/* ==========================================================================
   Design System: Neubrutalism (DESIGN.md)
   Style: Bold, Colorful, Raw, Playful, High-Contrast
   Rules: Hard borders (2-3px), Hard offset drop shadows (45°), No gradients,
          No glassmorphism, No blurs, Anti-Slop craftsmanship
   Mobile: Continuous fluid reflow, 44px+ tap targets, no horizontal overflow
   ========================================================================== */

/* Light Theme (Default Neubrutalism) */
:root,
[data-theme="light"] {
  /* Surfaces & Canvas */
  --bg-app: #FFFDF0;          /* Warm paper canvas */
  --bg-card: #FFFFFF;         /* Solid crisp card */
  --bg-surface: #F4F4F5;      /* Inset surface */
  --bg-surface-hover: #E4E4E7;
  --bg-input: #FFFFFF;

  /* Neubrutalist Core Colors (DESIGN.md) */
  --color-primary: #FFEB3B;   /* Bold vibrant yellow */
  --color-primary-hover: #FDD835;
  --color-secondary: #FF5252; /* Punchy red/coral */
  --color-secondary-hover: #EF4444;
  --color-tertiary: #2196F3;  /* Electric blue */
  --color-tertiary-hover: #1976D2;
  --color-success: #00E676;   /* Neubrutalist green */
  --color-warning: #FFB300;   /* Neubrutalist amber */
  --color-neutral: #121212;   /* Off-black / charcoal */

  /* Borders & Shadows */
  --border-color: #121212;
  --border-subtle: #121212;
  --border-active: #121212;
  --border-focus: #121212;

  --shadow-color: #121212;
  --shadow-sm: 2px 2px 0 var(--shadow-color);
  --shadow-base: 4px 4px 0 var(--shadow-color);
  --shadow-card: 6px 6px 0 var(--shadow-color);
  --shadow-hover: 6px 6px 0 var(--shadow-color);
  --shadow-active: 1px 1px 0 var(--shadow-color);

  /* Typography */
  --text-main: #121212;
  --text-sub: #27272A;
  --text-muted: #52525B;
  --text-inverse: #FFFFFF;

  /* Badges & Callouts */
  --callout-bg: #FEF08A;
  --callout-border: #121212;
  --callout-text: #121212;

  /* Status Colors */
  --status-online: #00E676;
  --status-checking: #FFEB3B;
  --status-waking: #2196F3;
  --status-offline: #FF5252;
}

/* Dark Theme (Electric Neubrutalism) */
[data-theme="dark"] {
  /* Surfaces & Canvas */
  --bg-app: #18181B;          /* Deep off-black / zinc-900 */
  --bg-card: #27272A;         /* Charcoal card / zinc-800 */
  --bg-surface: #1E1E24;      /* Inset surface */
  --bg-surface-hover: #3F3F46;
  --bg-input: #18181B;

  /* Neubrutalist Core Colors */
  --color-primary: #FFEB3B;   /* High-contrast yellow punch */
  --color-primary-hover: #FFF176;
  --color-secondary: #FF5252; /* Coral red */
  --color-secondary-hover: #F87171;
  --color-tertiary: #60A5FA;  /* Electric sky blue */
  --color-tertiary-hover: #93C5FD;
  --color-success: #4ADE80;
  --color-warning: #FBBF24;
  --color-neutral: #FFFFFF;

  /* Borders & Shadows */
  --border-color: #FAFAFA;
  --border-subtle: #FAFAFA;
  --border-active: #FAFAFA;
  --border-focus: #FFEB3B;

  --shadow-color: #000000;
  --shadow-sm: 2px 2px 0 var(--shadow-color);
  --shadow-base: 4px 4px 0 var(--shadow-color);
  --shadow-card: 6px 6px 0 var(--shadow-color);
  --shadow-hover: 6px 6px 0 var(--color-primary);
  --shadow-active: 1px 1px 0 var(--shadow-color);

  /* Typography */
  --text-main: #FAFAFA;
  --text-sub: #E4E4E7;
  --text-muted: #A1A1AA;
  --text-inverse: #18181B;

  /* Badges & Callouts */
  --callout-bg: #27272A;
  --callout-border: #FFEB3B;
  --callout-text: #FAFAFA;

