/* ===== HI Exam Prep — Complete Stylesheet ===== */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&family=Lato:wght@300;400;700&display=swap');

:root {
  --primary: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-dark: #d97706;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: rgba(255,255,255,0.85);
  --text: #1e293b;
  --text-light: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --info: #0ea5e9;
  --info-bg: #f0f9ff;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 40px -10px rgba(0,0,0,0.15);
  --transition: all 0.2s ease;
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Lato', sans-serif;
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.3);
  --glass-shadow: 0 8px 32px rgba(30,64,175,0.08);
}

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

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-alt);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.3; color: var(--text); }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; }

/* ===== Navbar ===== */
.navbar {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--glass-shadow);
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
}
.navbar-brand i { color: var(--accent); font-size: 1.5rem; }
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.navbar-nav a {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}
.navbar-nav a:hover, .navbar-nav a.active { color: var(--primary); background: var(--primary-50); }
.navbar-actions { display: flex; align-items: center; gap: 0.75rem; }

.lang-toggle {
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  transition: var(--transition);
}
.lang-toggle:hover { border-color: var(--primary-light); }

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text);
  cursor: pointer;
}

/* ===== Layout ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.container-sm { max-width: 480px; margin: 0 auto; padding: 0 1.5rem; }
.container-md { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }
.page { padding: 2rem 0; }
.page-header { margin-bottom: 2rem; }
.page-header h1 { margin-bottom: 0.25rem; }
.page-header p { color: var(--text-light); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none !important; }

/* ===== Cards (Glassmorphism) ===== */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--glass-shadow);
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card-static { composes: card; }
.card-static:hover { transform: none; }
.card-header { margin-bottom: 1rem; }
.card-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  background: var(--primary-50);
  color: var(--primary);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.25rem; }
.card-text { color: var(--text-light); font-size: 0.9rem; }

/* ===== Stat Cards ===== */
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--glass-shadow);
}
.stat-card .stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}
.stat-card .stat-label { color: var(--text-light); font-size: 0.85rem; }

/* ===== Mode Cards ===== */
.mode-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--glass-shadow);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.mode-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--primary-light);
}
.mode-card .mode-icon {
  width: 56px; height: 56px;
  margin: 0 auto 0.75rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 1.4rem;
}
.mode-card .mode-title { font-family: var(--font-heading); font-weight: 600; margin-bottom: 0.25rem; }
.mode-card .mode-desc { color: var(--text-light); font-size: 0.85rem; }

/* ===== Grid Layouts ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.grid-modes { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.grid-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1rem; }
.grid-chapters { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.4;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-ghost { background: transparent; color: var(--text-light); }
.btn-ghost:hover { background: var(--bg-alt); color: var(--text); }
.btn-lg { padding: 0.875rem 2rem; font-size: 1rem; border-radius: var(--radius); }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8rem; }
.btn-block { width: 100%; }
.btn-icon { padding: 0.5rem; width: 36px; height: 36px; }

/* ===== Forms ===== */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.375rem;
  color: var(--text);
}
.form-control {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  transition: var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px var(--primary-200);
}
.form-control::placeholder { color: var(--text-muted); }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }
.input-group { position: relative; }
.input-group .form-control { padding-right: 2.5rem; }
.input-group .toggle-password {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
}
.form-error { color: var(--danger); font-size: 0.8rem; margin-top: 0.25rem; }

/* ===== Auth Pages ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  padding: 2rem 1rem;
}
.auth-card {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-xl);
}
.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}
.auth-logo i { font-size: 2.5rem; color: var(--primary); }
.auth-logo h1 { font-size: 1.5rem; color: var(--primary); margin-top: 0.5rem; }
.auth-logo p { color: var(--text-light); font-size: 0.9rem; }
.auth-footer { text-align: center; margin-top: 1.5rem; font-size: 0.9rem; color: var(--text-light); }
.auth-footer a { font-weight: 600; }

/* ===== Exam UI ===== */
.exam-container { max-width: 800px; margin: 0 auto; }
.exam-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
  box-shadow: var(--glass-shadow);
}
.exam-timer {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.exam-timer.warning { color: var(--accent); }
.exam-timer.danger { color: var(--danger); animation: pulse 1s infinite; }
.exam-progress-text { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }

