba(255,255,255,0.4));
  transform: translateY(12px); /* Shift down to center inside the main folder body (below the tab) */
  pointer-events: none;
}

.folder-icon-engraved {
  /* Flat silhouette perfectly darkens the exact hue of the folder without turning gray */
  color: rgba(0,0,0,0.3);
}

.icon-grid-item {
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  cursor: pointer;
  color: rgba(255,255,255,0.7);
  transition: all 0.2s;
}

.icon-grid-item:hover {
  background: rgba(255,255,255,0.1);
  color: white;
}

.icon-grid-item.selected {
  background: var(--primary-color);
  color: white;
}

/* Custom Scrollbar for icon grid */
.icon-picker-grid::-webkit-scrollbar {
  width: 6px;
}
.icon-picker-grid::-webkit-scrollbar-track {
  background: transparent;
}
.icon-picker-grid::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2);
  border-radius: 3px;
}

.folder-edit-btn {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--surface-light);
  color: var(--text-color);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.2s ease;
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.file-item:hover .folder-edit-btn {
  opacity: 1;
  transform: scale(1);
}

.folder-edit-btn:hover {
  background: var(--primary-color);
  color: white;
}

/* Folder Customization Popover */
.folder-popover {
  position: absolute;
  background: rgba(30, 30, 35, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 16px;
  width: 280px;
  z-index: 1000;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform-origin: top center;
  animation: popover-in 0.2s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes popover-in {
  from { opacity: 0; transform: scale(0.95) translateY(-10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.folder-popover h3 {
  font-size: 14px;
  font-weight: 600;
  margin: 0;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.folder-popover input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 100%;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  background: none;
  padding: 0;
}
.folder-popover input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}
.folder-popover input[type="color"]::-webkit-color-swatch {
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
}

.folder-popover input[type="text"] {
  width: 100%;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 10px;
  color: white;
  font-size: 20px;
  text-align: center;
  outline: none;
}
.folder-popover input[type="text"]:focus {
  border-color: var(--primary-color);
}

/* =========================================
   PDF Reading Mode
   ========================================= */
body.pdf-reading-mode {
  background: #000 !important;
}
body.pdf-reading-mode .aurora-background {
  display: none !important;
}
body.pdf-reading-mode::before,
body.pdf-reading-mode::after {
  display: none !important;
}

body.pdf-reading-mode #chat-messages {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 24px 120px 24px !important;
}

body.pdf-reading-mode .chat-message-wrapper {
  max-width: 100%;
  align-self: center !important;
  width: 100%;
}

body.pdf-reading-mode .chat-bubble-user,
body.pdf-reading-mode .chat-bubble-ai {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  border-radius: 0 !important;
  font-size: 16px;
  line-height: 1.6;
}

body.pdf-reading-mode .chat-bubble-user {
  color: var(--text-secondary);
  font-size: 28px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

body.pdf-reading-mode .ai-msg-actions {
  opacity: 0;
  transition: opacity 0.2s;
}

body.pdf-reading-mode .chat-message-wrapper:hover .ai-msg-actions {
  opacity: 1;
}

/* Dynamic Island PDF Title */
body.pdf-reading-mode .di-collapsed #current-model-display {
  font-size: 0;
}
body.pdf-reading-mode .di-collapsed #current-model-display::after {
  content: "PDF READER";
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
}

/* Input Collapse State */
.input-capsule-container,
.bottom-tab-bar {
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.4s;
}

body.pdf-input-collapsed .input-capsule-container,
body.pdf-input-collapsed .bottom-tab-bar {
  transform: translateY(150px);
  opacity: 0;
  pointer-events: none;
}

