@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* ==========================================================================
   AFIRIN.NET DESIGN SYSTEM — FINTECH + EDUCATION SAAS THEME
   Primary Brand Accent: #fa470d
   ========================================================================== */

:root {
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Primary Brand Accent (Electric Orange) */
  --primary: #fa470d;
  --primary-hover: #d83a06;
  --primary-dark: #b82f03;
  --primary-tint: rgba(250, 71, 13, 0.08);
  --primary-tint-hover: rgba(250, 71, 13, 0.14);
  --primary-border: rgba(250, 71, 13, 0.25);
  --primary-gradient: linear-gradient(135deg, #fa470d 0%, #ff6230 100%);
  --primary-glow: 0 8px 20px rgba(250, 71, 13, 0.28);

  /* Light Theme Neutrals */
  --bg-main: #f7f8fc;
  --bg-card: #ffffff;
  --bg-card-hover: #fcfdfe;
  --bg-card-active: #f1f3f9;
  --bg-muted: #eef1f6;
  
  --text-main: #172033;
  --text-muted: #667085;
  --text-light: #98a2b3;
  --border-color: #e4e7ec;
  --border-subtle: #f2f4f7;
  --border-focus: #fa470d;

  /* Fintech & Education Subject Accents */
  --math-blue: #2563eb;
  --math-bg: #eff6ff;
  --math-border: #bfdbfe;

  --physics-purple: #7c3aed;
  --physics-bg: #f5f3ff;
  --physics-border: #ddd6fe;

  --chem-cyan: #0891b2;
  --chem-bg: #ecfeff;
  --chem-border: #a5f3fc;

  --bio-green: #059669;
  --bio-bg: #ecfdf5;
  --bio-border: #a7f3d0;

  --acct-amber: #d97706;
  --acct-bg: #fffbeb;
  --acct-border: #fde68a;

  --eng-rose: #e11d48;
  --eng-bg: #fff1f2;
  --eng-border: #fecdd3;

  --cs-indigo: #4f46e5;
  --cs-bg: #eef2ff;
  --cs-border: #c7d2fe;

  /* Status Colors */
  --success: #10b981;
  --success-bg: #ecfdf5;
  --success-text: #065f46;
  --success-border: #a7f3d0;

  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --warning-text: #92400e;
  --warning-border: #fde68a;

  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --danger-text: #991b1b;
  --danger-border: #fecaca;

  --info: #3b82f6;
  --info-bg: #eff6ff;
  --info-text: #1e40af;
  --info-border: #bfdbfe;

  /* Dashboard Shell */
  --sidebar-bg: #0d1424;
  --sidebar-border: rgba(255, 255, 255, 0.07);
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-hover: rgba(255, 255, 255, 0.05);
  --sidebar-active-bg: rgba(250, 71, 13, 0.15);
  --sidebar-active-border: #fa470d;
  
  --topbar-bg: #ffffff;
  --topbar-border: #e4e7ec;

  /* Border Radii */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-card: 18px;
  --radius-card-lg: 22px;
  --radius-full: 9999px;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-sm: 0 2px 4px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 6px 16px -2px rgba(16, 24, 40, 0.08), 0 2px 4px -1px rgba(16, 24, 40, 0.04);
  --shadow-lg: 0 14px 28px -4px rgba(16, 24, 40, 0.1), 0 6px 12px -2px rgba(16, 24, 40, 0.05);
  --shadow-card: 0 2px 10px rgba(16, 24, 40, 0.04);
  --shadow-card-hover: 0 12px 24px -6px rgba(16, 24, 40, 0.09), 0 4px 8px -2px rgba(16, 24, 40, 0.03);
}

/* ==========================================================================
   DARK THEME TOKENS
   Deep Navy/Slate (#0b111e, #141c2e) with #fa470d Brand Accent
   ========================================================================== */

[data-theme="dark"] {
  --bg-main: #0b111e;
  --bg-card: #141c2e;
  --bg-card-hover: #1b253b;
  --bg-card-active: #232f4a;
  --bg-muted: #182236;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --border-color: #1e293b;
  --border-subtle: #162035;

  --sidebar-bg: #080d17;
  --sidebar-border: #162035;
  --topbar-bg: #141c2e;
  --topbar-border: #1e293b;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 14px 28px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 12px 24px rgba(0, 0, 0, 0.5);

