:root {
  /* Glass Base */
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: rgba(0, 0, 0, 0.6);
  --glass-highlight: rgba(255, 255, 255, 0.05);
  --glass-blur: 24px;

  /* Accent – Cool Blue‑Violet → Cyan */
  --accent-start: #6C5CE7;
  --accent-mid: #A29BFE;
  --accent-end: #00CEC9;
  --accent-gradient: linear-gradient(135deg, var(--accent-start), var(--accent-mid), var(--accent-end));
  --accent-glow: rgba(108, 92, 231, 0.15);
  --accent-soft: rgba(108, 92, 231, 0.08);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Backgrounds */
  --bg-base: #0a0a0a;
  --bg-surface: #111111;
  --bg-elevated: #1a1a1a;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Easing (spring-like) */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Durations */
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  transition: background var(--duration-fast) var(--ease-smooth);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ---------- Glassmorphism Base ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
  border-radius: var(--radius-lg);
}

/* Glass Variants */
.glass-light {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.7);
}

.glass-accent {
  background: var(--accent-soft);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(108, 92, 231, 0.15);
  box-shadow: 0 4px 32px var(--accent-glow);
}

.glass-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
  transition: all var(--duration-base) var(--ease-smooth);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  transform: translateY(-2px);
}

/* ---------- Background Gradients (Animated Mesh) ---------- */
.bg-gradient-dark {
  background:
    radial-gradient(ellipse at 20% 50%, rgba(108, 92, 231, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 206, 201, 0.06) 0%, transparent 50%),
    var(--bg-base);
}

.bg-gradient-radial {
  background:
    radial-gradient(circle at 30% 40%, rgba(108, 92, 231, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(0, 206, 201, 0.04) 0%, transparent 40%),
    var(--bg-base);
}

.bg-gradient-subtle {
  background:
    linear-gradient(180deg, rgba(108, 92, 231, 0.03) 0%, transparent 50%),
    var(--bg-base);
}

/* Animated gradient mesh (2026 trend) */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.animate-gradient-mesh {
  background: linear-gradient(-45deg, #0a0a0a, #1a1a2e, #16213e, #0a0a0a);
  background-size: 400% 400%;
  animation: gradientShift 12s ease-in-out infinite;
}

/* ---------- Glow Effects ---------- */
.glow-accent {
  box-shadow:
    0 0 40px var(--accent-glow),
    0 0 80px rgba(108, 92, 231, 0.04),
    inset 0 0 40px rgba(108, 92, 231, 0.02);
}

.glow-hover {
  transition: box-shadow var(--duration-base) var(--ease-smooth);
}
.glow-hover:hover {
  box-shadow:
    0 0 60px var(--accent-glow),
    0 0 120px rgba(108, 92, 231, 0.06),
    inset 0 0 60px rgba(108, 92, 231, 0.03);
}

/* ---------- Text Styles ---------- */
.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-white {
  background: linear-gradient(135deg, #f1f5f9, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Buttons ---------- */
.btn-glass {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-spring);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn-glass::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-highlight);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-smooth);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.btn-glass:hover::before {
  opacity: 1;
}
.btn-glass:active {
  transform: scale(0.95);
}

.btn-glass-primary {
  background: var(--accent-soft);
  border-color: rgba(108, 92, 231, 0.2);
  color: var(--accent-mid);
}

.btn-glass-primary:hover {
  background: rgba(108, 92, 231, 0.18);
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-glass-accent {
  background: var(--accent-gradient);
  border: none;
  color: #0a0a0a;
  font-weight: 600;
}

.btn-glass-accent:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.btn-glass-accent:active {
  transform: scale(0.95);
}

.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ---------- Inputs ---------- */
.input-glass {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.input-glass::placeholder {
  color: var(--text-muted);
}

.input-glass:focus {
  border-color: rgba(108, 92, 231, 0.3);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.04);
}

.input-glass:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

/* ---------- Code Blocks ---------- */
.code-block-glass {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #e2e8f0;
  overflow-x: auto;
  position: relative;
}

.code-block-glass .copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}
.code-block-glass .copy-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* ---------- Animations (Framer Motion inspired) ---------- */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
.animate-fade-in {
  animation: fadeIn var(--duration-base) var(--ease-smooth) forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.animate-fade-in-up {
  animation: fadeInUp var(--duration-slow) var(--ease-spring) forwards;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.animate-fade-in-down {
  animation: fadeInDown var(--duration-slow) var(--ease-spring) forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
.animate-slide-in {
  animation: slideIn var(--duration-slow) var(--ease-spring) forwards;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
.animate-slide-in-right {
  animation: slideInRight var(--duration-slow) var(--ease-spring) forwards;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
.animate-scale-in {
  animation: scaleIn var(--duration-base) var(--ease-spring) forwards;
}

@keyframes pulseGlow {
  0%,
  100% {
    box-shadow: 0 0 20px var(--accent-glow);
  }
  50% {
    box-shadow: 0 0 40px rgba(108, 92, 231, 0.2);
  }
}
.animate-pulse-glow {
  animation: pulseGlow 2.5s ease-in-out infinite;
}

/* Shimmer (light streak) */
@keyframes shimmer {
  0% {
    background-position: -200% center;
  }
  100% {
    background-position: 200% center;
  }
}
.animate-shimmer {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.04) 25%,
    rgba(255, 255, 255, 0.08) 50%,
    rgba(255, 255, 255, 0.04) 75%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-6px);
  }
}
.animate-float {
  animation: float 3s ease-in-out infinite;
}

@keyframes floatSlow {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}
.animate-float-slow {
  animation: floatSlow 5s ease-in-out infinite;
}

@keyframes spinSlow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.animate-spin-slow {
  animation: spinSlow 4s linear infinite;
}