.exam-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  margin-bottom: 1.5rem;
  overflow: hidden;
}
.exam-progress-bar .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 3px;
  transition: width 0.3s ease;
}

.question-card {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
}
.question-number {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.question-text {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.option-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg);
}
.option-item:hover {
  border-color: var(--primary-light);
  background: var(--primary-50);
}
.option-item.selected {
  border-color: var(--primary);
  background: var(--primary-50);
  box-shadow: 0 0 0 3px var(--primary-200);
}
.option-item.correct {
  border-color: var(--success);
  background: var(--success-bg);
}
.option-item.incorrect {
  border-color: var(--danger);
  background: var(--danger-bg);
}
.option-item input[type="radio"] { display: none; }
.option-letter {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--bg-alt);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-light);
  flex-shrink: 0;
  transition: var(--transition);
}
.option-item.selected .option-letter { background: var(--primary); color: #fff; }
.option-item.correct .option-letter { background: var(--success); color: #fff; }
.option-item.incorrect .option-letter { background: var(--danger); color: #fff; }
.option-text { flex: 1; font-size: 0.95rem; }

.exam-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

/* ===== Chapter Selector Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}
.modal-overlay.active .modal { transform: translateY(0); }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.modal-header h2 { margin: 0; }
.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
}
.modal-close:hover { color: var(--text); }
.chapter-list { display: flex; flex-direction: column; gap: 0.5rem; }
.chapter-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}
.chapter-item:hover { border-color: var(--primary-light); background: var(--primary-50); }
.chapter-item.selected { border-color: var(--primary); background: var(--primary-100); }
.chapter-item .ch-number {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--primary-50);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.8rem;
  margin-right: 0.75rem;
  flex-shrink: 0;
}
.chapter-item .ch-info { flex: 1; }
.chapter-item .ch-name { font-weight: 600; font-size: 0.9rem; }
.chapter-item .ch-domain { font-size: 0.8rem; color: var(--text-light); }
.chapter-item .ch-count { font-size: 0.8rem; color: var(--text-muted); }

/* ===== Results ===== */
.score-circle {
  width: 200px; height: 200px;
  margin: 0 auto 1.5rem;
  position: relative;
}
.score-circle svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.score-circle .track { fill: none; stroke: var(--border); stroke-width: 8; }
.score-circle .fill-ring {
  fill: none;
  stroke: var(--primary);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 565;
  stroke-dashoffset: 565;
  transition: stroke-dashoffset 1.5s ease;
}
.score-circle .fill-ring.pass { stroke: var(--success); }
.score-circle .fill-ring.fail { stroke: var(--danger); }
.score-value {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
.score-value .percent {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text);
}
.score-value .label { font-size: 0.85rem; color: var(--text-light); }

.domain-bar {
  margin-bottom: 1rem;
}
.domain-bar .domain-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}
.domain-bar .domain-name { font-weight: 600; }
.domain-bar .domain-pct { color: var(--text-light); }

.review-item {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  border-left: 4px solid var(--border);
}
.review-item.correct-review { border-left-color: var(--success); }
.review-item.incorrect-review { border-left-color: var(--danger); }
.review-item .review-q { font-weight: 600; margin-bottom: 0.5rem; }
.review-item .review-answer { font-size: 0.9rem; color: var(--text-light); }
.review-item .review-answer.correct-text { color: var(--success); }
.review-item .review-answer.incorrect-text { color: var(--danger); }

/* ===== Progress Bars ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar .progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transition: width 0.5s ease;
}
.progress-bar .progress-fill.success { background: linear-gradient(90deg, var(--success), #22c55e); }
.progress-bar .progress-fill.danger { background: linear-gradient(90deg, var(--danger), #ef4444); }
.progress-bar .progress-fill.accent { background: linear-gradient(90deg, var(--accent), var(--accent-light)); }

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-primary { background: var(--primary-100); color: var(--primary); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--accent-dark); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-lg { padding: 0.5rem 1.25rem; font-size: 1rem; }

/* ===== Tables ===== */
.table-wrapper { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
thead { background: var(--bg-alt); }
th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  border-bottom: 2px solid var(--border);
}
td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-light);
}
tbody tr { transition: var(--transition); }
tbody tr:hover { background: var(--primary-50); }
tbody tr.clickable { cursor: pointer; }