  --success-bg: rgba(16, 185, 129, 0.12);
  --success-text: #34d399;
  --success-border: rgba(16, 185, 129, 0.3);

  --warning-bg: rgba(245, 158, 11, 0.12);
  --warning-text: #fbbf24;
  --warning-border: rgba(245, 158, 11, 0.3);

  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-text: #f87171;
  --danger-border: rgba(239, 68, 68, 0.3);

  --info-bg: rgba(59, 130, 246, 0.12);
  --info-text: #60a5fa;
  --info-border: rgba(59, 130, 246, 0.3);

  --math-bg: rgba(37, 99, 235, 0.12);
  --physics-bg: rgba(124, 58, 237, 0.12);
  --chem-bg: rgba(8, 145, 178, 0.12);
  --bio-bg: rgba(5, 150, 105, 0.12);
  --acct-bg: rgba(217, 119, 6, 0.12);
  --eng-bg: rgba(225, 29, 72, 0.12);
  --cs-bg: rgba(79, 70, 229, 0.12);
}

/* ==========================================================================
   BASE & RESET
   ========================================================================== */

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.2s ease;
}
a:hover {
  color: var(--primary-hover);
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

button, input, select, textarea {
  font-family: inherit;
}

/* ==========================================================================
   BUTTON SYSTEM (Rounded 10-14px, Accessible, Micro-animated)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  line-height: 1.35;
  user-select: none;
}

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

/* Primary Orange CTA */
.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(250, 71, 13, 0.28);
  border-color: transparent;
}
.btn-primary:hover {
  background: linear-gradient(135deg, #e03c08 0%, #fa470d 100%);
  box-shadow: 0 6px 18px rgba(250, 71, 13, 0.38);
  transform: translateY(-1px);
}

/* Secondary Neutral */
.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main) !important;
  border-color: var(--border-color);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

/* Exam Mode Red */
.btn-exam {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}
.btn-exam:hover {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

/* Success Green */
.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}
.btn-success:hover {
  transform: translateY(-1px);
}

/* Danger Red */
.btn-danger {
  background-color: var(--danger-bg);
  color: var(--danger-text) !important;
  border-color: var(--danger-border);
}
.btn-danger:hover {
  background-color: #fee2e2;
  color: #991b1b !important;
}

/* Outline Buttons */
.btn-outline-primary {
  background: transparent;
  color: var(--primary) !important;
  border-color: var(--primary-border);
}
.btn-outline-primary:hover {
  background: var(--primary-tint);
  border-color: var(--primary);
}

/* Sizes */
.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
  font-weight: 700;
}

.btn-block {
  width: 100%;
}

.btn-xs {
  padding: 4px 8px;
  font-size: 0.72rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  line-height: 1.3;
}

.action-btn-primary {
  background: rgba(250, 71, 13, 0.1);
  color: var(--primary) !important;
  border-color: rgba(250, 71, 13, 0.25);
}
.action-btn-primary:hover {
  background: var(--primary);
  color: #ffffff !important;
}

.action-btn-secondary {
  background: var(--bg-card);
  color: var(--text-muted) !important;
  border-color: var(--border-color);
}
.action-btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text-main) !important;
}

.action-btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626 !important;
  border-color: rgba(239, 68, 68, 0.25);
}
.action-btn-danger:hover {
  background: #dc2626;
  color: #ffffff !important;
}

.action-btn-success {
  background: rgba(16, 185, 129, 0.1);
  color: #059669 !important;
  border-color: rgba(16, 185, 129, 0.25);
}
.action-btn-success:hover {
  background: #10b981;
  color: #ffffff !important;
}

/* ==========================================================================
   CARDS & CONTAINERS (16px–22px Radius)
   ========================================================================== */

.card {
  background-color: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  padding: 24px;
  margin-bottom: 24px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.card:hover {
  box-shadow: var(--shadow-card-hover);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.card-subtitle {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Stat KPI Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}
.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--primary-border);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  flex-shrink: 0;
}
.stat-icon.orange { background: rgba(250, 71, 13, 0.12); color: #fa470d; }
.stat-icon.blue { background: #eff6ff; color: #2563eb; }
.stat-icon.purple { background: #f5f3ff; color: #7c3aed; }
.stat-icon.cyan { background: #ecfeff; color: #0891b2; }
.stat-icon.emerald { background: #ecfdf5; color: #059669; }
.stat-icon.amber { background: #fffbeb; color: #d97706; }
.stat-icon.rose { background: #fff1f2; color: #e11d48; }