/* Light Mode PDF Theme */
body.pdf-reading-mode.pdf-light-mode {
  background: #f4f4f5 !important;
  color: #111827 !important;
}

body.pdf-reading-mode.pdf-light-mode .chat-overlay-header {
  background: linear-gradient(to bottom, rgba(244,244,245,1) 35%, rgba(244,244,245,0.9) 55%, rgba(244,244,245,0.6) 75%, rgba(244,244,245,0.2) 90%, rgba(244,244,245,0) 100%) !important;
}

#pdf-color-mode-btn {
  display: none !important;
}

body.pdf-reading-mode #pdf-color-mode-btn {
  display: flex !important;
}

body.pdf-reading-mode.pdf-light-mode .chat-bubble-user {
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .chat-bubble-ai {
  color: #374151 !important;
}
body.pdf-reading-mode.pdf-light-mode .markdown-body {
  color: #374151 !important;
}
body.pdf-reading-mode.pdf-light-mode .chat-bubble-ai > .markdown-body > p:first-of-type, 
body.pdf-reading-mode.pdf-light-mode .chat-bubble-ai.markdown-body > p:first-of-type {
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .pdf-top-btn {
  background: rgba(0,0,0,0.05) !important;
  border-color: rgba(0,0,0,0.1) !important;
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .di-collapsed {
  background: rgba(0,0,0,0.05) !important;
  border-color: rgba(0,0,0,0.1) !important;
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .di-collapsed svg {
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .markdown-body strong,
body.pdf-reading-mode.pdf-light-mode .markdown-body b {
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .markdown-body li::marker {
  color: #111827 !important;
}

body.pdf-reading-mode.pdf-light-mode .timeline-toggle-btn {
  background: rgba(0, 0, 0, 0.05) !important;
  border-color: rgba(0, 0, 0, 0.1) !important;
  color: rgba(0, 0, 0, 0.6) !important;
}
body.pdf-reading-mode.pdf-light-mode .timeline-toggle-btn:hover {
  background: rgba(0, 0, 0, 0.15) !important;
  color: #111827 !important;
}
body.pdf-reading-mode.pdf-light-mode .timeline-marker {
  background: rgba(0, 0, 0, 0.2) !important;
}
body.pdf-reading-mode.pdf-light-mode .timeline-marker-wrapper:hover .timeline-marker {
  background: rgba(0, 0, 0, 0.6) !important;
}
body.pdf-reading-mode.pdf-light-mode .timeline-marker-wrapper.active .timeline-marker {
  background: rgba(0, 0, 0, 0.9) !important;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2) !important;
}
body.pdf-reading-mode.pdf-light-mode .timeline-tooltip {
  background: rgba(244, 244, 245, 0.95) !important;
  color: #111827 !important;
  border-color: rgba(0, 0, 0, 0.1) !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

/* --- Performance Utilities (Low-End Devices) --- */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
  backface-visibility: hidden;
}

.contain-paint {
  contain: paint;
}

/* =========================================
   History Dropdown (Long Press)
========================================= */
.history-dropdown {
  width: 100%;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  background: rgba(25, 25, 30, 0.95);
  border: 1px solid transparent;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: max-height 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), padding 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), margin-top 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.3s ease;
  padding: 0 6px;
  margin-top: 0;
}

.history-item.show-dropdown .history-dropdown {
  opacity: 1;
  pointer-events: auto;
  max-height: 120px;
  padding: 6px;
  margin-top: 8px;
  border-color: rgba(255, 255, 255, 0.1);
}

.history-dropdown-btn {
  background: transparent;
  border: none;
  color: var(--text-primary);
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-ui);
  text-align: left;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.history-dropdown-btn svg {
  opacity: 0.7;
}

.history-dropdown-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.history-dropdown-btn.danger {
  color: #ff5555;
}

.history-dropdown-btn.danger svg {
  opacity: 0.9;
}

.history-dropdown-btn.danger:hover {
  background: rgba(255, 60, 60, 0.15);
}

.history-actions {
  display: none !important;
}

/* Erweitertes Denken (Extended Thinking) UI */
.ai-thought-process {
  margin: 10px 0 16px 0;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  overflow: hidden;
  transition: background 0.2s;
}

