/* ==========================================================================
   EduKids — Comprehensive Design System
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Google Font Import & CSS Custom Properties
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Brand Colors */
  --clr-primary: #6C63FF;
  --clr-primary-light: #8B85FF;
  --clr-primary-dark: #4B44D6;
  --clr-primary-glow: rgba(108, 99, 255, 0.35);

  --clr-secondary: #00D4AA;
  --clr-secondary-light: #00EDBE;
  --clr-secondary-dark: #00A882;
  --clr-secondary-glow: rgba(0, 212, 170, 0.3);

  --clr-accent: #FFB347;
  --clr-accent-light: #FFC87A;
  --clr-accent-dark: #E09000;
  --clr-accent-glow: rgba(255, 179, 71, 0.3);

  --clr-danger: #FF6B6B;
  --clr-danger-light: #FF9090;
  --clr-danger-dark: #D44;
  --clr-danger-glow: rgba(255, 107, 107, 0.3);

  --clr-success: #4ADE80;
  --clr-success-glow: rgba(74, 222, 128, 0.3);
  --clr-warning: #FCD34D;
  --clr-warning-glow: rgba(252, 211, 77, 0.3);
  --clr-info: #38BDF8;

  /* Admin colors */
  --clr-admin: #F472B6;
  --clr-teacher: #6C63FF;
  --clr-parent: #00D4AA;
  --clr-student: #FFB347;

  /* Background System */
  --clr-bg: #080816;
  --clr-bg-2: #0F0F23;
  --clr-bg-3: #141430;
  --clr-surface: rgba(255, 255, 255, 0.045);
  --clr-surface-2: rgba(255, 255, 255, 0.07);
  --clr-surface-hover: rgba(255, 255, 255, 0.10);
  --clr-border: rgba(255, 255, 255, 0.08);
  --clr-border-bright: rgba(255, 255, 255, 0.18);

  /* Text */
  --clr-text: #E8EAF0;
  --clr-text-muted: #7C85A2;
  --clr-text-faint: #4A5168;
  --clr-text-on-primary: #ffffff;

  /* Typography */
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.85rem;
  --font-size-base: 1rem;
  --font-size-md: 1.1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 1.875rem;
  --font-size-3xl: 2.25rem;
  --font-size-4xl: 3rem;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-primary: 0 4px 20px var(--clr-primary-glow);
  --shadow-secondary: 0 4px 20px var(--clr-secondary-glow);

  /* Layout */
  --sidebar-width: 268px;
  --header-height: 64px;
  --content-max-width: 1200px;

  /* Transitions */
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.045);
  --glass-blur: blur(20px);
  --glass-border: 1px solid rgba(255,255,255,0.08);
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--clr-text);
  background: var(--clr-bg);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--clr-primary-light); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--clr-primary); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font-family); border: none; outline: none; }
input, textarea, select { font-family: var(--font-family); outline: none; }
ul, ol { list-style: none; }

/* --------------------------------------------------------------------------
   3. Splash Screen
   -------------------------------------------------------------------------- */
.splash-screen {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(108,99,255,0.25) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(0,212,170,0.2) 0%, transparent 60%),
              var(--clr-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: splashFade 0.8s ease 1.8s forwards;
}

.splash-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-10);
}

.splash-icon-wrapper {
  width: 96px;
  height: 96px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  box-shadow: 0 0 60px var(--clr-primary-glow);
  animation: splashPulse 1.5s ease-in-out infinite;
  margin: 0 auto;
}

.splash-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  margin-top: var(--space-4);
}

.splash-tagline {
  color: var(--clr-text-muted);
  font-size: var(--font-size-md);
  font-weight: 400;
  margin-top: var(--space-2);
}

.splash-loader { width: 240px; }
.loader-bar {
  height: 4px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.loader-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary));
  border-radius: var(--radius-full);
  animation: loaderFill 1.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.loader-text {
  margin-top: var(--space-3);
  color: var(--clr-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

@keyframes splashPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 60px var(--clr-primary-glow); }
  50% { transform: scale(1.05); box-shadow: 0 0 80px var(--clr-primary-glow); }
}
@keyframes loaderFill { to { width: 100%; } }
@keyframes splashFade { to { opacity: 0; pointer-events: none; } }