  /* Status Colors */
  --status-online: #4ADE80;
  --status-checking: #FFEB3B;
  --status-waking: #60A5FA;
  --status-offline: #FF5252;
}

/* Shared Design Tokens */
:root {
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Menlo, Monaco, monospace;

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --radius-circle: 50%;

  --transition-fast: 0.15s ease-out;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100dvh;
  overflow-x: hidden;
  font-family: var(--font-family);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

button, input, select, textarea {
  font-family: inherit;
  touch-action: manipulation;
}

:focus-visible {
  outline: 3px solid var(--border-color);
  outline-offset: 2px;
}

/* ==========================================================================
   Layout Structure
   ========================================================================== */

.app-layout {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;
  overflow-x: hidden;
}

/* Top Sticky Navigation */
.top-nav {
  min-height: 60px;
  border-bottom: 3px solid var(--border-color);
  background-color: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 100;
  padding-top: env(safe-area-inset-top, 0);
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  min-height: 60px;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast);
  min-height: 44px;
}

.brand-badge:hover {
  transform: translate(-1px, -1px);
}

.brand-avatar {
  border-radius: var(--radius-xs);
  display: block;
  border: 2px solid var(--border-color);
  box-shadow: 2px 2px 0 var(--shadow-color);
  flex-shrink: 0;
}

.brand-name {
  font-weight: 800;
  font-size: 0.98rem;
  letter-spacing: -0.02em;
  color: var(--text-main);
  text-transform: uppercase;
  white-space: nowrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Status Indicator Pill */
.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.status-indicator:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-base);
  background-color: var(--bg-surface-hover);
}

.status-indicator:active {
  transform: translate(1px, 1px);
  box-shadow: var(--shadow-active);
}

.status-indicator-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--text-muted);
  border: 1.5px solid var(--border-color);
  flex-shrink: 0;
}

.status-online .status-indicator-dot {
  background-color: var(--status-online);
}

.status-checking .status-indicator-dot {
  background-color: var(--status-checking);
}

.status-waking .status-indicator-dot {
  background-color: var(--status-waking);
}

.status-offline .status-indicator-dot {
  background-color: var(--status-offline);
}

/* Icon Buttons */
.btn-icon {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.btn-icon:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-base);
  background-color: var(--color-primary);
  color: #121212;
}

.btn-icon:active {
  transform: translate(1px, 1px);
  box-shadow: var(--shadow-active);
}

/* ==========================================================================
   Main Content Container & Desktop Workspace Grid
   ========================================================================== */

.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 36px auto 56px;
  padding: 0 24px;
}

/* 2-Column Desktop Grid */
.desktop-workspace-grid {
  display: grid;
  grid-template-columns: 440px 1fr;
  gap: 36px;
  align-items: start;
  margin-bottom: 40px;
}

/* Sidebar Column */
.workspace-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 84px;
}

/* Sidebar Cards (Neubrutalist Block) */
.sidebar-card {
  background-color: var(--bg-card);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.sidebar-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--shadow-color);
}

/* Tag Pill */
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-primary);
  color: #121212;
  border: 2px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  box-shadow: 2px 2px 0 var(--shadow-color);
}

.tag-dot {
  width: 7px;
  height: 7px;
  background-color: #121212;
  border-radius: var(--radius-circle);
}

.hero-card .page-title {
  text-align: left;
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--text-main);
}

.hero-card .page-desc {
  text-align: left;
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* Aspect Ratio Guide Card */
.sidebar-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.02em;
}

.ratio-comparison-grid {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 18px 14px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
}

.ratio-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.ratio-badge {
  font-size: 0.68rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  border: 1.5px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.danger-badge {
  background-color: #FEE2E2;
  color: #991B1B;
}

[data-theme="dark"] .danger-badge {
  background-color: #7F1D1D;
  color: #FEE2E2;
}

.success-badge {
  background-color: #DCFCE7;
  color: #166534;
}

[data-theme="dark"] .success-badge {
  background-color: #14532D;
  color: #DCFCE7;
}

.ratio-box {
  border: 2.5px solid var(--border-color);
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  box-shadow: 2px 2px 0 var(--shadow-color);
  position: relative;
  overflow: hidden;
}