.ai-thought-process > summary {
  padding: 12px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  list-style: none; /* Hide default arrow */
  user-select: none;
}

.ai-thought-process > summary::-webkit-details-marker {
  display: none;
}

.ai-thought-process > summary:hover {
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.8);
}

.ai-thought-process[open] > summary {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ai-thought-process .chevron {
  transition: transform 0.3s ease;
  opacity: 0.6;
}

.ai-thought-process[open] .chevron {
  transform: rotate(180deg);
}

.thought-content {
  padding: 14px;
  font-size: 13.5px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.5);
  font-family: monospace;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(0,0,0,0.2);
}

.thought-content p:first-child {
  margin-top: 0;
}

.thought-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Inline Text-Anmerkungen (Annotations)
   ========================================================================== */

.annotation-floating-btn {
  position: fixed;
  z-index: 1000;
  background: rgba(40, 100, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  padding: 12px 24px;
  color: white;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(40, 100, 255, 0.3);
  bottom: 150px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.annotation-floating-btn.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.annotation-floating-btn:hover {
  background: rgba(40, 40, 60, 0.9);
}

.ai-text-highlight {
  background-color: rgba(137, 207, 240, 0.3); /* Baby blue highlight */
  border-radius: 4px;
  padding: 0 2px;
  margin: 0 -2px;
  color: inherit;
  cursor: pointer;
  border-bottom: 1px dashed rgba(137, 207, 240, 0.8);
}

.annotation-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.annotation-modal {
  background: rgba(15, 15, 20, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  width: 100%;
  max-width: 400px;
  padding: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.annotation-modal h3 {
  margin: 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
}

.annotation-modal blockquote {
  margin: 0;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid #89CFF0;
  border-radius: 4px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  max-height: 80px;
  overflow-y: auto;
  font-style: italic;
}

.annotation-modal textarea {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 12px;
  color: white;
  font-family: inherit;
  font-size: 14px;
  resize: none;
  min-height: 80px;
}

.annotation-modal textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.3);
}

.annotation-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.annotation-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 16px 0 16px;
  margin-bottom: -8px; /* overlap with chat input padding */
}

.annotation-chip {
  background: rgba(137, 207, 240, 0.15);
  border: 1px solid rgba(137, 207, 240, 0.3);
  color: #89CFF0;
  border-radius: 16px;
  padding: 4px 10px;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.annotation-chip .remove-chip {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  opacity: 0.7;
}

.annotation-chip .remove-chip:hover {
  opacity: 1;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* =========================================
   TTS Player (Apple Music Style)
   ========================================= */
.tts-player-container {
  position: fixed;
  bottom: calc(140px + var(--safe-area-bottom)); /* Just above the input capsule */
  left: 12px;
  right: 12px;
  z-index: 85;
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.4s ease, bottom 0.4s ease;
  pointer-events: none;
}
body.in-chat-view .tts-player-container {
  bottom: calc(160px + var(--safe-area-bottom)); /* A bit higher in chat view */
}

.tts-player-container.collapsed {
  transform: translateY(150%);
  opacity: 0;
  pointer-events: none;
}

.tts-player-container:not(.collapsed) {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

@keyframes gemini-glow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

.tts-player-inner {
  background: linear-gradient(135deg, rgba(182, 120, 242, 0.15), rgba(255, 204, 0, 0.15)), rgba(20, 20, 25, 0.7);
  background-size: 300% 300%;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), inset 0 1px 1px rgba(255,255,255,0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 8px 16px 16px 16px;
  touch-action: pan-y; /* Allow vertical drag */
  transition: all 0.3s ease;
}

.tts-player-container.playing .tts-player-inner {
  animation: gemini-glow 4s linear infinite alternate;
  background: linear-gradient(135deg, rgba(182, 120, 242, 0.3), rgba(255, 204, 0, 0.3), rgba(182, 120, 242, 0.3), rgba(20, 20, 25, 0.8));
  background-size: 300% 300%;
}