/* --------------------------------------------------------------------------
   4. App Layout (Authenticated)
   -------------------------------------------------------------------------- */
.app-layout {
  display: flex;
  min-height: 100vh;
  background: radial-gradient(ellipse at 0% 0%, rgba(108,99,255,0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 100% 100%, rgba(0,212,170,0.08) 0%, transparent 50%),
              var(--clr-bg);
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--clr-bg-2);
  border-right: var(--glass-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-header {
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-bottom: var(--glass-border);
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: var(--shadow-primary);
}

.sidebar-brand {
  font-size: var(--font-size-lg);
  font-weight: 800;
  background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-user-card {
  margin: var(--space-4) var(--space-4) 0;
  padding: var(--space-4);
  background: var(--clr-surface);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
}

.sidebar-user-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.sidebar-user-info { margin-top: var(--space-3); }
.sidebar-user-name {
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--clr-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-role {
  font-size: var(--font-size-xs);
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-top: 2px;
}

.role-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.role-badge.admin { background: rgba(244,114,182,0.15); color: var(--clr-admin); }
.role-badge.teacher { background: rgba(108,99,255,0.15); color: var(--clr-teacher); }
.role-badge.parent { background: rgba(0,212,170,0.15); color: var(--clr-parent); }
.role-badge.student { background: rgba(255,179,71,0.15); color: var(--clr-student); }

.sidebar-nav {
  flex: 1;
  padding: var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.nav-section-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--clr-text-faint);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: var(--space-3) var(--space-3) var(--space-2);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--clr-text-muted);
  font-weight: 500;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid transparent;
  position: relative;
  user-select: none;
}

.nav-item:hover {
  background: var(--clr-surface);
  color: var(--clr-text);
  border-color: var(--clr-border);
}

.nav-item.active {
  background: linear-gradient(135deg, rgba(108,99,255,0.2), rgba(0,212,170,0.1));
  color: var(--clr-primary-light);
  border-color: rgba(108,99,255,0.3);
  font-weight: 600;
}

.nav-item.active .nav-icon { filter: none; }
.nav-icon { font-size: 18px; width: 22px; text-align: center; }

.nav-badge {
  margin-left: auto;
  background: var(--clr-danger);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  min-width: 18px;
  text-align: center;
  animation: badgePop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes badgePop {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.sidebar-footer {
  padding: var(--space-4);
  border-top: var(--glass-border);
}

.btn-logout {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(255,107,107,0.08);
  color: var(--clr-danger);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  border: 1px solid rgba(255,107,107,0.15);
}
.btn-logout:hover { background: rgba(255,107,107,0.15); border-color: rgba(255,107,107,0.3); }

/* Main Content Area */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Top Header Bar */
.top-header {
  height: var(--header-height);
  background: rgba(8,8,22,0.8);
  backdrop-filter: blur(16px);
  border-bottom: var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-header-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--clr-text);
}

.top-header-actions { display: flex; align-items: center; gap: var(--space-4); }

.notification-btn {
  position: relative;
  width: 40px;
  height: 40px;
  background: var(--clr-surface);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--clr-text-muted);
}
.notification-btn:hover { background: var(--clr-surface-2); color: var(--clr-text); }

.notif-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--clr-danger);
  color: white;
  font-size: 9px;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--clr-bg);
}

/* Page Content */
.page-content {
  padding: var(--space-8);
  max-width: var(--content-max-width);
  margin: 0 auto;
  width: 100%;
  flex: 1;
}

.page-header {
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--clr-text);
  line-height: 1.2;
}

.page-subtitle {
  color: var(--clr-text-muted);
  font-size: var(--font-size-md);
  margin-top: var(--space-2);
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   5. Auth Layout (Login / Register)
   -------------------------------------------------------------------------- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 20% 20%, rgba(108,99,255,0.25) 0%, transparent 55%),
              radial-gradient(ellipse at 80% 80%, rgba(0,212,170,0.2) 0%, transparent 55%),
              radial-gradient(ellipse at 60% 10%, rgba(255,179,71,0.1) 0%, transparent 40%),
              var(--clr-bg);
  padding: var(--space-8) var(--space-4);
}