.stat-content {
  flex: 1;
}
.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
}

/* Mode Banner Callouts */
.section-banner {
  border-radius: var(--radius-card);
  padding: 26px 30px;
  margin-bottom: 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  position: relative;
  overflow: hidden;
}

.section-banner-exam {
  background: linear-gradient(135deg, #1e1b4b 0%, #2e1065 100%);
  color: #ffffff;
  border-left: 6px solid #ef4444;
  box-shadow: 0 10px 25px rgba(239, 68, 68, 0.18);
}
.section-banner-exam h2, .section-banner-exam p {
  color: #ffffff;
}

.section-banner-practice {
  background: linear-gradient(135deg, #0d1424 0%, #1e293b 100%);
  color: #ffffff;
  border-left: 6px solid #fa470d;
  box-shadow: 0 10px 25px rgba(250, 71, 13, 0.18);
}
.section-banner-practice h2, .section-banner-practice p {
  color: #ffffff;
}

/* ==========================================================================
   BADGES & PILLS
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 11px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: capitalize;
  line-height: 1.3;
}

.badge-primary { background: var(--primary-tint); color: var(--primary); border: 1px solid var(--primary-border); }
.badge-admin { background-color: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.badge-student { background-color: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.badge-parent { background-color: #fffbeb; color: #b45309; border: 1px solid #fde68a; }

.badge-active { background-color: var(--success-bg); color: var(--success-text); border: 1px solid var(--success-border); }
.badge-pending { background-color: var(--warning-bg); color: var(--warning-text); border: 1px solid var(--warning-border); }
.badge-rejected { background-color: var(--danger-bg); color: var(--danger-text); border: 1px solid var(--danger-border); }
.badge-inactive { background-color: var(--bg-muted); color: var(--text-muted); border: 1px solid var(--border-color); }

.badge-exam { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; font-weight: 800; }
.badge-practice { background: rgba(250, 71, 13, 0.1); color: #fa470d; border: 1px solid rgba(250, 71, 13, 0.3); font-weight: 800; }

.badge-level-o { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; font-weight: 700; }
.badge-level-a { background: #f5f3ff; color: #6d28d9; border: 1px solid #ddd6fe; font-weight: 700; }

.badge-diff-easy { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.badge-diff-medium { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.badge-diff-hard { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ==========================================================================
   FORMS & INPUTS (Fintech Polished, Orange Focus Rings)
   ========================================================================== */

.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-control, .form-select, textarea.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  color: var(--text-main);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  line-height: 1.5;
}

.form-control::placeholder {
  color: var(--text-light);
}

.form-control:focus, .form-select:focus, textarea.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-tint);
}

.form-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-error {
  font-size: 0.82rem;
  color: var(--danger-text);
  margin-top: 6px;
  font-weight: 600;
}

/* Custom Checkbox */
.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.form-check input[type="checkbox"], .form-check input[type="radio"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  cursor: pointer;
}
.form-check-label {
  font-size: 0.9rem;
  color: var(--text-main);
  cursor: pointer;
  user-select: none;
}

/* ==========================================================================
   TABLES (Clean Fintech SaaS Rows, No Ugly Text Links)
   ========================================================================== */

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-card);
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  text-align: left;
}

.table th {
  padding: 14px 18px;
  background-color: var(--bg-muted);
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 0.91rem;
  vertical-align: middle;
  background-color: var(--bg-card);
  transition: background-color 0.15s ease;
}

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

.table tr:hover td {
  background-color: var(--bg-card-hover);
}

.action-btn-group {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.action-btn {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  transition: all 0.2s;
}
.action-btn:hover {
  background: var(--bg-muted);
  border-color: var(--text-muted);
}
.action-btn-primary {
  border-color: var(--primary-border);
  color: var(--primary);
  background: var(--primary-tint);
}
.action-btn-primary:hover {
  background: var(--primary);
  color: #ffffff;
}

/* ==========================================================================
   ALERTS & EMPTY STATES
   ========================================================================== */