.square-box {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-xs);
}

.vertical-box {
  width: 82px;
  height: 140px;
  border-radius: var(--radius-xs);
}

.ratio-demo-img {
  width: 100%;
  height: 100%;
  display: block;
}

.cropped-img {
  object-fit: cover;
  object-position: center 60%;
}

.full-img {
  object-fit: cover;
  object-position: center center;
}

.ratio-tag-overlay {
  position: absolute;
  bottom: 4px;
  right: 4px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 800;
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  letter-spacing: 0.02em;
  box-shadow: 1px 1px 0 var(--shadow-color);
  z-index: 2;
}

.tag-cropped {
  background-color: #FEE2E2;
  color: #991B1B;
}

[data-theme="dark"] .tag-cropped {
  background-color: #7F1D1D;
  color: #FEE2E2;
}

.tag-full {
  background-color: var(--color-primary);
  color: #121212;
}

.ratio-divider {
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.ratio-caption {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--text-sub);
}

.ratio-guide-note {
  font-size: 0.82rem;
  color: var(--text-sub);
  line-height: 1.5;
}

/* Security Checklist */
.security-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.security-check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--text-sub);
}

.security-check-item .check-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background-color: var(--status-online);
  color: #121212;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 1px;
  box-shadow: 1px 1px 0 var(--shadow-color);
}

.security-check-item strong {
  color: var(--text-main);
  font-weight: 700;
}

/* Secondary Feature Cards */
.desktop-feature-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 10px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--shadow-color);
}

.feature-card-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.feature-step-tag {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background-color: var(--color-primary);
  border: 1.5px solid var(--border-color);
  color: #121212;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  box-shadow: 1px 1px 0 var(--shadow-color);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.feature-desc {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* Neubrutalist Card Panel */
.card-panel {
  background-color: var(--bg-card);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  position: relative;
  width: 100%;
}

/* Desktop vs Mobile Toggle */
.mobile-only-intro {
  display: none !important;
}

.mobile-only-note {
  display: none !important;
}

.header-intro {
  text-align: center;
  margin-bottom: 24px;
}

.page-title {
  font-size: clamp(1.45rem, 4.5vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.25;
}

.page-desc {
  font-size: clamp(0.88rem, 2.5vw, 0.95rem);
  color: var(--text-sub);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.55;
  font-weight: 400;
}

/* Informative Callout (Neubrutalist Sticker Note) */
.info-note {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background-color: var(--callout-bg);
  border: 2px solid var(--callout-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 28px;
  color: var(--callout-text);
  box-shadow: var(--shadow-sm);
}

.info-note-icon {
  color: var(--callout-text);
  flex-shrink: 0;
  margin-top: 2px;
}

.info-note-content {
  flex: 1;
  min-width: 0;
}

.info-note-text {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--callout-text);
}

.info-note-text strong {
  color: var(--callout-text);
  font-weight: 700;
}

/* ==========================================================================
   Progress Flow Indicator
   ========================================================================== */

.flow-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
  gap: 8px;
  width: 100%;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.flow-step.active {
  color: var(--text-main);
}

.step-num {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  box-shadow: 1px 1px 0 var(--shadow-color);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}

.flow-step.active .step-num {
  background-color: var(--color-primary);
  color: #121212;
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
  transform: translate(-1px, -1px);
}

.flow-divider {
  flex: 1;
  max-width: 36px;
  min-width: 10px;
  height: 3px;
  background-color: var(--border-color);
  opacity: 0.3;
}

.flow-divider.active {
  opacity: 1;
  background-color: var(--border-color);
}

/* ==========================================================================
   File Uploader & Dropzone
   ========================================================================== */

.file-uploader {
  border: 3px dashed var(--border-color);
  background-color: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: clamp(24px, 5vw, 36px) clamp(16px, 4vw, 24px);
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-style var(--transition-fast);
  margin-bottom: 28px;
  outline: none;
  width: 100%;
}

.file-uploader:hover,
.file-uploader:focus-visible,
.file-uploader.drag-over {
  border-style: solid;
  background-color: #FEF9C3;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-base);
}