.tts-player-drag-handle {
  width: 36px;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  margin: 0 auto 12px auto;
}

.tts-player-content {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tts-player-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, #b678f2, #89CFF0);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 12px rgba(182, 120, 242, 0.3);
  flex-shrink: 0;
}

.tts-player-info {
  flex: 1;
  min-width: 0; /* for truncation */
}

.tts-player-title {
  color: white;
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
  margin-bottom: 2px;
}

.tts-player-subtitle {
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  font-weight: 500;
}

.tts-player-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tts-btn {
  background: transparent;
  color: white;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 0.2s, background 0.2s;
}

.tts-btn:active {
  opacity: 0.6;
}

.tts-play-btn {
  background: rgba(255, 255, 255, 0.1);
  width: 44px;
  height: 44px;
}

.tts-rate-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: white;
  font-size: 12px;
  font-weight: 700;
  border-radius: 12px;
  padding: 4px 8px;
  cursor: pointer;
  margin-left: 4px;
}

/* ═══════════════════════════════════════════════════════════════════
   GLASS VAULT — Premium Document View Redesign
   ═══════════════════════════════════════════════════════════════════ */

/* Wrapper */
#vault-glass-wrapper {
  width: 100%;
  box-sizing: border-box;
  padding: 20px 16px 140px 16px;
  max-width: 800px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Big Ambient Title */
.vault-ambient-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 8px 4px;
  pointer-events: none;
  user-select: none;
  white-space: pre-line;
  letter-spacing: -0.5px;
  
  /* Transparent gradient text */
  background: linear-gradient(180deg, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.05) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header bar */
.vault-header {
  position: relative;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.vault-header-sticky {
  position: sticky;
  top: -20px;
  z-index: 50;
  padding-top: 20px;
  padding-bottom: 32px;
  margin-top: -20px;
  margin-bottom: -12px !important;
  margin-left: -16px;
  margin-right: -16px;
  padding-left: 16px;
  padding-right: 16px;
  background: linear-gradient(to bottom, #000000 0%, #000000 60%, transparent 100%);
  pointer-events: none;
}
.vault-header-sticky > * {
  pointer-events: auto;
}
.vault-header-left {
  display: flex;
  flex-direction: column;
  max-width: 100%;
}
.vault-header-title {
  font-size: 28px;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  word-break: break-word;
  color: white;
}
.vault-header-sub {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  margin-top: 2px;
}
.vault-header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Action buttons inside vault header */
.vault-action-btn {
  padding: 9px 16px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.85);
  transition: opacity 0.2s, transform 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.vault-action-btn:active {
  transform: scale(0.96);
  opacity: 0.8;
}

/* 2-Column Grid */
#vault-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  flex-grow: 1;
  align-content: flex-start;
  width: 100%;
}

/* ── Glass Folder ─────────────────────────── */
.vault-folder {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.25s cubic-bezier(.22,.68,0,1.1), opacity 0.25s ease;
  will-change: auto;
  position: relative;
  min-width: 0;
}
.vault-folder:active {
  transform: scale(0.97);
}

.vault-folder-body {
  position: relative;
  width: 100%;
  aspect-ratio: 1.3;
  border-radius: 16px;
  overflow: visible;
  perspective: 800px;
}

/* Tab (top-left flap) on the BACK panel */
.vault-folder-back {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.vault-folder-tab {
  position: absolute;
  top: -8px;
  left: 8px;
  width: 35%;
  height: 16px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--folder-color) 25%, rgba(30,35,45,1)), color-mix(in srgb, var(--folder-color) 15%, rgba(20,25,35,1)));
  border-radius: 8px 8px 0 0;
  overflow: hidden;
}

