/* ============================================
   CSS CUSTOM PROPERTIES — Light & Dark themes
   ============================================ */
:root {
  --bg-primary: #f5f2ed;
  --bg-panel: rgba(255, 255, 255, 0.85);
  --bg-panel-hover: rgba(255, 255, 255, 0.95);
  --border-default: rgba(0, 0, 0, 0.08);
  --text-primary: rgba(0, 0, 0, 0.88);
  --text-secondary: rgba(0, 0, 0, 0.65);
  --text-muted: rgba(0, 0, 0, 0.50);
  --c1: #6d28d9;
  --c2: #22c55e;
  --c3: #06b6d4;
  --c4: #f59e0b;
  --c5: #ef4444;
  --c6: #8b5cf6;
  --c7: #ec4899;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.18);
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

.dark {
  --bg-primary: #0b1020;
  --bg-panel: rgba(255, 255, 255, 0.07);
  --bg-panel-hover: rgba(255, 255, 255, 0.10);
  --border-default: rgba(255, 255, 255, 0.12);
  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.70);
  --text-muted: rgba(255, 255, 255, 0.55);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.45);
}

/* ============================================
   BASE
   ============================================ */
html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* Light mode background gradients (user-facing pages only) */
body[data-theme="user"]::before {
  background:
    radial-gradient(900px 500px at 12% 10%, rgba(109, 40, 217, 0.10), transparent 60%),
    radial-gradient(700px 500px at 80% 15%, rgba(6, 182, 212, 0.10), transparent 60%),
    radial-gradient(900px 700px at 70% 85%, rgba(239, 68, 68, 0.08), transparent 65%);
}

@supports (background: color-mix(in oklab, white, black)) {
  body[data-theme="user"]::before {
    background:
      radial-gradient(900px 500px at 12% 10%, color-mix(in oklab, var(--c1) 18%, transparent), transparent 60%),
      radial-gradient(700px 500px at 80% 15%, color-mix(in oklab, var(--c3) 18%, transparent), transparent 60%),
      radial-gradient(900px 700px at 70% 85%, color-mix(in oklab, var(--c5) 14%, transparent), transparent 65%);
  }
}

.dark body[data-theme="user"]::before {
  background:
    radial-gradient(900px 500px at 12% 10%, rgba(109, 40, 217, 0.35), transparent 60%),
    radial-gradient(700px 500px at 80% 15%, rgba(6, 182, 212, 0.35), transparent 60%),
    radial-gradient(900px 700px at 70% 85%, rgba(239, 68, 68, 0.25), transparent 65%),
    linear-gradient(180deg, #070a12 0%, var(--bg-primary) 55%, #05070d 100%);
}

@supports (background: color-mix(in oklab, white, black)) {
  .dark body[data-theme="user"]::before {
    background:
      radial-gradient(900px 500px at 12% 10%, color-mix(in oklab, var(--c1) 55%, transparent), transparent 60%),
      radial-gradient(700px 500px at 80% 15%, color-mix(in oklab, var(--c3) 55%, transparent), transparent 60%),
      radial-gradient(900px 700px at 70% 85%, color-mix(in oklab, var(--c5) 45%, transparent), transparent 65%),
      linear-gradient(180deg, #070a12 0%, var(--bg-primary) 55%, #05070d 100%);
  }
}

/* Ensure main content stacks above ::before */
body > nav,
body > main,
body > footer {
  position: relative;
  z-index: 1;
}

/* ============================================
   NAV LINK
   ============================================ */
.nav-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}
.nav-link:hover {
  color: var(--c1);
}

/* ============================================
   GLASS PANEL COMPONENT
   ============================================ */
.glass {
  background: rgba(20, 25, 40, 0.85);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

@supports (backdrop-filter: blur(10px)) {
  .glass {
    background: var(--bg-panel);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
}

.glass-hover:hover {
  background: var(--bg-panel-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* Glass nav variant — no border-radius, bottom border only */
.glass-nav {
  background: rgba(20, 25, 40, 0.85);
  border-bottom: 1px solid var(--border-default);
  box-shadow: var(--shadow-md);
}

@supports (backdrop-filter: blur(10px)) {
  .glass-nav {
    background: var(--bg-panel);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
}

