/* ===== qoop Demo — Apple Design System ===== */

/* Design tokens now live in static/ui/tokens.css (loaded before this file). */

/* ── Dark Mode ── */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #000000;
    --color-bg-secondary: #1D1D1F;
    --color-bg-tertiary: #2C2C2E;
    --color-bg-elevated: rgba(29, 29, 31, 0.72);
    --color-bg-grouped: #1C1C1E;
    --color-text-primary: #F5F5F7;
    --color-text-secondary: #A1A1A6;
    --color-text-tertiary: #6E6E73;
    --color-text-quaternary: #48484A;
    --color-text-placeholder: #48484A;
    --color-accent-blue: #2997FF;
    --color-accent-blue-hover: #2DA5FF;
    --color-accent-blue-active: #1A8CFF;
    --color-accent-green: #30D158;
    --color-accent-orange: #FF9F0A;
    --color-accent-red: #FF453A;
    --color-accent-purple: #BF5AF2;
    --color-accent-teal: #6AC4DC;
    --color-separator: rgba(255, 255, 255, 0.08);
    --color-separator-opaque: #38383A;
    --color-border-focus: rgba(41, 151, 255, 0.6);
    --color-fill-primary: rgba(120, 120, 128, 0.36);
    --color-fill-secondary: rgba(120, 120, 128, 0.32);
    --color-fill-tertiary: rgba(120, 120, 128, 0.24);
    --shadow-sm: 0 0 0 1px rgba(255,255,255,0.04), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 0 0 1px rgba(255,255,255,0.04), 0 2px 4px rgba(0,0,0,0.2), 0 8px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 0 0 1px rgba(255,255,255,0.04), 0 4px 8px rgba(0,0,0,0.3), 0 16px 32px rgba(0,0,0,0.4);
    --shadow-xl: 0 0 0 1px rgba(255,255,255,0.04), 0 8px 16px rgba(0,0,0,0.4), 0 32px 64px rgba(0,0,0,0.5);
  }
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-family-text);
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  min-height: 100vh;
  line-height: 1.53;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===================================================================
   APP LAYOUT
   =================================================================== */
.app {
  display: flex;
  min-height: 100vh;
}

/* ===================================================================
   SIDEBAR — Glassmorphism + Apple Nav
   =================================================================== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-bg-primary);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-right: 1px solid var(--color-separator);
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  z-index: var(--z-sidebar);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.sidebar::-webkit-scrollbar { width: 0; }

.sidebar-header {
  padding: var(--space-6) var(--space-5) var(--space-4);
  position: sticky;
  top: 0;
  background: var(--color-bg-primary);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 1;
}

.sidebar-logo {
  font-family: var(--font-family-display);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-brand-700), #3E8A9E);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-version {
  font-size: var(--font-size-footnote);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
  font-weight: 400;
}

/* Nav Sections */
.nav-section {
  padding: var(--space-1) 0;
}

.nav-section-title {
  padding: var(--space-4) var(--space-5) var(--space-2);
  font-size: var(--font-size-footnote);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-5);
  margin: 1px var(--space-2);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--font-size-body);
  font-weight: 400;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  border-radius: var(--radius-md);
  line-height: 1.4;
}

.nav-link:hover {
  background: rgba(13,30,63,0.05);
}

.nav-link.active {
  background: rgba(0, 113, 227, 0.1);
  color: var(--color-brand-700);
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .nav-link.active {
    background: rgba(41, 151, 255, 0.15);
  }
}

.nav-icon {
  font-size: 1.125rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

/* Role Indicator */
.sidebar-role-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: rgba(13,30,63,0.05);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-caption);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.role-switch-link {
  font-size: var(--font-size-footnote);
  color: var(--color-brand-700);
  text-decoration: none;
  font-weight: 600;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.role-switch-link:hover { opacity: 0.7; }

/* ===================================================================
   MAIN CONTENT
   =================================================================== */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: var(--space-10) var(--space-10) var(--space-12);
  min-height: 100vh;
  max-width: calc(100vw - var(--sidebar-width));
}

/* ===================================================================
   PAGE SECTIONS
   =================================================================== */
.page-section {
  display: none;
}