.alert {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-xs);
}

.alert-success {
  background-color: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
}
.alert-error {
  background-color: var(--danger-bg);
  color: var(--danger-text);
  border: 1px solid var(--danger-border);
}
.alert-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
}
.alert-info {
  background-color: var(--info-bg);
  color: var(--info-text);
  border: 1px solid var(--info-border);
}

.empty-state {
  text-align: center;
  padding: 60px 24px;
}
.empty-state-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--primary-tint);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px auto;
}
.empty-state-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.empty-state-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  max-width: 420px;
  margin: 0 auto 24px auto;
}

/* ==========================================================================
   PRACTICE & EXAM RUNNER UI (Distraction-free, Clear Feedback)
   ========================================================================== */

.practice-container, .exam-container {
  max-width: 860px;
  margin: 0 auto;
}

.runner-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

/* Progress bar in brand orange */
.progress-container {
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  height: 10px;
  overflow: hidden;
  position: relative;
  margin: 14px 0 24px 0;
}
.progress-bar-primary {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--primary-gradient);
  transition: width 0.4s ease;
  box-shadow: 0 0 12px rgba(250, 71, 13, 0.4);
}

/* Clickable MCQ Option Cards */
.option-label {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  border-radius: var(--radius-card);
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  margin-bottom: 14px;
  position: relative;
  user-select: none;
}

.option-label:hover {
  border-color: var(--primary);
  background-color: var(--primary-tint);
  transform: translateX(4px);
}

.option-label.selected {
  border-color: var(--primary);
  background-color: var(--primary-tint);
  box-shadow: 0 4px 14px rgba(250, 71, 13, 0.2);
}

.option-label.correct {
  border-color: var(--success) !important;
  background-color: var(--success-bg) !important;
  color: var(--success-text) !important;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.2);
}

.option-label.incorrect {
  border-color: var(--danger) !important;
  background-color: var(--danger-bg) !important;
  color: var(--danger-text) !important;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.2);
}

.option-key {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  background: var(--bg-muted);
  color: var(--text-main);
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.option-label:hover .option-key,
.option-label.selected .option-key {
  background: var(--primary);
  color: #ffffff;
}

.option-label.correct .option-key {
  background: var(--success);
  color: #ffffff;
}

.option-label.incorrect .option-key {
  background: var(--danger);
  color: #ffffff;
}

.option-text {
  font-size: 1.05rem;
  color: var(--text-main);
  font-weight: 500;
  line-height: 1.5;
}

/* Exam Timer Pill */
.exam-timer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: #fef2f2;
  color: #dc2626;
  font-weight: 800;
  font-size: 1.1rem;
  border: 1px solid #fecaca;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.exam-timer.urgent {
  animation: pulse 1s infinite;
  background: #dc2626;
  color: #ffffff;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.04); }
  100% { transform: scale(1); }
}

/* Score Visual Cards */
.score-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px auto;
  border: 8px solid var(--primary);
  box-shadow: 0 8px 24px rgba(250, 71, 13, 0.25);
  background: var(--bg-card);
}
.score-circle-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

/* ==========================================================================
   LEADERBOARDS
   ========================================================================== */

.rank-badge {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
}
.rank-1 {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
  position: relative;
}
.rank-2 {
  background: linear-gradient(135deg, #cbd5e1, #94a3b8);
  color: #ffffff;
}
.rank-3 {
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #ffffff;
}
.rank-other {
  background: var(--bg-muted);
  color: var(--text-muted);
}

/* ==========================================================================
   AUTHENTICATION SPLIT LAYOUT
   ========================================================================== */

.auth-page {
  min-height: 100vh;
  display: flex;
  background-color: var(--bg-main);
}

.auth-split-container {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

.auth-left-brand {
  flex: 1;
  background: radial-gradient(circle at 20% 20%, rgba(250, 71, 13, 0.3) 0%, transparent 60%),
              linear-gradient(135deg, #0d1424 0%, #162238 100%);
  color: #ffffff;
  padding: 60px 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.auth-left-brand::before {
  content: '';
  position: absolute;
  top: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(250, 71, 13, 0.15);
  filter: blur(80px);
  pointer-events: none;
}

.auth-right-form {
  width: 520px;
  max-width: 100%;
  background-color: var(--bg-card);
  padding: 60px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 10;
}