.user-navbar {
  position: sticky;
  top: 0;
  z-index: 50;
}

.user-navbar-row {
  min-height: 72px;
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto minmax(160px, 1fr);
  align-items: center;
  gap: 16px;
}

.user-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  text-decoration: none;
  flex: 0 0 auto;
}

.user-brand-mark {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c1), var(--c3));
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
}

.user-brand-text {
  font-size: 16px;
  font-weight: 800;
  white-space: nowrap;
}

.user-nav-scroll {
  display: flex;
  align-items: center;
  justify-self: center;
  gap: 6px;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 4px;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: color-mix(in oklab, var(--bg-panel) 72%, transparent);
}

.user-nav-scroll::-webkit-scrollbar {
  display: none;
}

.user-nav-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.user-nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-panel-hover);
}

.user-nav-link.is-active {
  color: #fff;
  background: linear-gradient(135deg,
      color-mix(in oklab, var(--c1) 80%, #111827),
      color-mix(in oklab, var(--c3) 62%, #111827));
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.20);
}

.user-navbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex: 0 0 auto;
}

.user-icon-button {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: var(--bg-panel);
  color: var(--text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.user-icon-button:hover {
  color: var(--text-primary);
  background: var(--bg-panel-hover);
  transform: translateY(-1px);
}

.user-account {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 10px;
  border-left: 1px solid var(--border-default);
}

.user-account-name {
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.user-logout {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 13px;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: var(--bg-panel);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.user-logout:hover {
  color: var(--text-primary);
  background: var(--bg-panel-hover);
}

/* ============================================
   GLOW EFFECT
   ============================================ */
.glow {
  position: relative;
  isolation: isolate;
}

.glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(from 180deg,
      var(--c1),
      var(--c3),
      var(--c5),
      var(--c2),
      var(--c1));
  filter: blur(18px);
  opacity: 0.45;
  z-index: -1;
  mix-blend-mode: screen;
  animation: glow-spin 16s linear infinite;
  will-change: transform;
}

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

@media (prefers-reduced-motion: reduce) {
  .glow::before { animation: none; }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: white;
  cursor: pointer;
  transition: filter var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  filter: brightness(1.1);
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid white;
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg,
      color-mix(in oklab, var(--c1) 70%, #111827),
      color-mix(in oklab, var(--c3) 55%, #111827));
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.btn-ghost {
  background: var(--bg-panel);
  color: var(--text-primary);
}

.btn-ghost:hover {
  background: var(--bg-panel-hover);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

/* ============================================
   BADGES & TAGS
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: rgba(34, 197, 94, 0.2);
  border: 1px solid rgba(34, 197, 94, 0.35);
  color: #16a34a;
}

.dark .badge-success {
  color: #4ade80;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #d97706;
}

.dark .badge-warning {
  color: #fbbf24;
}

.badge-error {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #dc2626;
}

.dark .badge-error {
  color: #f87171;
}

.badge-info {
  background: rgba(6, 182, 212, 0.2);
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: #0891b2;
}

.dark .badge-info {
  color: #22d3ee;
}

.badge-neutral {
  background: var(--bg-panel);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border-default);
}

/* ============================================
   FORM CONTROLS
   ============================================ */
.form-input {
  width: 100%;
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-panel);
  color: var(--text-primary);
  font-size: 14px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--c3);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

.form-input:focus-visible {
  outline: 2px solid var(--c3);
  outline-offset: 2px;
}

.form-input[aria-invalid="true"] {
  border-color: var(--c5);
}

select.form-input {
  cursor: pointer;
  appearance: auto;
}

textarea.form-input {
  height: auto;
  padding: 10px 12px;
}

/* Range input styling */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-default);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c3);
  border: 2px solid white;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

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

input[type="range"]:focus-visible {
  outline: 2px solid var(--c3);
  outline-offset: 4px;
}

/* ============================================
   QUIZ-SPECIFIC COMPONENTS
   ============================================ */
.option-label {
  transition: all 0.15s ease;
  cursor: pointer;
}

.option-label:has(input:checked) {
  border-color: var(--c1);
  background: color-mix(in oklab, var(--c1) 8%, transparent);
}

.dark .option-label:has(input:checked) {
  background: color-mix(in oklab, var(--c1) 15%, transparent);
}