.vault-folder-back-panel {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, color-mix(in srgb, var(--folder-color) 40%, rgba(15,20,30,1)) 0%, color-mix(in srgb, var(--folder-color) 15%, rgba(10,15,25,1)) 100%);
  border-radius: 16px;
  box-shadow: inset 0 1px 2px rgba(255,255,255,0.05);
  overflow: hidden;
}

/* Papers sticking out */
.vault-folder-papers {
  position: absolute;
  top: -8px;
  left: 10%;
  right: 10%;
  height: 30%;
  z-index: 2;
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.3s ease;
}

.vault-folder-detail .vault-folder-papers {
  transform: translateY(-40px) scale(0.8);
  opacity: 0;
}

.vault-paper {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 4px 4px 0 0;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.5);
  transform-origin: bottom center;
}

/* Main Front Panel */
.vault-folder-front {
  position: absolute;
  top: 10%; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, color-mix(in srgb, var(--folder-color) 70%, transparent) 0%, color-mix(in srgb, var(--folder-color) 20%, transparent) 100%);
  border-radius: 12px 12px 16px 16px;
  border: 1px solid rgba(255,255,255,0.08);
  border-top: 1px solid rgba(255,255,255,0.25);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.3), 0 8px 32px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 3;
  overflow: hidden;
  transform-origin: bottom;
  transform: rotateX(15deg);
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Icon overlay centered in folder */
.vault-folder-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.20;
  transform: translateY(4px);
  pointer-events: none;
}
.vault-folder-icon svg {
  width: 36px;
  height: 36px;
  color: rgba(255,255,255,0.9);
}

/* Folder name below */
.vault-folder-name {
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-top: 10px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 4px;
}

/* Edit button on glass folder */
.vault-folder .folder-edit-btn {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(30,30,40,0.85);
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.2s, transform 0.2s;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.vault-folder:hover .folder-edit-btn,
.vault-folder .folder-edit-btn.visible {
  opacity: 1;
  transform: scale(1);
}

/* Delete button on items */
.vault-item-delete {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,50,50,0.2);
  color: #ff4444;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  z-index: 10;
  padding: 0;
  transition: opacity 0.15s;
}

/* Hide edit/delete buttons for folders by default (in grid view) */
.vault-folder:not(.vault-folder-detail) > .folder-edit-btn,
.vault-folder:not(.vault-folder-detail) > .vault-item-delete {
  display: none !important;
}

/* In detail view, make them visible and stacked ALWAYS ON THE RIGHT */
.vault-folder-detail > .folder-edit-btn,
.vault-folder-detail > .vault-item-delete {
  display: flex !important;
  opacity: 1 !important;
  transform: scale(1) !important;
  position: absolute;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  pointer-events: auto;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  z-index: 10;
}

.vault-folder-detail > .folder-edit-btn {
  top: 15%;
  right: -48px;
  left: auto;
}
.vault-folder-detail > .vault-item-delete {
  top: calc(15% + 48px);
  right: -48px;
  left: auto;
}

/* ── Glass File Card ─────────────────────────── */
/* When a file/folder is shown as a child inside a folder detail view,
   remove clip-path so the rotation doesn't cause the top to be cut off */
.vault-child-item .vault-file-body {
  clip-path: none !important;
  -webkit-clip-path: none !important;
  border-radius: 10px; /* restore rounded corners */
}
.vault-child-item .vault-file-fold {
  display: none; /* fold doesn't make sense without clip-path */
}

.vault-file {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.25s cubic-bezier(.22,.68,0,1.1), opacity 0.25s ease;
  will-change: auto;
  position: relative;
  width: 90px;
  flex-shrink: 0; /* for horizontal scrolling */
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.12));
}
.vault-file:active {
  transform: scale(0.97);
}