/* ===== Toast / Alerts ===== */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--primary);
  min-width: 280px;
  max-width: 420px;
  animation: slideIn 0.3s ease;
  font-size: 0.9rem;
}
.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--accent); }
.toast.toast-info { border-left-color: var(--info); }
.toast i { font-size: 1.1rem; }
.toast.toast-success i { color: var(--success); }
.toast.toast-error i { color: var(--danger); }
.toast.toast-warning i { color: var(--accent); }
.toast.toast-info i { color: var(--info); }
.toast .toast-msg { flex: 1; }
.toast .toast-close {
  background: none; border: none;
  color: var(--text-muted); cursor: pointer;
  font-size: 1rem;
}

.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
}
.alert-info { background: var(--info-bg); color: #0369a1; border: 1px solid #bae6fd; }
.alert-success { background: var(--success-bg); color: #166534; border: 1px solid #bbf7d0; }
.alert-warning { background: var(--warning-bg); color: #92400e; border: 1px solid #fde68a; }
.alert-danger { background: var(--danger-bg); color: #991b1b; border: 1px solid #fecaca; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: #fff;
  padding: 5rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.1) 0%, transparent 60%);
}
.hero h1 { font-size: 2.75rem; font-weight: 800; color: #fff; margin-bottom: 1rem; position: relative; }
.hero p { font-size: 1.2rem; opacity: 0.9; max-width: 600px; margin: 0 auto 2rem; position: relative; }
.hero .btn { position: relative; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  padding: 3rem 0;
}
.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--glass-shadow);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card .feature-icon {
  width: 64px; height: 64px;
  margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 1.5rem;
}
.feature-card h3 { margin-bottom: 0.5rem; }
.feature-card p { color: var(--text-light); font-size: 0.9rem; }

/* ===== Pending Page ===== */
.pending-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}
.pending-icon { font-size: 4rem; color: var(--accent); margin-bottom: 1rem; }

/* ===== Certificate ===== */
.certificate-frame {
  border: 3px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 2rem;
  background: var(--bg);
  text-align: center;
}

/* ===== Upload ===== */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}
.upload-area:hover { border-color: var(--primary-light); background: var(--primary-50); }
.upload-area i { font-size: 2.5rem; color: var(--text-muted); margin-bottom: 0.75rem; }
.upload-preview { max-width: 300px; margin: 1rem auto; border-radius: var(--radius); }

/* ===== Admin ===== */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 240px;
  background: var(--primary-dark);
  color: #fff;
  padding: 1.5rem 0;
  flex-shrink: 0;
}
.admin-sidebar .sidebar-brand {
  padding: 0 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 1rem;
}
.admin-sidebar .sidebar-brand i { color: var(--accent); margin-right: 0.5rem; }
.admin-sidebar nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  transition: var(--transition);
}
.admin-sidebar nav a:hover { color: #fff; background: rgba(255,255,255,0.1); }
.admin-sidebar nav a.active { color: #fff; background: rgba(255,255,255,0.15); border-right: 3px solid var(--accent); }
.admin-content { flex: 1; padding: 2rem; background: var(--bg-alt); overflow-y: auto; }

/* ===== Search / Filter Bars ===== */
.search-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.search-bar .form-control { max-width: 320px; }

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  margin-top: 1.5rem;
}
.pagination button, .pagination a {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}
.pagination button:hover, .pagination a:hover { border-color: var(--primary-light); background: var(--primary-50); }
.pagination button.active, .pagination a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ===== Test Status ===== */
.test-status-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--glass-shadow);
}
.test-status-card .test-name { font-weight: 700; font-family: var(--font-heading); }
.test-status-card .test-badge { margin-left: 0.75rem; }

/* ===== Animations ===== */
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.4s ease; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .navbar { padding: 0 1rem; }
  .navbar-nav { display: none; }
  .navbar-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem;
    box-shadow: var(--shadow-md);
  }
  .hamburger { display: block; }
  h1 { font-size: 1.5rem; }
  .hero { padding: 3rem 1rem; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-modes { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .auth-card { padding: 1.5rem; }
  .exam-header { flex-wrap: wrap; gap: 0.5rem; }
  .admin-sidebar { display: none; }
  .admin-content { padding: 1rem; }
  .search-bar .form-control { max-width: 100%; }
}
@media (max-width: 480px) {
  .grid-modes { grid-template-columns: 1fr; }
  .exam-nav { flex-direction: column; }
}