[data-theme="dark"] .file-uploader:hover,
[data-theme="dark"] .file-uploader:focus-visible,
[data-theme="dark"] .file-uploader.drag-over {
  background-color: #3F3F46;
}

.upload-icon-container {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  background-color: var(--color-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #121212;
  box-shadow: var(--shadow-sm);
}

.upload-lead {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.upload-sub {
  font-size: 0.85rem;
  color: var(--text-sub);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ==========================================================================
   Dual Preview Component
   ========================================================================== */

.upload-preview {
  text-align: left;
  width: 100%;
}

.dual-preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
  width: 100%;
}

.preview-box {
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.preview-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.preview-frame-rect {
  width: 140px;
  height: 186px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-frame-rect img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-avatar-wrap {
  margin: 14px 0 10px;
}

.preview-avatar-circle {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border-color);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}

.preview-avatar-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
  font-weight: 500;
}

.preview-actions-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  gap: 12px;
}

.file-summary {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  flex: 1;
}

.file-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-res {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.btn-subtle {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 44px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-subtle:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-base);
  background-color: var(--color-primary);
  color: #121212;
}

.btn-subtle:active {
  transform: translate(1px, 1px);
  box-shadow: var(--shadow-active);
}

/* ==========================================================================
   Method Switcher & Form Inputs
   ========================================================================== */

.method-box {
  margin-bottom: 28px;
  width: 100%;
}

.form-label {
  display: block;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.segmented-control {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background-color: var(--bg-surface);
  padding: 6px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  gap: 6px;
  width: 100%;
}

.segment-btn {
  background: transparent;
  border: 2px solid transparent;
  color: var(--text-sub);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  min-height: 44px;
  transition: all var(--transition-fast);
  text-align: center;
}

.segment-btn:hover {
  color: var(--text-main);
}

.segment-btn.active {
  background-color: var(--color-primary);
  color: #121212;
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
  transform: translate(-1px, -1px);
}

.phone-box {
  margin-top: 16px;
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  width: 100%;
}

.sub-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.input-phone-wrapper {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  min-height: 48px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.input-phone-wrapper:focus-within {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-base);
}

.phone-sign {
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.15rem;
  margin-right: 8px;
  flex-shrink: 0;
}

.input-phone-wrapper input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  padding: 12px 0;
  font-size: 1rem; /* 16px prevents iOS Safari auto-zoom */
  font-family: var(--font-mono);
  font-weight: 600;
}

.field-guide {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.4;
}

.field-guide strong {
  color: var(--text-main);
}

/* ==========================================================================
   Cloudflare Turnstile Anti-Bot Verification
   ========================================================================== */

.turnstile-container,
.turnstile-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 18px 0 14px;
  padding: 14px 16px;
  background-color: var(--bg-canvas);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 2px 2px 0 var(--shadow-color);
  width: 100%;
  transition: border-color var(--speed-normal), box-shadow var(--speed-normal);
}

.turnstile-container:hover,
.turnstile-wrapper:hover {
  border-color: var(--color-primary);
}

.turnstile-slot,
.turnstile-widget {
  min-height: 65px;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  overflow-x: auto;
}

.turnstile-note,
.turnstile-feedback {
  font-size: 0.82rem;
  font-weight: 700;
  margin-top: 8px;
  text-align: center;
  color: var(--text-sub);
  line-height: 1.4;
}

.turnstile-note.success,
.turnstile-feedback.success {
  color: var(--color-success);
}

.turnstile-note.error,
.turnstile-feedback.error {
  color: var(--color-secondary);
}

/* ==========================================================================
   Action Buttons (Neubrutalism Primary CTA)
   ========================================================================== */

.submit-container {
  margin-top: 28px;
  width: 100%;
}

.btn-action {
  width: 100%;
  background-color: var(--color-primary);
  color: #121212;
  border: 3px solid var(--border-color);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  min-height: 52px;
  box-shadow: var(--shadow-base);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.btn-action:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.btn-action:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-active);
}

.btn-action:disabled {
  background-color: var(--bg-surface);
  color: var(--text-muted);
  border-color: var(--text-muted);
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.65;
}

.btn-compact {
  width: auto;
  padding: 10px 20px;
  font-size: 0.88rem;
  min-height: 44px;
}