.auth-container {
  width: 100%;
  max-width: 480px;
}

.auth-brand {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-logo {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto var(--space-4);
  box-shadow: var(--shadow-primary);
}

.auth-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-subtitle {
  color: var(--clr-text-muted);
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
}

.auth-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

/* --------------------------------------------------------------------------
   6. Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: var(--transition-fast);
}

.card:hover { border-color: var(--clr-border-bright); }

.card-sm { padding: var(--space-4); border-radius: var(--radius-md); }
.card-lg { padding: var(--space-8); border-radius: var(--radius-xl); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.card-title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--clr-text);
}

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

/* Stat Cards */
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: var(--transition-fast);
  cursor: default;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-border-bright);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.stat-icon.purple { background: rgba(108,99,255,0.15); }
.stat-icon.teal { background: rgba(0,212,170,0.15); }
.stat-icon.amber { background: rgba(255,179,71,0.15); }
.stat-icon.coral { background: rgba(255,107,107,0.15); }
.stat-icon.pink { background: rgba(244,114,182,0.15); }

.stat-info { flex: 1; }
.stat-label { font-size: var(--font-size-xs); color: var(--clr-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: var(--font-size-2xl); font-weight: 800; color: var(--clr-text); margin-top: 2px; line-height: 1; }
.stat-trend { font-size: var(--font-size-xs); margin-top: var(--space-2); color: var(--clr-text-muted); }
.stat-trend.up { color: var(--clr-success); }
.stat-trend.down { color: var(--clr-danger); }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--space-5); }

/* --------------------------------------------------------------------------
   7. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
  white-space: nowrap;
  user-select: none;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
  color: white;
  box-shadow: 0 2px 12px var(--clr-primary-glow);
}
.btn-primary:hover { background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-primary)); box-shadow: 0 4px 20px var(--clr-primary-glow); }

.btn-secondary {
  background: linear-gradient(135deg, var(--clr-secondary), var(--clr-secondary-dark));
  color: white;
  box-shadow: 0 2px 12px var(--clr-secondary-glow);
}
.btn-secondary:hover { background: linear-gradient(135deg, var(--clr-secondary-light), var(--clr-secondary)); }

.btn-accent {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-dark));
  color: white;
  box-shadow: 0 2px 12px var(--clr-accent-glow);
}
.btn-accent:hover { background: linear-gradient(135deg, var(--clr-accent-light), var(--clr-accent)); }

.btn-danger {
  background: linear-gradient(135deg, var(--clr-danger), var(--clr-danger-dark));
  color: white;
  box-shadow: 0 2px 12px var(--clr-danger-glow);
}
.btn-danger:hover { opacity: 0.9; }

.btn-ghost {
  background: var(--clr-surface);
  color: var(--clr-text-muted);
  border: var(--glass-border);
}
.btn-ghost:hover { background: var(--clr-surface-hover); color: var(--clr-text); }

.btn-success {
  background: linear-gradient(135deg, var(--clr-success), #22c55e);
  color: #0a2e1a;
  font-weight: 700;
}

.btn-sm { padding: var(--space-2) var(--space-3); font-size: var(--font-size-xs); border-radius: var(--radius-sm); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-md); border-radius: var(--radius-lg); }
.btn-full { width: 100%; justify-content: center; }

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

/* --------------------------------------------------------------------------
   8. Forms & Inputs
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--clr-bg-3);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-text);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px var(--clr-primary-glow);
  background: var(--clr-bg-2);
}

.form-input::placeholder, .form-textarea::placeholder { color: var(--clr-text-faint); }
.form-select { appearance: none; cursor: pointer; }
.form-select option { background: var(--clr-bg-2); }

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

.form-hint { font-size: var(--font-size-xs); color: var(--clr-text-muted); margin-top: var(--space-2); }
.form-error { font-size: var(--font-size-xs); color: var(--clr-danger); margin-top: var(--space-2); }

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

/* Role Selector Cards */
.role-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.role-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  background: var(--clr-surface);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
}

