/* ==========================================================================
   Article-to-Video Studio — Production Adaptive UI
   - Default Theme: Light Mode (with Dark Mode toggle persisted in localStorage)
   - Mobile-First Adaptive Typography & Smartphone Layout
   ========================================================================== */

:root,
[data-theme="light"] {
  --bg: #f8fafc;
  --bg-topbar: #ffffff;
  --bg-tabs: #f1f5f9;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-input: #ffffff;
  --bg-code: #0f172a;
  --text-code: #e2e8f0;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: rgba(37, 99, 235, 0.1);
  --primary-text: #1d4ed8;
  --success: #059669;
  --success-soft: rgba(5, 150, 105, 0.12);
  --warning: #d97706;
  --danger: #dc2626;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --radius: 10px;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-topbar: #0b1120;
  --bg-tabs: #111827;
  --bg-card: #1e293b;
  --bg-subtle: rgba(15, 23, 42, 0.6);
  --bg-input: #0f172a;
  --bg-code: #090d16;
  --text-code: #cbd5e1;
  --border: #334155;
  --border-strong: #475569;
  --text: #f8fafc;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-soft: rgba(59, 130, 246, 0.18);
  --primary-text: #93c5fd;
  --success: #10b981;
  --success-soft: rgba(16, 185, 129, 0.18);
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.25);
}

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

html {
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.45;
  min-height: 100vh;
  font-size: clamp(0.82rem, 1.6vw, 0.92rem);
  transition: background-color 0.15s ease, color 0.15s ease;
}

code {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.84em;
  word-break: break-all;
}

/* Header / Topbar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 10px;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-logo {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  flex-shrink: 0;
}

.brand-logo-img {
  width: clamp(32px, 5vw, 38px);
  height: clamp(32px, 5vw, 38px);
  border-radius: 8px;
  object-fit: contain;
  flex-shrink: 0;
}

.heading-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.inline-video-icon {
  width: 22px;
  height: 22px;
  object-fit: contain;
  flex-shrink: 0;
}

.topbar h1 {
  font-size: clamp(0.98rem, 2.2vw, 1.18rem);
  font-weight: 700;
  line-height: 1.2;
}

.subtitle {
  font-size: clamp(0.72rem, 1.5vw, 0.8rem);
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.cred-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.cred-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--warning);
  flex-shrink: 0;
}

.cred-badge.configured .dot {
  background: var(--success);
}

/* Navigation Tabs */
.tabs-nav {
  display: flex;
  gap: 4px;
  padding: 8px 18px 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tabs);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-bottom: 2.5px solid transparent;
  padding: 8px 13px;
  font-size: clamp(0.76rem, 1.6vw, 0.86rem);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

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

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Main Container & Grid */
.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 16px 18px 40px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.session-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  gap: 8px;
  flex-wrap: wrap;
}

.label-muted {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.card h2 {
  font-size: clamp(0.92rem, 1.9vw, 1.02rem);
  margin-bottom: 6px;
  color: var(--text);
}

.help-text {
  font-size: clamp(0.76rem, 1.5vw, 0.83rem);
  color: var(--text-muted);
  margin-bottom: 12px;
}

.mt-md {
  margin-top: 12px;
}

.mt-lg {
  margin-top: 18px;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* Dropzones */
.dropzone {
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--bg-subtle);
  margin-bottom: 10px;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.dropzone-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: left;
}

.dropzone-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.dropzone-sub {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Forms & Inputs */
.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-secondary);
}

.field-hint {
  display: block;
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-group {
  margin-bottom: 13px;
}

textarea,
.input-text,
.input-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  color: var(--text);
  border-radius: 7px;
  padding: 8px 10px;
  font-size: 0.85rem;
  font-family: inherit;
}

textarea:focus,
.input-text:focus,
.input-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-soft);
}

/* Pills & Thumbnails */
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.pill {
  background: var(--primary-soft);
  border: 1px solid rgba(37, 99, 235, 0.25);
  color: var(--primary-text);
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 600;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 8px;
  margin-top: 8px;
}