/* ==========================================================================
   Verification & QR View
   ========================================================================== */

.verify-layout {
  text-align: center;
  width: 100%;
}

.qr-panel, .pairing-panel {
  margin-bottom: 24px;
  width: 100%;
}

.qr-canvas-holder {
  width: min(260px, 75vw);
  height: min(260px, 75vw);
  margin: 0 auto 24px;
  background-color: #FFFFFF;
  border-radius: var(--radius-md);
  border: 3px solid var(--border-color);
  box-shadow: var(--shadow-card);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
}

.qr-visual {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
}

.loader-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.circular-spin {
  width: 40px;
  height: 40px;
  border: 4px solid var(--bg-surface);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loader-text {
  font-size: 0.85rem;
  color: #121212;
  font-weight: 700;
}

.pairing-header {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.pairing-code-card {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background-color: var(--color-primary);
  border: 3px solid var(--border-color);
  box-shadow: var(--shadow-card);
  padding: 14px 22px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  max-width: 100%;
}

.pairing-code-val {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 800;
  letter-spacing: 0.15em;
  color: #121212;
  white-space: nowrap;
}

.btn-copy {
  background: #FFFFFF;
  border: 2px solid var(--border-color);
  color: #121212;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  min-height: 44px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}

.btn-copy:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-base);
}

.btn-copy:active {
  transform: translate(1px, 1px);
  box-shadow: var(--shadow-active);
}

.instruction-box {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  text-align: left;
  max-width: 520px;
  margin: 0 auto 24px;
  box-shadow: var(--shadow-sm);
  width: 100%;
}

.guide-lead {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.guide-steps {
  font-size: 0.85rem;
  color: var(--text-sub);
  padding-left: 20px;
  line-height: 1.65;
}

.guide-steps strong {
  color: var(--text-main);
  font-weight: 700;
}

.live-status-block {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  gap: 10px;
  width: 100%;
}

.pulse-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.live-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-tertiary);
  border: 1.5px solid var(--border-color);
  flex-shrink: 0;
}

.live-heading {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--text-main);
  text-transform: uppercase;
  white-space: nowrap;
}

.live-info {
  font-size: 0.86rem;
  color: var(--text-main);
  font-weight: 600;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cancel-wrap {
  margin-top: 12px;
  width: 100%;
}

.btn-cancel {
  background: var(--color-secondary);
  border: 2px solid var(--border-color);
  color: #FFFFFF;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 800;
  cursor: pointer;
  min-height: 44px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.btn-cancel:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-base);
  background-color: var(--color-secondary-hover);
}

.btn-cancel:active {
  transform: translate(1px, 1px);
  box-shadow: var(--shadow-active);
}

/* ==========================================================================
   Success View
   ========================================================================== */

.done-panel {
  text-align: center;
  padding: 12px 0;
  width: 100%;
}

.done-icon-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-color: var(--color-success);
  border: 3px solid var(--border-color);
  box-shadow: var(--shadow-base);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #121212;
}

.done-title {
  font-size: clamp(1.25rem, 4vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 8px;
}

.done-subtitle {
  font-size: 0.95rem;
  color: var(--text-sub);
  max-width: 520px;
  margin: 0 auto 24px;
  line-height: 1.55;
}

.security-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  text-align: left;
  max-width: 540px;
  margin: 0 auto 28px;
  box-shadow: var(--shadow-sm);
  width: 100%;
}

.shield-badge {
  padding-top: 2px;
  color: var(--color-tertiary);
  flex-shrink: 0;
}

.shield-heading {
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
  text-transform: uppercase;
}

.shield-desc {
  font-size: 0.84rem;
  color: var(--text-sub);
  line-height: 1.5;
}

.shield-desc strong {
  color: var(--text-main);
  font-weight: 700;
}

.done-actions {
  max-width: 280px;
  margin: 0 auto;
  width: 100%;
}

/* ==========================================================================
   Modal Dialog
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 300;
  overflow-y: auto;
}

.modal-window {
  background-color: var(--bg-card);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-card);
  max-height: calc(100dvh - 32px);
  display: flex;
  flex-direction: column;
}

.modal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 2px solid var(--border-color);
  gap: 10px;
}