.role-option:hover { background: var(--clr-surface-2); border-color: var(--clr-border-bright); }
.role-option.selected { border-color: var(--clr-primary); background: rgba(108,99,255,0.12); }
.role-option.selected .role-option-icon { background: var(--clr-primary); }

.role-option-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: var(--clr-surface-2);
  transition: var(--transition-fast);
}

.role-option-name {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--clr-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --------------------------------------------------------------------------
   9. Tables
   -------------------------------------------------------------------------- */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: var(--glass-border);
}

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

.data-table thead { background: var(--clr-bg-2); }
.data-table th {
  padding: var(--space-3) var(--space-5);
  text-align: left;
  font-weight: 700;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: var(--font-size-xs);
  border-bottom: var(--glass-border);
  white-space: nowrap;
}

.data-table td {
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--glass-border);
  color: var(--clr-text);
  vertical-align: middle;
}

.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--clr-surface); }
.data-table tbody tr { transition: var(--transition-fast); }

/* --------------------------------------------------------------------------
   10. Status Badges
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge-success { background: rgba(74,222,128,0.12); color: var(--clr-success); }
.badge-warning { background: rgba(252,211,77,0.12); color: var(--clr-warning); }
.badge-danger { background: rgba(255,107,107,0.12); color: var(--clr-danger); }
.badge-info { background: rgba(56,189,248,0.12); color: var(--clr-info); }
.badge-neutral { background: var(--clr-surface-2); color: var(--clr-text-muted); }
.badge-primary { background: rgba(108,99,255,0.12); color: var(--clr-primary-light); }

/* Subject color badges */
.subject-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   11. Progress Bars
   -------------------------------------------------------------------------- */
.progress-bar-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary));
}

.progress-fill.danger { background: linear-gradient(90deg, var(--clr-danger), #ff9a9a); }
.progress-fill.warning { background: linear-gradient(90deg, var(--clr-warning), #fde68a); }
.progress-fill.success { background: linear-gradient(90deg, var(--clr-success), #86efac); }

.progress-value { font-size: var(--font-size-xs); font-weight: 700; color: var(--clr-text-muted); min-width: 36px; text-align: right; }

/* --------------------------------------------------------------------------
   12. Tabs
   -------------------------------------------------------------------------- */
.tab-bar {
  display: flex;
  gap: var(--space-2);
  border-bottom: var(--glass-border);
  margin-bottom: var(--space-6);
  overflow-x: auto;
  padding-bottom: 1px;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--clr-text-muted);
  font-weight: 600;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
  margin-bottom: -1px;
}

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

.tab-count {
  background: var(--clr-surface-2);
  padding: 1px 7px;
  border-radius: var(--radius-full);
  font-size: 11px;
  color: var(--clr-text-muted);
}

/* --------------------------------------------------------------------------
   13. Modal
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: fadeIn 0.2s ease;
}

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

.modal-container {
  background: var(--clr-bg-2);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-lg);
}

.modal-container.modal-lg { max-width: 720px; }
.modal-container.modal-sm { max-width: 400px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.modal-title { font-size: var(--font-size-xl); font-weight: 800; color: var(--clr-text); }
.modal-close {
  width: 32px;
  height: 32px;
  background: var(--clr-surface);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  color: var(--clr-text-muted);
  transition: var(--transition-fast);
}
.modal-close:hover { background: var(--clr-danger); color: white; }

.modal-footer {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: var(--glass-border);
}

/* --------------------------------------------------------------------------
   14. Toast Notifications
   -------------------------------------------------------------------------- */
#toast-container {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--clr-bg-2);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  max-width: 400px;
  pointer-events: all;
  animation: toastIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.toast.toast-success { border-left: 4px solid var(--clr-success); }
.toast.toast-error { border-left: 4px solid var(--clr-danger); }
.toast.toast-warning { border-left: 4px solid var(--clr-warning); }
.toast.toast-info { border-left: 4px solid var(--clr-primary); }

.toast-icon { font-size: 20px; flex-shrink: 0; }
.toast-message { flex: 1; color: var(--clr-text); }
.toast-out { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn { from { transform: translateX(100px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toastOut { to { transform: translateX(100px); opacity: 0; } }