.page-section.active {
  display: block;
  animation: pageReveal var(--duration-reveal) var(--ease-out) both;
}

@keyframes pageReveal {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Page Header ===== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.page-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text-primary);
}

.page-title small {
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
  font-weight: 400;
  margin-left: var(--space-3);
  letter-spacing: 0;
}

/* ===================================================================
   BADGES
   =================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge-live {
  background: rgba(40, 205, 65, 0.12);
  color: var(--color-correct);
}

.badge-mock {
  background: rgba(255, 149, 0, 0.12);
  color: var(--color-partial);
}

.badge-info {
  background: rgba(0, 113, 227, 0.1);
  color: var(--color-brand-700);
}

.badge-error {
  background: rgba(255, 59, 48, 0.1);
  color: var(--color-incorrect);
}

.badge-success {
  background: rgba(40, 205, 65, 0.12);
  color: var(--color-correct);
}

/* ===================================================================
   CARDS — Apple Elevated Style
   =================================================================== */
.card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-separator);
}

.card-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-title);
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* ===================================================================
   FORM CONTROLS — Refined Apple Style
   =================================================================== */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-caption);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-body);
  font-family: var(--font-family-text);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-brand-700);
  box-shadow: 0 0 0 3px var(--color-brand-500);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.6;
}

.form-select {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2386868B' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

/* ===================================================================
   BUTTONS — Apple Capsule Style
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-body);
  font-weight: 400;
  font-family: var(--font-family-text);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
  line-height: 1.2;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 3px solid var(--color-brand-500);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-brand-700);
  color: var(--color-text-on-accent);
}

.btn-primary:hover {
  background: var(--color-brand-600);
}

.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: rgba(13,30,63,0.05);
  color: var(--color-brand-700);
}

.btn-secondary:hover {
  background: rgba(13,30,63,0.07);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-caption);
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   TABLES — Clean Apple List Style
   =================================================================== */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-caption);
}

th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-footnote);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--color-separator);
  background: var(--color-bg-secondary);
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-separator);
  color: var(--color-text-primary);
}

tr:last-child td { border-bottom: none; }

tr:hover td {
  background: rgba(13,30,63,0.05);
  transition: background var(--duration-fast) var(--ease-out);
}

/* ===================================================================
   STAT CARDS
   =================================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

.stat-value {
  font-family: var(--font-family-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-brand-700);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
  font-weight: 500;
}

/* ===================================================================
   SCORE RING — Apple Watch Style
   =================================================================== */
.score-ring-wrap {
  display: flex;
  justify-content: center;
  margin: var(--space-8) 0;
}

.score-ring {
  position: relative;
  width: 160px;
  height: 160px;
}

.score-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score-ring circle {
  fill: none;
  stroke-width: 10;
  stroke-linecap: round;
}

.score-ring .ring-bg { stroke: rgba(13,30,63,0.05); }

.score-ring .ring-fill {
  stroke: var(--color-brand-700);
  transition: stroke-dashoffset 1s var(--ease-out);
}

.score-ring .score-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.score-ring .score-number {
  font-family: var(--font-family-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
}

.score-ring .score-label {
  font-size: var(--font-size-footnote);
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* ===================================================================
   CRITERION BARS
   =================================================================== */
.criterion-item { margin-bottom: var(--space-4); }

.criterion-header {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-caption);
  margin-bottom: var(--space-2);
}

.criterion-name { color: var(--color-text-secondary); font-weight: 500; }
.criterion-score { color: var(--color-text-primary); font-weight: 600; font-variant-numeric: tabular-nums; }

.criterion-bar {
  height: 6px;
  background: rgba(13,30,63,0.05);
  border-radius: 3px;
  overflow: hidden;
}

.criterion-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-brand-700), #3E8A9E);
  border-radius: 3px;
  transition: width 0.8s var(--ease-out);
}

/* ===================================================================
   FEEDBACK
   =================================================================== */
.feedback-section { margin-bottom: var(--space-5); }

.feedback-title {
  font-size: var(--font-size-caption);
  font-weight: 600;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-primary);
}