.modal-header-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.btn-modal-close {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.btn-modal-close:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-base);
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

.btn-modal-close:active {
  transform: translate(1px, 1px);
  box-shadow: var(--shadow-active);
}

.modal-content {
  padding: 20px;
  overflow-y: auto;
}

.modal-explanation {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 18px;
  line-height: 1.5;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
}

.field-input {
  background-color: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 12px 14px;
  font-size: 1rem; /* 16px prevents iOS zoom */
  font-family: var(--font-mono);
  outline: none;
  min-height: 48px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.field-input:focus {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-base);
}

.field-note {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.modal-bottom {
  padding: 14px 20px;
  border-top: 2px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.app-footer {
  border-top: 3px solid var(--border-color);
  background-color: var(--bg-card);
  padding: 28px 16px calc(28px + env(safe-area-inset-bottom, 0));
  margin-top: auto;
  width: 100%;
}

.footer-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.footer-tech {
  font-size: 0.85rem;
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-tech a {
  color: var(--text-main);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  font-weight: 800;
}

.footer-tech a:hover {
  background-color: var(--color-primary);
}

.footer-legal {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Utility Classes & Animations
   ========================================================================== */

.hidden {
  display: none !important;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ==========================================================================
   Responsive Reflow System (DESIGN.md & antislop-layoutmobile)
   Breakpoints: 991px (Tablet) -> 768px (Phablet) -> 600px (Mobile) -> 420px (Small Mobile)
   ========================================================================== */

/* 1. Tablet & Medium Screen Breakpoint (<= 991px) */
@media (max-width: 991px) {
  .desktop-workspace-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 720px;
    margin: 0 auto 30px;
  }

  .workspace-sidebar {
    display: none;
  }

  .mobile-only-intro {
    display: block !important;
  }

  .mobile-only-note {
    display: flex !important;
  }

  .card-panel {
    max-width: 720px;
    margin: 0 auto;
  }

  .desktop-feature-cards {
    grid-template-columns: 1fr;
    max-width: 720px;
    margin: 20px auto 0;
  }
}

/* 2. Phablet Breakpoint (<= 768px) */
@media (max-width: 768px) {
  .main-content {
    margin: 24px auto 36px;
    padding: 0 16px;
  }

  .card-panel {
    padding: 26px 20px;
    box-shadow: 5px 5px 0 var(--shadow-color);
  }

  /* Multi-column collapses below 768px (DESIGN.md rule) */
  .dual-preview-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .preview-frame-rect {
    width: 140px;
    height: 186px;
    margin: 0 auto;
  }

  .preview-avatar-circle {
    width: 124px;
    height: 124px;
    margin: 0 auto 10px;
  }

  .qr-canvas-holder {
    width: min(250px, 75vw);
    height: min(250px, 75vw);
  }
}

/* 2. Standard Mobile Breakpoint (<= 600px) */
@media (max-width: 600px) {
  .top-nav {
    min-height: 56px;
  }

  .nav-content {
    min-height: 56px;
    padding: 6px 12px;
  }

  .brand-badge {
    gap: 8px;
    padding: 2px 4px;
  }

  .brand-name {
    font-size: 0.9rem;
  }

  .main-content {
    margin: 16px auto 32px;
    padding: 0 12px;
  }

  .card-panel {
    padding: 20px 16px;
    box-shadow: 4px 4px 0 var(--shadow-color);
    border-width: 2.5px;
  }

  /* Navbar Status Button: hide long text, show compact dot pill on narrow screens */
  #server-status-text {
    display: none;
  }

  .status-indicator {
    padding: 6px 12px;
    min-width: 44px;
    justify-content: center;
  }

  .btn-icon {
    width: 44px;
    height: 44px;
  }

  /* Steps styling */
  .flow-steps {
    margin-bottom: 24px;
    gap: 6px;
  }

  .flow-step .step-text {
    font-size: 0.76rem;
  }

  .flow-divider {
    max-width: 24px;
    min-width: 8px;
    height: 2.5px;
  }

  /* Preview action bar reflow */
  .preview-actions-bar {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 12px;
    padding: 12px;
  }