/* --------------------------------------------------------------------------
   15. Notification Panel
   -------------------------------------------------------------------------- */
.notification-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 380px;
  background: var(--clr-bg-2);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
  animation: fadeIn 0.2s ease;
}

.notification-panel-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.notification-list { max-height: 360px; overflow-y: auto; }

.notification-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--glass-border);
  transition: var(--transition-fast);
  cursor: pointer;
}
.notification-item:hover { background: var(--clr-surface); }
.notification-item.unread { background: rgba(108,99,255,0.06); }
.notification-item:last-child { border-bottom: none; }

.notif-dot { width: 8px; height: 8px; background: var(--clr-primary); border-radius: 50%; margin-top: 6px; flex-shrink: 0; }
.notif-text { font-size: var(--font-size-xs); color: var(--clr-text); line-height: 1.5; }
.notif-time { font-size: 11px; color: var(--clr-text-faint); margin-top: 2px; }

/* --------------------------------------------------------------------------
   16. Charts (SVG & CSS)
   -------------------------------------------------------------------------- */
.chart-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.bar-chart { display: flex; flex-direction: column; gap: var(--space-4); }
.bar-chart-row { display: flex; align-items: center; gap: var(--space-3); }
.bar-label {
  width: 120px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--clr-text-muted);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
}
.bar-track {
  flex: 1;
  height: 10px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}
.bar-pct { font-size: var(--font-size-xs); font-weight: 700; min-width: 40px; color: var(--clr-text); }

/* Radar Chart SVG */
.radar-chart svg { overflow: visible; }

/* --------------------------------------------------------------------------
   17. Homework / Check Items
   -------------------------------------------------------------------------- */
.homework-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: var(--transition-fast);
  margin-bottom: var(--space-3);
}

.homework-card:hover { border-color: var(--clr-border-bright); }
.homework-card.completed { opacity: 0.65; }

.hw-check {
  width: 28px;
  height: 28px;
  border: 2px solid var(--clr-border-bright);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: var(--transition-fast);
  margin-top: 2px;
  font-size: 16px;
}

.hw-check:hover { border-color: var(--clr-success); background: rgba(74,222,128,0.1); }
.hw-check.checked { background: var(--clr-success); border-color: var(--clr-success); color: #0a2e1a; font-weight: 700; }

.hw-info { flex: 1; }
.hw-title { font-weight: 700; color: var(--clr-text); font-size: var(--font-size-sm); }
.hw-desc { color: var(--clr-text-muted); font-size: var(--font-size-xs); margin-top: 2px; line-height: 1.5; }
.hw-meta { display: flex; align-items: center; gap: var(--space-3); margin-top: var(--space-2); }
.hw-due { font-size: var(--font-size-xs); color: var(--clr-text-faint); }
.hw-due.overdue { color: var(--clr-danger); }

/* --------------------------------------------------------------------------
   18. Test Interface
   -------------------------------------------------------------------------- */
.test-question-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.question-number {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--clr-primary-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-2);
}

.question-text { font-size: var(--font-size-md); font-weight: 600; color: var(--clr-text); margin-bottom: var(--space-4); line-height: 1.5; }

.mcq-options { display: flex; flex-direction: column; gap: var(--space-3); }
.mcq-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--clr-surface);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.mcq-option:hover { background: var(--clr-surface-2); border-color: var(--clr-primary); }
.mcq-option.selected { background: rgba(108,99,255,0.15); border-color: var(--clr-primary); color: var(--clr-primary-light); }
.mcq-option.correct { background: rgba(74,222,128,0.15); border-color: var(--clr-success); }
.mcq-option.wrong { background: rgba(255,107,107,0.15); border-color: var(--clr-danger); }

.option-circle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--clr-border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.mcq-option.selected .option-circle { background: var(--clr-primary); border-color: var(--clr-primary); color: white; }

/* Score Display */
.score-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: conic-gradient(var(--clr-primary) var(--pct, 0%), var(--clr-surface-2) 0%);
  position: relative;
}