.question-dot {
  transition: all 0.2s ease;
}

.question-dot:hover {
  transform: scale(1.1);
}

/* ============================================
   TOAST NOTIFICATION
   ============================================ */
.toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 1000;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-panel);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  color: var(--text-primary);
  transform: translateY(10px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* ============================================
   FLASH ALERTS
   ============================================ */
#flash-success,
#flash-error,
#flash-errors {
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px) translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0) translateX(0);
  }
}

/* ============================================
   KEYBOARD HINTS
   ============================================ */
.kbd {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================
   GLASS ITEM HOVER (for list rows inside cards)
   ============================================ */
.glass-item-hover {
  transition: background var(--transition-fast);
  cursor: pointer;
}
.glass-item-hover:hover {
  background: var(--bg-panel-hover);
}

.responsive-table {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.responsive-table table {
  min-width: 680px;
}

/* ============================================
   TEXT COLOR UTILITIES
   ============================================ */
.text-primary {
  color: var(--text-primary);
}
.text-secondary {
  color: var(--text-secondary);
}
.text-muted {
  color: var(--text-muted);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.pagination .btn {
  min-width: 40px;
  justify-content: center;
  padding: 8px 12px;
}

.pagination .btn-primary {
  pointer-events: none;
}

.pagination .ellipsis {
  padding: 8px 4px;
  color: var(--text-muted);
  font-size: 14px;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 640px) {
  :root {
    --radius-lg: 14px;
  }

  .user-navbar-row {
    min-height: auto;
    grid-template-columns: 1fr auto;
    gap: 10px;
    padding: 10px 0;
  }

  .user-brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .user-brand-text {
    font-size: 15px;
  }

  .user-nav-scroll {
    grid-column: 1 / -1;
    justify-self: stretch;
    width: 100%;
    margin-top: 2px;
  }

  .user-nav-link {
    min-height: 36px;
    padding: 0 11px;
    font-size: 12px;
  }

  .user-account-name {
    display: none;
  }

  .user-account {
    padding-left: 0;
    border-left: 0;
  }
}

/* ============================================
   TOGGLE SWITCH (Auto-sync)
   ============================================ */
.sync-toggle-label {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}
.sync-toggle-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}
.sync-toggle-track {
  width: 36px;
  height: 20px;
  background: var(--bg-panel-hover);
  border-radius: 999px;
  position: relative;
  transition: background 0.2s;
  border: 1px solid var(--border-default);
}
.sync-toggle-input:checked + .sync-toggle-track {
  background: var(--c2);
  border-color: var(--c2);
}
.sync-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.sync-toggle-input:checked + .sync-toggle-track .sync-toggle-thumb {
  transform: translateX(16px);
}

/* ============================================
   MEDIA QUERIES / PRINT
   ============================================ */
/* ============================================
   DASHBOARD COMPONENTS
   ============================================ */

/* Stat cards with gradient accent border on hover */
.stat-card {
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-accent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.stat-card:hover::after {
  opacity: 1;
}

.stat-card .stat-value {
  transition: transform var(--transition-fast);
}

.stat-card:hover .stat-value {
  transform: scale(1.05);
}

/* Quick action links */
.quick-action {
  text-decoration: none;
  color: var(--text-primary);
}

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

/* Dashboard stat icon pulse */
@keyframes icon-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

.stat-card:hover .stat-icon {
  animation: icon-pulse 1.5s ease-in-out infinite;
}

/* Animated pulse for active indicator */
.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Leaderboard medal animations */
.medal-gold,
.medal-silver,
.medal-bronze {
  transition: transform var(--transition-fast);
}

.medal-gold:hover,
.medal-silver:hover,
.medal-bronze:hover {
  transform: scale(1.2);
}

/* Welcome avatar */
@keyframes avatar-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

.w-14.h-14.rounded-full {
  animation: avatar-float 3s ease-in-out infinite;
}

/* ============================================
   MEDIA QUERIES / PRINT
   ============================================ */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  body::before { display: none !important; }

  .glass, .glass-nav {
    background: white !important;
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
  }

  .glow::before { display: none !important; }

  .btn-ghost,
  .toast,
  [data-no-print] {
    display: none !important;
  }
}