.vault-file-body {
  position: relative;
  width: 100%;
  aspect-ratio: 0.71;
  /* NO border-radius or background here. We use clip-path to perfectly cut the top right corner. */
  /* The cut is 24px wide and 24px high. Since width is strictly 90px, we use 66px to avoid calc() bugs in Safari. */
  clip-path: polygon(0 0, 66px 0, 100% 24px, 100% 100%, 0 100%);
  -webkit-clip-path: polygon(0 0, 66px 0, 100% 24px, 100% 100%, 0 100%);
  transform: translateZ(0); /* Force GPU to ensure Safari actually clips */
  
  display: flex;
  flex-direction: column;
}

.vault-file-bg {
  position: absolute;
  inset: 0;
  border-radius: 10px; /* This preserves the other 3 rounded corners! */
  background: #18181b; /* Dark theme card */
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
  z-index: 0;
}

.vault-file-top-bar {
  position: absolute;
  top: 1px;
  left: 1px;
  height: 4px;
  width: 65px; /* 66px - 1px left */
  border-top-left-radius: 9px;
  z-index: 5;
}

/* File Type Colors */
.type-txt .vault-file-top-bar { background: linear-gradient(90deg, #ff4b2b, #ff416c); }
.type-html .vault-file-top-bar { background: linear-gradient(90deg, #e34c26, #f06529); }
.type-css .vault-file-top-bar { background: linear-gradient(90deg, #264de4, #2965f1); }
.type-js .vault-file-top-bar { background: linear-gradient(90deg, #f7df1e, #f0db4f); }
.type-json .vault-file-top-bar { background: linear-gradient(90deg, #d4d4d4, #a3a3a3); }
.type-md .vault-file-top-bar { background: linear-gradient(90deg, #cb3837, #800080); }
.type-pdf .vault-file-top-bar { background: #ff0000; }
.type-docx .vault-file-top-bar { background: #2b579a; }
.type-xls .vault-file-top-bar, .type-xlsx .vault-file-top-bar, .type-csv .vault-file-top-bar, .type-tsv .vault-file-top-bar { background: #217346; }
.type-pptx .vault-file-top-bar { background: #d24726; }
.type-xml .vault-file-top-bar, .type-yaml .vault-file-top-bar, .type-yml .vault-file-top-bar { background: linear-gradient(90deg, #ff00ff, #8a2be2); }
.type-png .vault-file-top-bar, .type-jpg .vault-file-top-bar, .type-jpeg .vault-file-top-bar, .type-gif .vault-file-top-bar, .type-svg .vault-file-top-bar, .type-webp .vault-file-top-bar, .type-bmp .vault-file-top-bar, .type-ico .vault-file-top-bar, .type-tiff .vault-file-top-bar { background: linear-gradient(90deg, #ff007f, #ff8c00); }
.type-mp3 .vault-file-top-bar, .type-wav .vault-file-top-bar, .type-ogg .vault-file-top-bar, .type-flac .vault-file-top-bar, .type-aac .vault-file-top-bar, .type-m4a .vault-file-top-bar { background: linear-gradient(90deg, #8a2be2, #4b0082); }
.type-mp4 .vault-file-top-bar, .type-mkv .vault-file-top-bar, .type-avi .vault-file-top-bar, .type-mov .vault-file-top-bar, .type-wmv .vault-file-top-bar { background: linear-gradient(90deg, #1e90ff, #0000cd); }
.type-zip .vault-file-top-bar, .type-rar .vault-file-top-bar, .type-7z .vault-file-top-bar, .type-tar .vault-file-top-bar, .type-gz .vault-file-top-bar { background: linear-gradient(90deg, #ffd700, #ff8c00); }
.type-exe .vault-file-top-bar, .type-dmg .vault-file-top-bar { background: #888888; }

/* The folded flap at top right */
.vault-file-fold {
  position: absolute;
  top: 0;
  right: 0;
  width: 34px;
  height: 34px;
  /* Dark fold gradient matching the dark card */
  background: linear-gradient(to bottom left, transparent 16px, #27272a 16.5px, #18181b 100%);
  border-bottom-left-radius: 10px;
  filter: drop-shadow(-2px 2px 3px rgba(0,0,0,0.5));
  z-index: 10;
}