.score-circle::before {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--clr-bg-2);
}

.score-number {
  position: relative;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--clr-text);
}

/* --------------------------------------------------------------------------
   19. Video Suggestion Cards
   -------------------------------------------------------------------------- */
.video-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-fast);
  cursor: pointer;
}

.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--clr-border-bright); }

.video-thumbnail {
  height: 140px;
  background: linear-gradient(135deg, rgba(108,99,255,0.3), rgba(0,212,170,0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  position: relative;
}

.play-btn-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-fast);
}

.video-card:hover .play-btn-overlay { opacity: 1; }
.play-btn-overlay::after { content: '▶'; font-size: 32px; color: white; }

.video-info { padding: var(--space-4); }
.video-title { font-weight: 700; font-size: var(--font-size-sm); color: var(--clr-text); line-height: 1.4; }
.video-meta { font-size: var(--font-size-xs); color: var(--clr-text-muted); margin-top: var(--space-2); }

/* --------------------------------------------------------------------------
   20. Empty States
   -------------------------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  color: var(--clr-text-muted);
}

.empty-icon { font-size: 64px; margin-bottom: var(--space-4); opacity: 0.5; }
.empty-title { font-size: var(--font-size-lg); font-weight: 700; color: var(--clr-text); margin-bottom: var(--space-2); }
.empty-desc { font-size: var(--font-size-sm); max-width: 320px; margin: 0 auto; }

/* --------------------------------------------------------------------------
   21. User / Student Cards
   -------------------------------------------------------------------------- */
.user-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  transition: var(--transition-fast);
}

.user-card:hover { border-color: var(--clr-border-bright); }

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.user-info { flex: 1; min-width: 0; }
.user-name { font-weight: 700; color: var(--clr-text); font-size: var(--font-size-sm); }
.user-email { font-size: var(--font-size-xs); color: var(--clr-text-muted); margin-top: 2px; }
.user-actions { display: flex; gap: var(--space-2); }

/* --------------------------------------------------------------------------
   22. Pending Request Cards
   -------------------------------------------------------------------------- */
.request-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: var(--transition-fast);
  border-left: 3px solid var(--clr-warning);
}

.request-card:hover { border-color: var(--clr-warning); background: var(--clr-surface); }

/* --------------------------------------------------------------------------
   23. Colours for Subjects (dynamic, inline style used)
   -------------------------------------------------------------------------- */
.subject-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   24. Section Dividers & Layout Helpers
   -------------------------------------------------------------------------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.section-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--clr-text);
}

.divider { border: none; border-top: var(--glass-border); margin: var(--space-6) 0; }

.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.flex-1 { flex: 1; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* Search Bar */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--clr-bg-3);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  min-width: 240px;
}

.search-bar input {
  background: none;
  border: none;
  color: var(--clr-text);
  font-size: var(--font-size-sm);
  width: 100%;
}

.search-bar input::placeholder { color: var(--clr-text-faint); }

/* --------------------------------------------------------------------------
   25. Animations & Keyframes
   -------------------------------------------------------------------------- */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes slideDown { from { transform: translateY(-10px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
@keyframes confetti {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.animate-fadeIn { animation: fadeIn 0.3s ease; }
.animate-slideUp { animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1); }

/* Skeleton loader */
.skeleton {
  background: linear-gradient(90deg, var(--clr-surface) 25%, var(--clr-surface-2) 50%, var(--clr-surface) 75%);
  background-size: 400px 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   26. Welcome / Hero Banners
   -------------------------------------------------------------------------- */
.welcome-banner {
  background: linear-gradient(135deg, rgba(108,99,255,0.2), rgba(0,212,170,0.15));
  border: 1px solid rgba(108,99,255,0.25);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
}

.welcome-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(108,99,255,0.15), transparent 70%);
  pointer-events: none;
}

.welcome-greeting {
  font-size: var(--font-size-sm);
  color: var(--clr-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.welcome-name {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--clr-text);
  margin-top: var(--space-1);
}

.welcome-date {
  font-size: var(--font-size-sm);
  color: var(--clr-text-muted);
  margin-top: var(--space-2);
}

