/* ==========================================================================
   Root Harmonic Studio — Base Tokens (Light Gallery & Dark Studio), Layout & Modals
   Standards: Strict Cascade Specificity | Zero Margin for Component Spacing
   ========================================================================== */

:root,
[data-theme="light"] {
  --bg-canvas: #F3F4F6;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #F8FAFC;
  --bg-surface-border: #E2E8F0;
  --bg-input: #F1F5F9;

  --text-main: #0F172A;
  --text-muted: #475569;
  --text-dim: #64748B;

  --accent-primary: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-emerald-text: #059669;
  --accent-blue-text: #2563EB;
  --accent-amber-text: #B45309;
  --accent-pink-text: #BE185D;

  --border-hover: rgba(15, 23, 42, 0.24);
  --swatch-border: rgba(15, 23, 42, 0.12);
  --surface-subtle-hover: rgba(15, 23, 42, 0.06);
  --pill-track-bg: #E2E8F0;
  --scrollbar-thumb: rgba(15, 23, 42, 0.18);
  --scrollbar-thumb-hover: rgba(15, 23, 42, 0.34);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-sm: 0 1px 4px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.09);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
}

[data-theme="dark"] {
  --bg-canvas: #090D14;
  --bg-surface: #101622;
  --bg-surface-elevated: #182030;
  --bg-surface-border: #222C42;
  --bg-input: #141B29;

  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  --accent-primary: #3B82F6;
  --accent-hover: #2563EB;
  --accent-emerald-text: #34D399;
  --accent-blue-text: #60A5FA;
  --accent-amber-text: #FBBF24;
  --accent-pink-text: #F472B6;

  --border-hover: rgba(255, 255, 255, 0.24);
  --swatch-border: rgba(255, 255, 255, 0.14);
  --surface-subtle-hover: rgba(255, 255, 255, 0.08);
  --pill-track-bg: rgba(0, 0, 0, 0.35);
  --scrollbar-thumb: rgba(255, 255, 255, 0.16);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.32);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  padding: 0;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 20px;
  line-height: 1;
  display: inline-block;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
}

/* Studio 30% Sidebar / 70% Showcase Architecture (Independent Dual Scroll) */
.app-main.studio-layout {
  flex: 1;
  height: 100vh;
  max-height: 100vh;
  display: grid;
  grid-template-columns: 3fr 7fr;
  gap: 24px;
  padding: 16px 24px;
  max-width: 1920px;
  width: 100%;
  margin-inline: auto;
  box-sizing: border-box;
  overflow: hidden;
  align-items: stretch;
}

.column-sidebar,
.column-showcase {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  transform: translateZ(0);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  padding-right: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

.column-sidebar::-webkit-scrollbar,
.column-showcase::-webkit-scrollbar {
  width: 6px;
}

.column-sidebar::-webkit-scrollbar-track,
.column-showcase::-webkit-scrollbar-track {
  background: transparent;
}

.column-sidebar::-webkit-scrollbar-thumb,
.column-showcase::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-pill);
}

.column-sidebar::-webkit-scrollbar-thumb:hover,
.column-showcase::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* Global Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 9px;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

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

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

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.icon-btn:hover {
  color: var(--text-main);
  background-color: var(--surface-subtle-hover);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-main);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
  font-weight: 600;
  transform: translateY(100px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  z-index: 200;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast .material-symbols-outlined {
  color: var(--accent-emerald-text);
}

/* Export Dialog Modal */
.export-modal {
  border: none;
  padding: 0;
  background: transparent;
  max-width: 600px;
  width: 90%;
  margin-inline: auto;
}

.export-modal::backdrop {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
}

.modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  color: var(--text-main);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-title-wrap h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--bg-surface-border);
  padding-bottom: 8px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  color: var(--text-main);
  background-color: var(--surface-subtle-hover);
}

.tab-btn.active {
  color: var(--text-main);
  background-color: var(--bg-surface-elevated);
}

.modal-body {
  background-color: var(--bg-canvas);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  max-height: 280px;
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-main);
  display: block;
  white-space: pre;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
}

@media (max-width: 1200px) {
  html, body { height: auto; overflow: visible; }
  .app-main.studio-layout { height: auto; max-height: none; overflow: visible; grid-template-columns: 1fr; }
  .column-sidebar, .column-showcase { height: auto; overflow-y: visible; padding-right: 0; }
  .sidebar-control-card { position: static; }
}

@media (max-width: 768px) {
  .app-main.studio-layout { padding: 14px; gap: 16px; }
  .mock-schedule-grid { grid-template-columns: 1fr; }
  .mock-mini-nav { flex-direction: column; align-items: stretch; }
  .mock-nav-links { justify-content: center; }
}