/* ---------- Stagger Children ---------- */
.stagger-children>* {
  opacity: 0;
  animation: fadeInUp var(--duration-slow) var(--ease-spring) forwards;
}
.stagger-children>*:nth-child(1) {
  animation-delay: 0.05s;
}
.stagger-children>*:nth-child(2) {
  animation-delay: 0.10s;
}
.stagger-children>*:nth-child(3) {
  animation-delay: 0.15s;
}
.stagger-children>*:nth-child(4) {
  animation-delay: 0.20s;
}
.stagger-children>*:nth-child(5) {
  animation-delay: 0.25s;
}
.stagger-children>*:nth-child(6) {
  animation-delay: 0.30s;
}
.stagger-children>*:nth-child(7) {
  animation-delay: 0.35s;
}
.stagger-children>*:nth-child(8) {
  animation-delay: 0.40s;
}
.stagger-children>*:nth-child(9) {
  animation-delay: 0.45s;
}
.stagger-children>*:nth-child(10) {
  animation-delay: 0.50s;
}

/* ---------- Utility Animation Classes ---------- */
.hover-lift {
  transition: transform var(--duration-base) var(--ease-spring),
    box-shadow var(--duration-base) var(--ease-smooth);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.hover-glow {
  transition: box-shadow var(--duration-base) var(--ease-smooth);
}
.hover-glow:hover {
  box-shadow: 0 0 60px var(--accent-glow);
}

.hover-scale {
  transition: transform var(--duration-fast) var(--ease-spring);
}
.hover-scale:hover {
  transform: scale(1.04);
}
.hover-scale:active {
  transform: scale(0.96);
}

/* ---------- Glass Components ---------- */

/* Chat Bubble */
.chat-bubble-glass {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 1rem;
  transition: all var(--duration-base) var(--ease-smooth);
}
.chat-bubble-glass.user {
  background: var(--accent-soft);
  border-color: rgba(108, 92, 231, 0.12);
}

/* Sidebar Glass */
.sidebar-glass {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255, 255, 255, 0.04);
}

/* Header Glass */
.header-glass {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* Dropdown Glass */
.dropdown-glass {
  background: rgba(20, 20, 20, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.6);
}
.dropdown-glass .dropdown-item {
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-smooth);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.dropdown-glass .dropdown-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

/* Chain of Thought */
.cot-step-glass {
  border-left: 2px solid rgba(255, 255, 255, 0.06);
  padding-left: 0.75rem;
  margin-left: 0.5rem;
  transition: border-color var(--duration-fast) var(--ease-smooth);
}
.cot-step-glass.active {
  border-left-color: var(--accent-mid);
}
.cot-step-glass .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.65rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  color: var(--accent-mid);
  flex-shrink: 0;
}
.cot-step-glass .step-number.done {
  background: rgba(108, 92, 231, 0.15);
  color: var(--accent-mid);
}
.cot-step-glass .step-number.pending {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
}

/* File Tree */
.file-tree-glass .file-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-smooth);
}
.file-tree-glass .file-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}
.file-tree-glass .file-item.selected {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}
.file-tree-glass .file-item .folder-chevron {
  transition: transform var(--duration-fast) var(--ease-smooth);
  margin-left: auto;
}
.file-tree-glass .file-item .folder-chevron.open {
  transform: rotate(90deg);
}

/* Web Preview Frame */
.preview-frame-glass {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.preview-frame-glass iframe {
  width: 100%;
  height: 200px;
  border: none;
  background: var(--bg-base);
}

/* Prompt Input */
.prompt-input-glass {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) var(--ease-smooth);
}
.prompt-input-glass:focus-within {
  border-color: rgba(108, 92, 231, 0.2);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.03);
}
.prompt-input-glass textarea {
  flex: 1;
  border: none;
  resize: none;
  outline: none;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text-primary);
  background: transparent;
  min-height: 2.5rem;
  max-height: 8rem;
  padding: 0.25rem 0;
}
.prompt-input-glass textarea::placeholder {
  color: var(--text-muted);
}

/* Badge / Tag */
.badge-glass {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  text-transform: uppercase;
}
.badge-glass.accent {
  background: var(--accent-soft);
  border-color: rgba(108, 92, 231, 0.15);
  color: var(--accent-mid);
}

/* Divider */
.divider-glass {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.06), transparent);
  border: none;
  margin: 0.5rem 0;
}

/* Tooltip */
.tooltip-glass {
  position: relative;
}
.tooltip-glass .tooltip-text {
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  padding: 0.3rem 0.8rem;
  font-size: 0.75rem;
  color: var(--text-primary);
  background: rgba(20, 20, 20, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-fast) var(--ease-smooth);
}
.tooltip-glass:hover .tooltip-text {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* Loading Spinner */
.spinner-glass {
  width: 2rem;
  height: 2rem;
  border: 2px solid rgba(255, 255, 255, 0.04);
  border-top-color: var(--accent-mid);
  border-radius: var(--radius-full);
  animation: spinSlow 0.8s linear infinite;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  :root {
    --glass-blur: 16px;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
  }
  .glass {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .glass-card:hover {
    transform: translateY(-1px);
  }
  .code-block-glass {
    font-size: 0.75rem;
    padding: 0.75rem;
  }
  .btn-glass {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }
}

/* ---------- Utilities ---------- */
.relative {
  position: relative;
}
.overflow-hidden {
  overflow: hidden;
}
.select-none {
  user-select: none;
}
.transition-all {
  transition: all var(--duration-base) var(--ease-smooth);
}
.transition-fast {
  transition: all var(--duration-fast) var(--ease-smooth);
}
.transition-slow {
  transition: all var(--duration-slow) var(--ease-smooth);
}