/* Realistic Invoice Skeleton */
.vault-file-invoice {
  padding: 6px 6px;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
}

.vault-file-invoice-header {
  font-size: 4px;
  font-weight: 800;
  color: #1a1a1a;
  letter-spacing: -0.1px;
  margin-bottom: 3px;
  margin-left: 2px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.vault-file-invoice-divider {
  height: 0.5px;
  background: #d0d0d0;
  margin: 2px 0;
  width: 100%;
}

.vault-file-invoice-bottom-divider {
  height: 1px;
  background: #d0d0d0;
  margin: 6px 0 2px 0;
  width: 100%;
}

.vault-file-invoice-row {
  display: flex;
  width: 100%;
  gap: 4px;
  margin: 3px 0;
}

.vault-file-invoice-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5px;
}

.skel-text {
  height: 1.5px;
  background: #e0e0e0;
  border-radius: 0.5px;
}

.skel-text.w-full { width: 100%; }
.skel-text.w-3-4 { width: 75%; }
.skel-text.w-1-2 { width: 50%; }

.vault-file-invoice-table {
  display: flex;
  flex-direction: column;
  border: 0.5px solid #e0e0e0;
  margin: 4px 0;
}

.skel-table-header {
  height: 4px;
  background: #f0f0f0;
  border-bottom: 0.5px solid #e0e0e0;
}

.skel-table-row {
  height: 3px;
  border-bottom: 0.5px solid #f0f0f0;
}
.skel-table-row:last-child {
  border-bottom: none;
}

.skel-table-total {
  height: 4px;
  border-top: 0.5px solid #d0d0d0;
  margin-top: 1px;
}

.vault-file-invoice-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 1.5px;
}

.vault-file-icon {
  font-size: 28px;
  opacity: 0.5;
  margin-bottom: 4px;
  display: none; /* Hide old icon */
}

.vault-file-content-slot {
  position: absolute;
  top: 14px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  overflow: hidden;
  z-index: 2;
  display: flex;
  flex-direction: column;
}

.vault-file-preview-text {
  font-size: 5px;
  line-height: 1.4;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: #a1a1aa;
  word-break: break-all;
  white-space: pre-wrap;
  text-align: left;
}

.vault-file-preview-generic {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
}

.vault-file-preview-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 1;
  border-radius: 10px; /* Cut at top-right by container */
  z-index: 2;
}

.vault-file-bottom-info {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 8px 8px 6px 8px;
  display: flex;
  flex-direction: column;
  z-index: 5;
  background: linear-gradient(to top, rgba(24,24,27,1) 0%, rgba(24,24,27,0) 100%);
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
}

.vault-file-ext-label {
  font-size: 11px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 2px;
}

.vault-file-name-label {
  font-size: 8px;
  color: #a1a1aa;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.vault-file-name {
  text-align: center;
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  margin-top: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 4px;
}
.vault-file-size {
  text-align: center;
  font-size: 10px;
  color: rgba(255,255,255,0.30);
  margin-top: 2px;
}

/* ── Empty State ─────────────────────────── */
.vault-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: rgba(255,255,255,0.3);
}
.vault-empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.35;
}
.vault-empty-title {
  font-size: 18px;
  font-weight: 500;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
}
.vault-empty-sub {
  font-size: 14px;
}

/* ── Skeleton ─────────────────────────── */
.vault-skeleton-item {
  aspect-ratio: 1.3;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  animation: pulse 2s infinite;
}

/* ── Animations ─────────────────────────── */

/* Item fade-in (staggered via inline --delay) */
@keyframes vaultItemIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.vault-item-enter {
  opacity: 0;
  animation: vaultItemIn 0.35s cubic-bezier(.22,.68,0,1.1) forwards;
  animation-delay: var(--delay, 0ms);
}