.auth-brand-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(250, 71, 13, 0.2);
  color: #ff8c66;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 24px;
  border: 1px solid rgba(250, 71, 13, 0.35);
}

.auth-feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}
.auth-feature-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.95rem;
  color: #cbd5e1;
}
.auth-feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(250, 71, 13, 0.18);
  color: #fa470d;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}

/* Centered Auth Card (Forgot/Reset Password) */
.auth-card-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  background-color: var(--bg-main);
  background-image: radial-gradient(circle at 50% 15%, rgba(250, 71, 13, 0.08) 0%, transparent 60%);
}
.auth-card {
  width: 100%;
  max-width: 460px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

/* ==========================================================================
   GLOBAL APP DASHBOARD SHELL
   ========================================================================== */

.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 270px;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 50;
  border-right: 1px solid var(--sidebar-border);
}

.sidebar-header {
  padding: 22px 20px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--sidebar-border);
}

.brand-badge {
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 800;
  font-size: 1.25rem;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(250, 71, 13, 0.4);
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  padding: 16px 14px 6px 14px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--sidebar-text);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--sidebar-text-active);
  background-color: var(--sidebar-hover);
}

/* Active navigation item with orange tint and solid orange indicator */
.nav-link.active {
  color: #ffffff;
  background-color: var(--sidebar-active-bg);
  border-left: 4px solid var(--sidebar-active-border);
  font-weight: 700;
  padding-left: 10px;
}
.nav-link.active svg {
  color: var(--primary);
}

/* Main Content & Topbar */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-main);
}

.topbar {
  height: 70px;
  background-color: var(--topbar-bg);
  border-bottom: 1px solid var(--topbar-border);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-xs);
  position: sticky;
  top: 0;
  z-index: 30;
}

.page-body {
  padding: 32px;
  flex: 1;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}

/* Theme Switcher Button */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}
.theme-toggle-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: scale(1.05);
}

/* ==========================================================================
   SUBJECT CARDS (Colorful & Educational)
   ========================================================================== */

.subject-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.subject-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.subject-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--primary));
}

.subject-card.math { --card-accent: var(--math-blue); }
.subject-card.physics { --card-accent: var(--physics-purple); }
.subject-card.chem { --card-accent: var(--chem-cyan); }
.subject-card.bio { --card-accent: var(--bio-green); }
.subject-card.acct { --card-accent: var(--acct-amber); }
.subject-card.eng { --card-accent: var(--eng-rose); }
.subject-card.cs { --card-accent: var(--cs-indigo); }

/* ==========================================================================
   PUBLIC LANDING PAGE HERO & FLOATING MOCKUP
   ========================================================================== */

.landing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  max-width: 1380px;
  margin: 0 auto;
}

.hero-section {
  max-width: 1380px;
  margin: 40px auto 70px auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--primary-tint);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 24px;
  border: 1px solid var(--primary-border);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 20px;
}
.hero-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 32px;
}

/* Interactive Educational Dashboard Visual (CSS Only) */
.hero-visual-board {
  background: linear-gradient(135deg, #0d1424 0%, #172238 100%);
  border-radius: var(--radius-card-lg);
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 40px -10px rgba(13, 20, 36, 0.4);
  position: relative;
}

.floating-kpi-card {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  padding: 18px 22px;
  color: #ffffff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: transform 0.3s ease;
}
.floating-kpi-card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.12);
}

/* ==========================================================================
   MOBILE & RESPONSIVE BREAKPOINTS (360px, 390px, 430px, 768px, 1024px)
   ========================================================================== */

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  z-index: 40;
}
.sidebar-overlay.active {
  display: block;
}

@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 24px;
  }
}

@media (max-width: 768px) {
  .landing-nav {
    padding: 16px 20px;
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-desc {
    font-size: 1.05rem;
  }
  
  .auth-split-container {
    flex-direction: column;
  }
  .auth-left-brand {
    display: none;
  }
  .auth-right-form {
    width: 100%;
    padding: 36px 20px;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    height: 100vh;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .topbar {
    padding: 0 16px;
  }
  .page-body {
    padding: 18px 14px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .option-label {
    padding: 14px 16px;
  }
}

/* ==========================================================================
   UTILITY COMPATIBILITY & SAAS DASHBOARD HELPERS
   Bridges existing view markup to modern design system tokens
   ========================================================================== */