.feedback-content {
  font-size: var(--font-size-caption);
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

/* ===================================================================
   SLIDER — Apple Style
   =================================================================== */
.slider-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.slider-group input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(13,30,63,0.05);
  border-radius: 2px;
  outline: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-bg-primary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15), 0 0.5px 1px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  border: 0.5px solid rgba(0, 0, 0, 0.04);
  transition: transform var(--duration-fast) var(--ease-spring);
}

.slider-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.slider-group input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
}

.slider-value {
  min-width: 44px;
  text-align: right;
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-brand-700);
  font-variant-numeric: tabular-nums;
}

/* ===================================================================
   LOADING — Glassmorphism Overlay
   =================================================================== */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-bg-primary);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xl);
  z-index: 10;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(13,30,63,0.05);
  border-top-color: var(--color-brand-700);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.loading-text {
  margin-top: var(--space-3);
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* ===================================================================
   TOAST — Floating Notification
   =================================================================== */
.toast-container {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: var(--z-toast);
}

.toast {
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-caption);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toastSlideIn var(--duration-normal) var(--ease-spring);
  min-width: 280px;
  max-width: 380px;
  color: var(--color-text-primary);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.toast-success { border-left: 4px solid var(--color-correct); }
.toast-error { border-left: 4px solid var(--color-incorrect); }
.toast-info { border-left: 4px solid var(--color-brand-700); }

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(24px) scale(0.95); }
  to { opacity: 1; transform: translateX(0) scale(1); }
}

/* ===================================================================
   GRID LAYOUTS
   =================================================================== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }

/* ===================================================================
   FILE UPLOAD
   =================================================================== */
.file-upload {
  border: 2px dashed var(--color-separator);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.file-upload:hover {
  border-color: var(--color-brand-700);
  background: rgba(0, 113, 227, 0.03);
}

.file-upload-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
}

.file-upload-text {
  font-size: var(--font-size-caption);
  line-height: 1.6;
}

/* ===================================================================
   TABS — Apple Segmented Control
   =================================================================== */
.tabs {
  display: inline-flex;
  gap: 0;
  margin-bottom: var(--space-5);
  background: rgba(13,30,63,0.05);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.tab {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-caption);
  font-weight: 500;
  color: var(--color-text-primary);
  cursor: pointer;
  border: none;
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast) var(--ease-out);
  background: transparent;
  font-family: var(--font-family-text);
}

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

.tab.active {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ===================================================================
   CELL STATUS
   =================================================================== */
.cell-correct { background: rgba(40, 205, 65, 0.1); color: var(--color-correct); }
.cell-tolerance { background: rgba(255, 149, 0, 0.1); color: var(--color-partial); }
.cell-wrong { background: rgba(255, 59, 48, 0.1); color: var(--color-incorrect); }
.cell-missing { background: rgba(13,30,63,0.05); color: var(--color-text-tertiary); }

/* ===================================================================
   STATUS INDICATOR
   =================================================================== */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: var(--space-2);
}

.status-healthy { background: var(--color-correct); box-shadow: 0 0 6px rgba(40, 205, 65, 0.4); }
.status-unhealthy { background: var(--color-incorrect); box-shadow: 0 0 6px rgba(255, 59, 48, 0.4); }
.status-unknown { background: var(--color-text-disabled); }

/* ===================================================================
   MUSIC BARS
   =================================================================== */
.music-bar { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-3); }
.music-bar-label { font-size: var(--font-size-caption); color: var(--color-text-secondary); min-width: 80px; font-weight: 500; }
.music-bar-track { flex: 1; height: 6px; background: rgba(13,30,63,0.05); border-radius: 3px; overflow: hidden; }
.music-bar-fill { height: 100%; border-radius: 3px; transition: width 0.8s var(--ease-out); }

/* ===================================================================
   ROLE OVERLAY
   =================================================================== */
.role-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pageReveal var(--duration-slow) var(--ease-out);
}

.role-overlay.hidden { display: none; }

.role-overlay.dismissing {
  animation: roleOverlayOut 0.35s var(--ease-out) forwards;
}