/* Fade out for navigation */
.vault-item-exit {
  transition: opacity 0.2s ease, transform 0.2s ease;
  opacity: 0 !important;
  transform: scale(0.95) !important;
}

/* Long-press: scale-up glow */
.vault-folder-pressing {
  transform: scale(1.03);
}
.vault-folder-pressing .vault-folder-front, .vault-folder-detail .vault-folder-front {
  transform: rotateX(35deg);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.2), 0 0 40px rgba(100,140,255,0.15);
}

/* Other items fade away during long-press */
.vault-item-hide {
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0 !important;
  transform: scale(0.85) !important;
  pointer-events: none;
}

/* Detail mode: folder flies to position */
.vault-folder-detail {
  position: fixed !important;
  z-index: 100;
  transform: rotate(var(--folder-rot, -12deg)) !important;
  transform-origin: center center;
}

/* Detail mode overlay */
.vault-detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0,0,0,0.01);
  cursor: pointer;
}

/* Child items flying out from folder */
@keyframes vaultChildFlyOut {
  from {
    opacity: 0;
    transform: translate(var(--start-x, 0), var(--start-y, 0)) scale(0.3) rotate(0deg);
  }
  to {
    opacity: 1;
    transform: translate(0, 0) scale(1) rotate(var(--rot, 0deg));
  }
}

.vault-child-enter {
  opacity: 0;
  animation: vaultChildFlyOut 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  animation-delay: var(--delay, 0ms);
}

/* Child items flying back */
.vault-child-exit {
  transition: opacity 0.3s ease, transform 0.4s cubic-bezier(0.5, 0, 0.2, 1);
  transition-delay: var(--delay, 0ms);
  opacity: 0 !important;
  transform: translate(var(--start-x, 0), var(--start-y, 0)) scale(0.3) rotate(0deg) !important;
}

/* Items returning after back */
.vault-item-return {
  opacity: 0;
  transform: scale(0.85);
  animation: vaultItemReturn 0.35s cubic-bezier(.22,.68,0,1.1) forwards;
  animation-delay: var(--delay, 0ms);
}
@keyframes vaultItemReturn {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* =========================================
   Detective Board Cinematic Zoom Out
   ========================================= */
.detective-zoom-out {
  transform: scale(0.9) translateY(20px) !important;
  opacity: 0.5 !important;
  filter: blur(2px) !important;
  pointer-events: none !important;
}

.chat-layout {
  transition: transform 1.2s cubic-bezier(0.19, 1, 0.22, 1), opacity 1.2s ease, filter 1.2s ease;
  transform-origin: center top;
}

/* ── Timeline Layout ─────────────────────────── */
.vault-timeline-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 24px;
}

.vault-timeline-header {
  position: relative;
  padding-left: 24px;
  margin-bottom: 16px;
}

.vault-timeline-line, .vault-timeline-line-content {
  position: absolute;
  left: 0;
  width: 2px;
  background-color: rgba(255, 255, 255, 0.1);
}

.vault-timeline-line {
  top: 6px;
  bottom: -16px;
}
.vault-timeline-header::before {
  content: '';
  position: absolute;
  left: -2px;
  top: 6px;
  width: 6px;
  height: 2px;
  background-color: rgba(255, 255, 255, 0.3);
}

.vault-timeline-title {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  margin-bottom: 2px;
}

.vault-timeline-subtitle {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}

.vault-timeline-content {
  position: relative;
  padding-left: 24px;
}

.vault-timeline-line-content {
  top: 0;
  bottom: -24px;
}
.vault-timeline-group:last-child .vault-timeline-line-content {
  bottom: 0;
}

.vault-timeline-items {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 12px;
  /* Hide scrollbar */
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.vault-timeline-items::-webkit-scrollbar {
  display: none;
}