/* --------------------------------------------------------------------------
   27. Scrollbar
   -------------------------------------------------------------------------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--clr-border-bright); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-text-muted); }

/* --------------------------------------------------------------------------
   28. Demo credentials box
   -------------------------------------------------------------------------- */
.demo-creds {
  background: var(--clr-bg-3);
  border: var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-5);
  font-size: var(--font-size-xs);
}

.demo-creds-title {
  font-weight: 700;
  color: var(--clr-accent);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.demo-cred-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: var(--glass-border);
  color: var(--clr-text-muted);
}

.demo-cred-row:last-child { border-bottom: none; }
.demo-cred-email { font-weight: 600; color: var(--clr-text); }
.demo-cred-pass { color: var(--clr-secondary); font-weight: 600; font-family: monospace; }

/* --------------------------------------------------------------------------
   29. Exam Upload Area
   -------------------------------------------------------------------------- */
.upload-area {
  border: 2px dashed var(--clr-border-bright);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.upload-area:hover {
  border-color: var(--clr-primary);
  background: rgba(108,99,255,0.05);
}

.upload-icon { font-size: 40px; margin-bottom: var(--space-3); }
.upload-title { font-weight: 700; color: var(--clr-text); margin-bottom: var(--space-2); }
.upload-hint { font-size: var(--font-size-xs); color: var(--clr-text-muted); }

/* --------------------------------------------------------------------------
   30. Tab Bar
   -------------------------------------------------------------------------- */
.tab-bar {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  background: var(--clr-bg-3);
  border: var(--glass-border);
  padding: 6px;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  flex-wrap: wrap;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--clr-text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.tab-btn:hover { background: var(--clr-surface); color: var(--clr-text); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
  color: white;
  box-shadow: 0 2px 8px var(--clr-primary-glow);
}

.tab-count {
  background: rgba(255,255,255,0.15);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   31. Notification Panel
   -------------------------------------------------------------------------- */
.notification-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 360px;
  max-height: 480px;
  background: var(--clr-bg-2);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.notification-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--glass-border);
  font-weight: 700;
  font-size: 14px;
}

.notification-list { overflow-y: auto; flex: 1; }

.notification-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: var(--glass-border);
  transition: var(--transition-fast);
}
.notification-item:hover { background: var(--clr-surface); }
.notification-item.unread { background: rgba(108,99,255,0.04); }

.notif-dot {
  width: 8px;
  height: 8px;
  background: var(--clr-primary);
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
  box-shadow: 0 0 6px var(--clr-primary-glow);
}

.notif-text { font-size: 13px; line-height: 1.5; }
.notif-time { font-size: 11px; color: var(--clr-text-faint); margin-top: 3px; }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-slideDown { animation: slideDown 0.2s ease; }

/* --------------------------------------------------------------------------
   32. Bar Charts
   -------------------------------------------------------------------------- */
.bar-chart { display: flex; flex-direction: column; gap: 10px; }

.bar-chart-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bar-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--clr-text-muted);
  width: 120px;
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bar-track {
  flex: 1;
  height: 8px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--clr-primary);
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}
.bar-fill.success { background: var(--clr-success); }
.bar-fill.warning { background: var(--clr-warning); }
.bar-fill.danger { background: var(--clr-danger); }

.bar-pct {
  font-size: 12px;
  font-weight: 800;
  width: 44px;
  text-align: right;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   33. Progress Bars
   -------------------------------------------------------------------------- */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--clr-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--clr-primary);
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.progress-fill.success { background: var(--clr-success); }
.progress-fill.warning { background: var(--clr-warning); }
.progress-fill.danger { background: var(--clr-danger); }

.progress-bar-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}
.progress-value {
  font-size: 13px;
  font-weight: 800;
  width: 44px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   34. Test / Quiz UI
   -------------------------------------------------------------------------- */
.test-question-card {
  background: var(--clr-surface);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
}

.question-number {
  font-size: 11px;
  font-weight: 700;
  color: var(--clr-primary-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-3);
}

.question-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.mcq-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mcq-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--clr-bg-3);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  font-weight: 500;
}