@keyframes roleOverlayOut {
  from { opacity: 1; transform: scale(1); }
  to { opacity: 0; transform: scale(1.02); }
}

.role-container {
  text-align: center;
  max-width: 560px;
  padding: var(--space-10) var(--space-8);
}

.role-logo {
  font-family: var(--font-family-display);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-brand-700), #3E8A9E);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.role-subtitle {
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-16, 64px);
}

.role-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-headline);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.role-description {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-10);
}

.role-cards {
  display: flex;
  gap: var(--space-5);
  justify-content: center;
}

.role-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-8) var(--space-8);
  width: 220px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
  border: 2.5px solid transparent;
  -webkit-tap-highlight-color: transparent;
}

.role-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.role-card:active { transform: scale(0.97); }

.role-card[data-role="teacher"]:hover { border-color: var(--color-brand-700); }
.role-card[data-role="student"]:hover { border-color: var(--color-correct); }

.role-card-icon { font-size: 3.5rem; margin-bottom: var(--space-4); }

.role-card-label {
  font-family: var(--font-family-display);
  font-size: var(--font-size-title-l);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.role-card-desc {
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
  line-height: 1.7;
}

/* ===================================================================
   RESPONSIVE
   =================================================================== */
@media (max-width: 1068px) {
  .grid-2,
  .grid-3 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .main { padding: var(--space-8) var(--space-6); }
}

@media (max-width: 734px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--duration-normal) var(--ease-out);
  }
  .sidebar.open { transform: translateX(0); }
  .main {
    margin-left: 0;
    padding: var(--space-5);
    max-width: 100vw;
  }
  .page-title {
    font-size: 1.5rem;
  }
}

/* ===================================================================
   ROLE-BASED VISIBILITY
   =================================================================== */
body.role-student .teacher-only { display: none !important; }

/* ===================================================================
   SCROLLBAR
   =================================================================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--color-text-disabled);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-text-tertiary); }

/* ===================================================================
   UTILITIES
   =================================================================== */
.hidden { display: none !important; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-tertiary); }
.text-sm { font-size: var(--font-size-caption); }
.text-xs { font-size: var(--font-size-footnote); }
.relative { position: relative; }
.gap-2 { gap: var(--space-2); }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.mono { font-family: var(--font-family-mono); font-size: var(--font-size-caption); }

/* ===================================================================
   SVG GRADIENT (for score ring)
   =================================================================== */
.score-ring .ring-fill {
  stroke: url(#scoreGradient);
}

/* ── Feature Intro Cards ── */
.feature-intro {
  background: linear-gradient(135deg, rgba(0, 113, 227, 0.04), rgba(89, 173, 196, 0.04));
  border: 1px solid rgba(0, 113, 227, 0.1);
  border-radius: var(--radius-card);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
}

.feature-intro .feature-title {
  font-size: var(--font-size-title-l);
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2) 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.feature-intro .feature-desc {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0 0 var(--space-4) 0;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.feature-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: var(--font-size-footnote);
  font-weight: 600;
  border-radius: 20px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-brand-700);
}

.feature-tag--green {
  background: rgba(40, 205, 65, 0.08);
  color: var(--color-correct);
}

.feature-tag--orange {
  background: rgba(255, 149, 0, 0.08);
  color: var(--color-partial);
}

.feature-tag--purple {
  background: rgba(175, 82, 222, 0.08);
  color: #7A5AA8;
}

.feature-tag--teal {
  background: rgba(89, 173, 196, 0.08);
  color: #3E8A9E;
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
}

.scenario-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  cursor: pointer;
  transition: all 0.2s ease;
}

.scenario-card:hover {
  border-color: var(--color-brand-700);
  box-shadow: 0 2px 12px rgba(0, 113, 227, 0.1);
  transform: translateY(-1px);
}

.scenario-card .scenario-label {
  font-size: var(--font-size-footnote);
  font-weight: 600;
  color: var(--color-brand-700);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-1);
}

.scenario-card .scenario-name {
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.scenario-card .scenario-desc {
  font-size: var(--font-size-caption);
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

.scenario-card .scenario-action {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--color-brand-700);
}

.scenario-card .scenario-action::after {
  content: ' →';
}