/* ================================================================
   CharSheet Cutter — Design System
   Dark theme, glassmorphism accents, purple gradient palette
   ================================================================ */

/* ===== Google Fonts loaded in HTML ===== */

/* ===== Design Tokens ===== */
:root {
  /* Background layers */
  --bg-base: #08080e;
  --bg-primary: #0c0c15;
  --bg-secondary: #111120;
  --bg-panel: rgba(18, 18, 34, 0.85);
  --bg-surface: #1a1a30;
  --bg-surface-hover: #222240;
  --bg-overlay: rgba(0, 0, 0, 0.55);
  --bg-input: #14142a;

  /* Accent */
  --accent: #7c6cf0;
  --accent-light: #a89cf8;
  --accent-dark: #5a4cc8;
  --accent-glow: rgba(124, 108, 240, 0.25);
  --accent-gradient: linear-gradient(135deg, #7c6cf0 0%, #a89cf8 100%);

  /* Text */
  --text-primary: #eaeaf4;
  --text-secondary: #9898b8;
  --text-muted: #606080;
  --text-accent: #a89cf8;

  /* Borders */
  --border: #2a2a42;
  --border-subtle: #1e1e35;
  --border-accent: rgba(124, 108, 240, 0.4);

  /* Status */
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.12);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.12);
  --error: #f87171;
  --error-bg: rgba(248, 113, 113, 0.12);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 24px rgba(124, 108, 240, 0.18);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Layout */
  --panel-width: 320px;
  --header-h: 56px;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 9999px;

  /* Transitions */
  --t-fast: 120ms ease;
  --t-normal: 220ms ease;
  --t-slow: 380ms ease;
}

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

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-color: var(--bg-surface-hover) transparent;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
  line-height: 1.5;
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

img { display: block; max-width: 100%; }

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-hover);
  border-radius: var(--r-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-dark); }

/* ===== Mobile Warning ===== */
#mobile-warning {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-base);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 32px;
  text-align: center;
}

#mobile-warning .icon { font-size: 48px; }
#mobile-warning h2 { font-size: 1.4rem; font-weight: 600; }
#mobile-warning p { color: var(--text-secondary); max-width: 360px; }

@media (max-width: 1279px) {
  #mobile-warning { display: flex; }
  #app, #privacy-notice { display: none !important; }
}

/* ===== App Layout ===== */
#app {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ===== Settings Panel ===== */
#settings-panel {
  width: var(--panel-width);
  min-width: var(--panel-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  backdrop-filter: blur(24px);
  border-right: 1px solid var(--border);
  z-index: 10;
  overflow: hidden;
}

.panel-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 2px;
}

.brand span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.panel-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-subtle);
}

/* ===== Settings Sections ===== */
.settings-section {
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  cursor: pointer;
  user-select: none;
  transition: background var(--t-fast);
}

.section-header:hover {
  background: rgba(255, 255, 255, 0.03);
}

.section-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.section-title {
  font-size: 0.85rem;
  font-weight: 600;
  flex: 1;
}

.section-badge {
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: var(--r-full);
  background: var(--bg-surface);
  color: var(--text-muted);
}

.section-chevron {
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: transform var(--t-normal);
}

.settings-section.open .section-chevron {
  transform: rotate(180deg);
}

.section-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow);
}

.settings-section.open .section-content {
  max-height: 600px;
}

.section-inner {
  padding: 4px 20px 16px;
}

.settings-section.disabled .section-header {
  opacity: 0.45;
  cursor: default;
}

.settings-section.disabled .section-header:hover {
  background: none;
}

/* ===== Grid Presets ===== */
.preset-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.preset-btn {
  padding: 6px 14px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-input);
  color: var(--text-secondary);
  transition: all var(--t-fast);
}

.preset-btn:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
  background: var(--bg-surface);
}

.preset-btn.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-glow);
}

/* ===== Custom Grid Inputs ===== */
.input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.input-row label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  min-width: 28px;
}

.input-number {
  width: 64px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-input);
  text-align: center;
  font-variant-numeric: tabular-nums;
  transition: border-color var(--t-fast);
  outline: none;
}

.input-number:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.input-x {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== Range Slider ===== */
.slider-row {
  margin-bottom: 12px;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.slider-label span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.slider-value {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-accent);
  font-variant-numeric: tabular-nums;
  min-width: 32px;
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg-surface);
  border-radius: var(--r-full);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-gradient);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
  box-shadow: var(--shadow-glow);
  cursor: pointer;
  transition: transform var(--t-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
  cursor: pointer;
}

/* ===== Checkbox Toggle ===== */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
}

.toggle-row label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.toggle-switch {
  position: relative;
  width: 40px;
  height: 22px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--bg-surface);
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  transition: all var(--t-normal);
}

.toggle-switch input:checked + .toggle-track {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--t-normal);
  box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-track::after {
  transform: translateX(18px);
}