.flex { display: flex !important; }
.inline-flex { display: inline-flex !important; }
.flex-col { flex-direction: column !important; }
.flex-row { flex-direction: row !important; }
.items-center { align-items: center !important; }
.items-start { align-items: flex-start !important; }
.items-end { align-items: flex-end !important; }
.items-baseline { align-items: baseline !important; }
.justify-between { justify-content: space-between !important; }
.justify-center { justify-content: center !important; }
.justify-end { justify-content: flex-end !important; }
.shrink-0 { flex-shrink: 0 !important; }
.grow { flex-grow: 1 !important; }
.flex-1 { flex: 1 1 0% !important; }
.flex-wrap { flex-wrap: wrap !important; }

.gap-1 { gap: 4px !important; }
.gap-2 { gap: 8px !important; }
.gap-3 { gap: 12px !important; }
.gap-4 { gap: 16px !important; }
.gap-5 { gap: 20px !important; }
.gap-6 { gap: 24px !important; }
.gap-8 { gap: 32px !important; }

.grid { display: grid !important; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)) !important; }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)) !important; }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)) !important; }

@media (min-width: 768px) {
  .md\:flex-row { flex-direction: row !important; }
  .md\:items-center { align-items: center !important; }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)) !important; }
  .lg\:col-span-2 { grid-column: span 2 / span 2 !important; }
  .lg\:col-span-3 { grid-column: span 3 / span 3 !important; }
}

.space-y-1 > :not([hidden]) ~ :not([hidden]) { margin-top: 4px !important; }
.space-y-2 > :not([hidden]) ~ :not([hidden]) { margin-top: 8px !important; }
.space-y-3 > :not([hidden]) ~ :not([hidden]) { margin-top: 12px !important; }
.space-y-4 > :not([hidden]) ~ :not([hidden]) { margin-top: 16px !important; }
.space-y-6 > :not([hidden]) ~ :not([hidden]) { margin-top: 24px !important; }
.space-y-8 > :not([hidden]) ~ :not([hidden]) { margin-top: 32px !important; }

.p-2 { padding: 8px !important; }
.p-3 { padding: 12px !important; }
.p-4 { padding: 16px !important; }
.p-5 { padding: 20px !important; }
.p-6 { padding: 24px !important; }
.px-2 { padding-left: 8px !important; padding-right: 8px !important; }
.px-2\.5 { padding-left: 10px !important; padding-right: 10px !important; }
.px-3 { padding-left: 12px !important; padding-right: 12px !important; }
.px-4 { padding-left: 16px !important; padding-right: 16px !important; }
.px-5 { padding-left: 20px !important; padding-right: 20px !important; }
.px-6 { padding-left: 24px !important; padding-right: 24px !important; }
.py-0\.5 { padding-top: 2px !important; padding-bottom: 2px !important; }
.py-1 { padding-top: 4px !important; padding-bottom: 4px !important; }
.py-2 { padding-top: 8px !important; padding-bottom: 8px !important; }
.py-2\.5 { padding-top: 10px !important; padding-bottom: 10px !important; }
.py-3 { padding-top: 12px !important; padding-bottom: 12px !important; }
.py-4 { padding-top: 16px !important; padding-bottom: 16px !important; }
.py-10 { padding-top: 40px !important; padding-bottom: 40px !important; }

.mt-1 { margin-top: 4px !important; }
.mt-2 { margin-top: 8px !important; }
.mt-3 { margin-top: 12px !important; }
.mt-4 { margin-top: 16px !important; }
.mt-6 { margin-top: 24px !important; }
.mb-2 { margin-bottom: 8px !important; }
.mb-4 { margin-bottom: 16px !important; }
.mb-6 { margin-bottom: 24px !important; }

.w-full { width: 100% !important; }
.w-4 { width: 16px !important; }
.h-4 { height: 16px !important; }
.w-5 { width: 20px !important; }
.h-5 { height: 20px !important; }
.w-6 { width: 24px !important; }
.h-6 { height: 24px !important; }
.w-8 { width: 32px !important; }
.h-8 { height: 32px !important; }
.w-10 { width: 40px !important; }
.h-10 { height: 40px !important; }
.w-12 { width: 48px !important; }
.h-12 { height: 48px !important; }
.w-16 { width: 64px !important; }
.h-16 { height: 64px !important; }