.mcq-option:hover {
  background: rgba(108,99,255,0.1);
  border-color: var(--clr-primary);
}

.mcq-option.selected {
  background: rgba(108,99,255,0.2);
  border-color: var(--clr-primary);
  color: var(--clr-primary-light);
}

.option-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--clr-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}

.mcq-option.selected .option-circle {
  background: var(--clr-primary);
  color: white;
}

/* --------------------------------------------------------------------------
   35. Welcome Banner
   -------------------------------------------------------------------------- */
.welcome-banner {
  background: linear-gradient(135deg,
    rgba(108,99,255,0.15) 0%,
    rgba(0,212,170,0.1) 50%,
    rgba(255,179,71,0.08) 100%);
  border: 1px solid rgba(108,99,255,0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
}
.welcome-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(108,99,255,0.15), transparent 70%);
  pointer-events: none;
}

.welcome-greeting { font-size: 14px; color: var(--clr-text-muted); font-weight: 500; }
.welcome-name { font-size: 1.75rem; font-weight: 800; color: var(--clr-text); margin-top: 4px; }
.welcome-date { font-size: 13px; color: var(--clr-text-muted); margin-top: 6px; }

/* --------------------------------------------------------------------------
   36. Section Headers
   -------------------------------------------------------------------------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  margin-top: var(--space-6);
}

.section-title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--clr-text);
}

/* --------------------------------------------------------------------------
   37. Subject Chip
   -------------------------------------------------------------------------- */
.subject-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   38. Video Cards
   -------------------------------------------------------------------------- */
.video-card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-fast);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--clr-border-bright); }

.video-thumbnail {
  height: 140px;
  background: linear-gradient(135deg, rgba(108,99,255,0.25), rgba(0,212,170,0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.play-btn-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-fast);
}
.play-btn-overlay::after {
  content: '▶';
  font-size: 36px;
  color: white;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}
.video-card:hover .play-btn-overlay { opacity: 1; }

.video-info { padding: var(--space-4); }
.video-title { font-weight: 700; font-size: 13px; line-height: 1.4; margin-bottom: 6px; color: var(--clr-text); }
.video-meta { font-size: 11px; color: var(--clr-text-muted); }

/* --------------------------------------------------------------------------
   39. Chart Container
   -------------------------------------------------------------------------- */
.chart-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}

/* --------------------------------------------------------------------------
   40. Divider
   -------------------------------------------------------------------------- */
.divider { border: none; border-top: var(--glass-border); margin: var(--space-5) 0; }

/* --------------------------------------------------------------------------
   41. Badge neutral
   -------------------------------------------------------------------------- */
.badge-neutral { background: var(--clr-surface-2); color: var(--clr-text-muted); }
.badge-primary { background: rgba(108,99,255,0.2); color: var(--clr-primary-light); }

/* --------------------------------------------------------------------------
   42. Request Card
   -------------------------------------------------------------------------- */
.request-card {
  padding: var(--space-4);
  background: var(--clr-surface);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
}

/* --------------------------------------------------------------------------
   43. Grid-3 column helper
   -------------------------------------------------------------------------- */
.grid-3-col { grid-column: 1 / -1; }

/* --------------------------------------------------------------------------
   44. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .sidebar { transform: translateX(-100%); }
  .main-content { margin-left: 0; }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .role-selector { grid-template-columns: 1fr; }
  .page-content { padding: var(--space-4); }
  .bar-label { width: 80px; }
  .notification-panel { width: 300px; }
}

/* --------------------------------------------------------------------------
   Google OAuth Styles
   -------------------------------------------------------------------------- */
.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 13px 20px;
  background: #fff;
  color: #3c4043;
  border: 1.5px solid #dadce0;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: box-shadow 0.2s, background 0.2s;
  margin-bottom: 4px;
}
.google-btn:hover {
  background: #f8f9fa;
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
  text-decoration: none;
  color: #3c4043;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--clr-text-faint);
  font-size: 12px;
  font-weight: 500;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--clr-border);
}

.role-option input[type="radio"] { display: none; }
.role-option:hover {
  background: rgba(108,99,255,0.08) !important;
  border-color: var(--clr-primary-light) !important;
}