/* ===== Color Picker ===== */
.color-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.color-row label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  flex: 1;
}

input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 32px;
  height: 32px;
  border: 2px solid var(--border);
  border-radius: var(--r-sm);
  background: none;
  cursor: pointer;
  padding: 2px;
}

input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

/* ===== Step Tabs ===== */
#step-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 24px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.step-connector {
  width: 32px;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  flex-shrink: 0;
}

.step-connector.done {
  background: var(--accent);
}

.step-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--r-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--t-normal);
  white-space: nowrap;
  border: 1px solid transparent;
}

.step-tab:hover:not(.disabled) {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

.step-tab.active {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--shadow-glow);
  border-color: transparent;
}

.step-tab.disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--bg-surface);
  flex-shrink: 0;
}

.step-tab.active .step-num {
  background: rgba(255, 255, 255, 0.2);
}

.step-tab.done .step-num {
  background: var(--success);
  color: #fff;
}

.step-tab.done {
  color: var(--text-secondary);
}

/* ===== Work Area ===== */
#work-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
}

.step-contents {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.step-content {
  display: none;
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: 24px;
  animation: fadeIn 0.25s ease;
}

.step-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Drop Zone ===== */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--r-lg);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--t-normal);
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--r-lg);
  background: var(--accent-gradient);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--t-normal);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(124, 108, 240, 0.06);
}

.drop-zone.drag-over {
  border-style: solid;
  box-shadow: inset 0 0 30px rgba(124, 108, 240, 0.1);
}

.drop-zone-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.7;
}

.drop-zone-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.drop-zone-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.drop-zone-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: var(--r-full);
  background: var(--accent-gradient);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--t-fast);
  box-shadow: var(--shadow-glow);
}

.drop-zone-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow), var(--shadow-md);
}

.drop-zone-formats {
  margin-top: 14px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

#file-input { display: none; }

/* ===== Thumbnail List ===== */
.thumbnail-section {
  margin-top: 24px;
}

.thumbnail-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.thumbnail-section-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.thumbnail-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.thumbnail-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.thumbnail-item {
  position: relative;
  width: 100px;
  height: 100px;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--t-fast);
  background: var(--bg-surface);
}

.thumbnail-item:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.thumbnail-item.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.thumbnail-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumbnail-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 4px 6px;
  font-size: 0.6rem;
  color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.thumbnail-delete {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.65);
  color: var(--error);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--t-fast);
  backdrop-filter: blur(4px);
}

.thumbnail-item:hover .thumbnail-delete {
  opacity: 1;
}

.thumbnail-delete:hover {
  background: var(--error);
  color: #fff;
}

.thumbnail-dimensions {
  position: absolute;
  top: 4px;
  left: 4px;
  padding: 2px 5px;
  font-size: 0.55rem;
  background: rgba(0, 0, 0, 0.6);
  color: var(--text-secondary);
  border-radius: var(--r-xs);
  backdrop-filter: blur(4px);
  font-variant-numeric: tabular-nums;
}

/* ===== Grid Preview ===== */
.grid-preview-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.image-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.image-selector-btn {
  padding: 6px 14px;
  border-radius: var(--r-sm);
  font-size: 0.8rem;
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
  transition: all var(--t-fast);
}

.image-selector-btn.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: #fff;
}

.grid-canvas-wrapper {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  background: var(--bg-secondary);
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

#grid-canvas {
  max-width: 100%;
  max-height: 100%;
}

.cell-checkboxes-overlay {
  position: absolute;
  pointer-events: none;
}

.cell-checkbox-wrapper {
  position: absolute;
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cell-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--r-xs);
  background: rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: all var(--t-fast);
  backdrop-filter: blur(4px);
  position: relative;
}

.cell-checkbox:checked {
  background: var(--accent);
  border-color: var(--accent-light);
}

.cell-checkbox:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.cell-checkbox:hover {
  transform: scale(1.15);
  border-color: var(--accent-light);
}

.cell-index-label {
  position: absolute;
  top: 6px;
  left: 6px;
  padding: 2px 6px;
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(0, 0, 0, 0.6);
  color: rgba(255, 255, 255, 0.7);
  border-radius: var(--r-xs);
  pointer-events: none;
}

/* ===== Grid Empty State ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 32px;
  text-align: center;
  color: var(--text-muted);
  gap: 12px;
}

.empty-state-icon {
  font-size: 3rem;
  opacity: 0.5;
}

.empty-state-text {
  font-size: 0.9rem;
}

/* ===== Result Grid ===== */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.result-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: all var(--t-fast);
}

.result-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.result-card-preview {
  aspect-ratio: 1;
  background: repeating-conic-gradient(
    var(--bg-surface-hover) 0% 25%,
    var(--bg-surface) 0% 50%
  ) 50% / 20px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
}