  .file-summary {
    align-items: center;
  }

  .file-title {
    max-width: 100%;
    font-size: 0.85rem;
  }

  .btn-subtle {
    width: 100%;
    min-height: 44px;
  }

  /* Phone input guide */
  .phone-box {
    padding: 14px;
  }

  /* Buttons */
  .btn-action {
    min-height: 50px;
    font-size: 0.96rem;
    padding: 12px 18px;
    box-shadow: 3px 3px 0 var(--shadow-color);
  }

  .btn-action:hover:not(:disabled) {
    box-shadow: 4px 4px 0 var(--shadow-color);
    transform: translate(-1px, -1px);
  }

  /* Instruction & Live status */
  .instruction-box {
    padding: 14px 16px;
  }

  .guide-steps {
    padding-left: 18px;
    font-size: 0.82rem;
  }

  .live-status-block {
    padding: 10px 14px;
  }

  .live-info {
    font-size: 0.82rem;
  }

  .btn-cancel {
    width: 100%;
    min-height: 44px;
  }

  /* Security card in success view */
  .security-card {
    padding: 14px 16px;
  }

  /* Modal */
  .modal-backdrop {
    padding: 12px;
  }

  .modal-window {
    box-shadow: 5px 5px 0 var(--shadow-color);
  }

  .modal-top {
    padding: 14px 16px;
  }

  .modal-content {
    padding: 16px;
  }

  .modal-bottom {
    padding: 12px 16px;
  }

  .modal-bottom .btn-action {
    width: 100%;
    min-height: 44px;
  }
}

/* 3. Small Mobile / Narrow Viewport Breakpoint (<= 420px) */
@media (max-width: 420px) {
  .main-content {
    margin: 12px auto 24px;
    padding: 0 8px;
  }

  .card-panel {
    padding: 18px 12px;
    box-shadow: 3px 3px 0 var(--shadow-color);
    border-width: 2px;
    border-radius: var(--radius-sm);
  }

  .brand-badge {
    padding: 0;
  }

  .brand-name {
    font-size: 0.84rem;
  }

  .brand-avatar {
    width: 26px;
    height: 26px;
  }

  .page-title {
    font-size: 1.35rem;
  }

  .page-desc {
    font-size: 0.82rem;
  }

  .info-note {
    padding: 10px 12px;
    gap: 8px;
  }

  .info-note-text {
    font-size: 0.78rem;
  }

  /* Steps: On very small phones, collapse inactive text to prevent awkward wrapping */
  .flow-steps {
    gap: 4px;
  }

  .flow-step:not(.active) .step-text {
    display: none;
  }

  .flow-step.active .step-text {
    font-size: 0.72rem;
  }

  .flow-divider {
    max-width: 16px;
    min-width: 6px;
  }

  .step-num {
    width: 26px;
    height: 26px;
    min-width: 26px;
    font-size: 0.75rem;
  }

  /* Method Switcher: stack vertically so both options have full tap targets */
  .segmented-control {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 4px;
  }

  .segment-btn {
    min-height: 44px;
    font-size: 0.8rem;
    padding: 8px 10px;
  }

  /* Pairing Code Display: stack code and copy button cleanly */
  .pairing-code-card {
    flex-direction: column;
    gap: 12px;
    width: 100%;
    padding: 14px 12px;
    box-shadow: 3px 3px 0 var(--shadow-color);
  }

  .pairing-code-val {
    font-size: 1.5rem;
    letter-spacing: 0.08em;
  }

  .btn-copy {
    width: 100%;
    justify-content: center;
    min-height: 44px;
  }

  /* Live status */
  .live-status-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  /* Success View */
  .done-icon-circle {
    width: 60px;
    height: 60px;
  }

  .done-title {
    font-size: 1.2rem;
  }

  .done-subtitle {
    font-size: 0.84rem;
  }

  .security-card {
    padding: 12px 14px;
    gap: 10px;
  }

  .shield-heading {
    font-size: 0.84rem;
  }

  .shield-desc {
    font-size: 0.78rem;
  }

  .done-actions {
    max-width: 100%;
  }

  .modal-backdrop {
    padding: 8px;
  }

  .modal-window {
    box-shadow: 3px 3px 0 var(--shadow-color);
  }
}