.image-thumb {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 7px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 16 / 10;
}

.image-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-thumb span {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  font-size: 0.66rem;
  padding: 2px 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Option Toggles */
.toggles-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  cursor: pointer;
  background: var(--bg-subtle);
  padding: 8px 10px;
  border-radius: 7px;
  border: 1px solid var(--border);
  font-size: 0.82rem;
}

.toggle-row input[type="checkbox"] {
  margin-top: 3px;
  transform: scale(1.1);
  accent-color: var(--primary);
}

.toggle-row span {
  display: flex;
  flex-direction: column;
}

.toggle-row small {
  color: var(--text-muted);
  font-size: 0.73rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 7px;
  font-weight: 600;
  font-size: 0.82rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-lg {
  width: 100%;
  padding: 11px 16px;
  font-size: 0.92rem;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.76rem;
}

.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Status & Step Tracker */
.status-box {
  margin-top: 14px;
  padding: 12px;
  border-radius: 8px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
}

.hidden {
  display: none !important;
}

.status-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  font-size: 0.84rem;
}

.status-msg {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

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

.step-pills {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
}

.step-pill {
  text-align: center;
  font-size: 0.7rem;
  padding: 5px 3px;
  border-radius: 5px;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.step-pill.active {
  background: var(--primary-soft);
  color: var(--primary-text);
  border-color: var(--primary);
  font-weight: 600;
}

.step-pill.done {
  background: var(--success-soft);
  color: var(--success);
  border-color: var(--success);
  font-weight: 600;
}

/* Token Analytics KPI Cards & Responsive Table */
.token-kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.token-kpi-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 8px 10px;
  text-align: center;
}

.token-kpi-card .kpi-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.token-kpi-card .kpi-val {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  font-weight: 700;
  color: var(--primary);
  margin-top: 2px;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: 7px;
}

.token-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
  min-width: 480px;
}

.token-table th,
.token-table td {
  padding: 7px 9px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.token-table th {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-weight: 600;
  white-space: nowrap;
}

.token-table td.num,
.token-table th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Video Player & Inspector */
.player-wrapper {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-wrapper video {
  width: 100%;
  height: 100%;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  background: var(--bg-subtle);
}

.empty-video-icon {
  width: 56px;
  height: 56px;
  object-fit: contain;
  opacity: 0.92;
}

.subtabs {
  display: flex;
  gap: 5px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.subtab-btn {
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.subtab-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.subtab-panel {
  display: none;
}

.subtab-panel.active {
  display: block;
}

.code-box {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.75rem;
  color: var(--text-code);
  max-height: 410px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* History & Info Lists */
.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 12px;
}

.history-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.divider-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  font-weight: 700;
  margin: 16px 0 10px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 5px;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.info-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 12px;
}

.info-item h3 {
  font-size: 0.86rem;
  margin-bottom: 4px;
  color: var(--primary);
}

.info-item p,
.info-item li {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.info-item ul {
  margin-left: 16px;
  margin-top: 4px;
}

/* ==========================================================================
   Smartphone & Tablet Responsive Breakpoints
   ========================================================================== */
@media (max-width: 920px) {
  .grid-2col {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 8px 12px;
  }

  .topbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .tabs-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 6px 10px;
    gap: 4px;
  }

  .tab-btn {
    text-align: center;
    padding: 7px 6px;
    font-size: 0.74rem;
    border-radius: 6px;
    border-bottom: none;
    background: var(--bg-card);
    border: 1px solid var(--border);
  }

  .tab-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
  }

  .container {
    padding: 12px 10px 32px;
  }

  .card {
    padding: 12px;
  }

  .step-pills {
    grid-template-columns: 1fr 1fr;
  }

  .token-kpi-grid {
    grid-template-columns: 1fr 1fr;
  }

  .dropzone-content {
    flex-direction: column;
    text-align: center;
    gap: 6px;
  }

  .action-bar .btn {
    flex: 1 1 auto;
  }
}