.result-card-preview img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.result-card-info {
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-card-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.result-card-actions {
  display: flex;
  gap: 4px;
}

.result-card-actions button {
  width: 26px;
  height: 26px;
  border-radius: var(--r-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: all var(--t-fast);
}

.result-card-actions button:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

/* ===== Process Button ===== */
.btn-process {
  width: 100%;
  padding: 12px 20px;
  border-radius: var(--r-md);
  background: var(--accent-gradient);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  transition: all var(--t-fast);
  box-shadow: var(--shadow-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-process:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  filter: brightness(1.1);
}

.btn-process:active:not(:disabled) {
  transform: translateY(0);
}

.btn-process:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  filter: saturate(0.3);
}

/* ===== Progress Bar ===== */
.progress-container {
  margin-top: 12px;
  display: none;
}

.progress-container.visible {
  display: block;
}

.progress-bar-track {
  width: 100%;
  height: 6px;
  background: var(--bg-surface);
  border-radius: var(--r-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: var(--r-full);
  transition: width var(--t-normal);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 30px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { opacity: 0; }
  50% { opacity: 1; }
  100% { opacity: 0; }
}

.progress-text {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-weight: 500;
  font-size: 0.8rem;
  transition: all var(--t-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
  background: var(--bg-surface);
}

.btn-ghost {
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.btn-danger {
  color: var(--error);
}

.btn-danger:hover {
  background: var(--error-bg);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.75rem;
}

/* ===== Privacy Notice ===== */
#privacy-notice {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  z-index: 50;
}

.lock-icon {
  font-size: 0.85rem;
}

/* ===== Toast / Notifications ===== */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 18px;
  border-radius: var(--r-md);
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInRight 0.3s ease;
  max-width: 380px;
}

.toast.success { border-color: var(--success); }
.toast.warning { border-color: var(--warning); }
.toast.error { border-color: var(--error); }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ===== Modal / Lightbox ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
  cursor: pointer;
}

.modal-content {
  max-width: 90vw;
  max-height: 90vh;
  cursor: default;
}

.modal-content img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--t-fast);
  backdrop-filter: blur(8px);
}

.modal-close:hover {
  background: var(--error);
}

/* ===== Model Loading Overlay ===== */
.model-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 800;
  background: rgba(8, 8, 14, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  backdrop-filter: blur(8px);
}

.model-loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.model-loading-text {
  font-size: 1rem;
  font-weight: 500;
}

.model-loading-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===== Utilities ===== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.text-sm { font-size: 0.8rem; }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.hidden { display: none !important; }

/* ===== Checkerboard Background (for transparency) ===== */
.checker-bg {
  background: repeating-conic-gradient(
    var(--bg-surface-hover) 0% 25%,
    var(--bg-surface) 0% 50%
  ) 50% / 16px 16px;
}

/* ===== Section Divider ===== */
.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 8px 0;
}

/* ===== Subsection Label ===== */
.subsection-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* ===== Model Status Indicator ===== */
.model-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.model-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.model-status-dot.pending {
  background: var(--text-muted);
}

.model-status-dot.loading {
  background: var(--warning);
  animation: pulse-dot 1s ease infinite;
}

.model-status-dot.ready {
  background: var(--success);
}

.model-status-dot.error {
  background: var(--error);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

/* ===== Error Badge on Result Cards ===== */
.result-card-error {
  background: var(--error-bg);
  border-color: var(--error);
}

.result-card-error-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 8px;
  font-size: 0.65rem;
  font-weight: 600;
  background: var(--error);
  color: #fff;
  border-radius: var(--r-full);
}

.retry-btn {
  padding: 6px 14px;
  border-radius: var(--r-sm);
  background: var(--warning-bg);
  border: 1px solid var(--warning);
  color: var(--warning);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
}

/* ===== Site Navigation Header (for doc pages & main header link) ===== */
.site-header {
  height: var(--header-h);
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.site-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--t-fast);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text-primary);
  text-decoration: none;
}

/* ===== Doc Pages Layout (Guide, Privacy, Terms, Contact) ===== */
.doc-page {
  overflow-y: auto !important;
}

.doc-container {
  max-width: 860px;
  margin: 40px auto;
  padding: 0 24px 80px;
}

.doc-hero {
  margin-bottom: 36px;
  text-align: center;
}

.doc-hero h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.doc-hero p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.doc-section {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 28px;
  margin-bottom: 24px;
}

.doc-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-section p, .doc-section li {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.92rem;
}

.doc-section ul, .doc-section ol {
  padding-left: 20px;
  margin-top: 10px;
}

.doc-section li {
  margin-bottom: 8px;
}

/* Ad Slot Container (Placeholder) */
.ad-slot-container {
  background: var(--bg-surface);
  border: 1px dashed var(--border);
  border-radius: var(--r-md);
  padding: 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin: 20px 0;
}