.rounded-lg { border-radius: var(--radius-sm) !important; }
.rounded-xl { border-radius: var(--radius-md) !important; }
.rounded-2xl { border-radius: var(--radius-card) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

.border { border: 1px solid var(--border-color) !important; }
.border-b { border-bottom: 1px solid var(--border-color) !important; }
.border-t { border-top: 1px solid var(--border-color) !important; }
.border-slate-200 { border-color: var(--border-color) !important; }
.border-slate-300 { border-color: var(--border-color) !important; }
.border-slate-100 { border-color: var(--border-subtle) !important; }

.bg-white { background-color: var(--bg-card) !important; }
.bg-slate-50 { background-color: var(--bg-muted) !important; }
.bg-slate-100 { background-color: var(--bg-muted) !important; }
.bg-slate-200 { background-color: var(--border-color) !important; }

.bg-indigo-50 { background-color: var(--info-bg) !important; }
.bg-indigo-100 { background-color: var(--info-bg) !important; }
.bg-indigo-600 { background-color: var(--info) !important; }
.bg-emerald-50 { background-color: var(--success-bg) !important; }
.bg-emerald-100 { background-color: var(--success-bg) !important; }
.bg-rose-50 { background-color: var(--danger-bg) !important; }
.bg-rose-100 { background-color: var(--danger-bg) !important; }
.bg-amber-50 { background-color: var(--warning-bg) !important; }
.bg-amber-100 { background-color: var(--warning-bg) !important; }

.text-slate-900 { color: var(--text-main) !important; }
.text-slate-800 { color: var(--text-main) !important; }
.text-slate-700 { color: var(--text-main) !important; }
.text-slate-600 { color: var(--text-muted) !important; }
.text-slate-500 { color: var(--text-muted) !important; }
.text-slate-400 { color: var(--text-light) !important; }
.text-white { color: #ffffff !important; }

.text-indigo-600 { color: var(--info) !important; }
.text-indigo-700 { color: var(--info-text) !important; }
.text-emerald-500, .text-emerald-600 { color: var(--success) !important; }
.text-rose-500, .text-rose-600 { color: var(--danger) !important; }
.text-amber-500 { color: var(--warning) !important; }

.text-xs { font-size: 0.75rem !important; line-height: 1rem !important; }
.text-sm { font-size: 0.875rem !important; line-height: 1.25rem !important; }
.text-base { font-size: 1rem !important; line-height: 1.5rem !important; }
.text-lg { font-size: 1.125rem !important; line-height: 1.75rem !important; }
.text-xl { font-size: 1.25rem !important; line-height: 1.75rem !important; }
.text-2xl { font-size: 1.5rem !important; line-height: 2rem !important; }
.text-3xl { font-size: 1.875rem !important; line-height: 2.25rem !important; }
.text-4xl { font-size: 2.25rem !important; line-height: 2.5rem !important; }

.font-medium { font-weight: 500 !important; }
.font-semibold { font-weight: 600 !important; }
.font-bold { font-weight: 700 !important; }
.font-black { font-weight: 800 !important; }
.uppercase { text-transform: uppercase !important; }
.tracking-wider { letter-spacing: 0.05em !important; }
.tracking-tight { letter-spacing: -0.02em !important; }
.font-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace !important; }

/* Dark mode utility overrides */
[data-theme="dark"] .dark\:bg-slate-900 { background-color: var(--bg-card) !important; }
[data-theme="dark"] .dark\:bg-slate-800 { background-color: var(--bg-card-hover) !important; }
[data-theme="dark"] .dark\:bg-slate-800\/60 { background-color: var(--bg-muted) !important; }
[data-theme="dark"] .dark\:bg-slate-800\/30 { background-color: var(--bg-muted) !important; }
[data-theme="dark"] .dark\:border-slate-800 { border-color: var(--border-color) !important; }
[data-theme="dark"] .dark\:border-slate-700 { border-color: var(--border-color) !important; }
[data-theme="dark"] .dark\:text-white { color: #f8fafc !important; }
[data-theme="dark"] .dark\:text-slate-200 { color: #e2e8f0 !important; }
[data-theme="dark"] .dark\:text-slate-300 { color: #cbd5e1 !important; }
[data-theme="dark"] .dark\:text-slate-400 { color: #94a3b8 !important; }