/* ============================================================
   OLYMPIAD EXAM PLATFORM — CUSTOM CSS
   Primary: #2563EB | Secondary: #0F172A | Success: #22C55E
   ============================================================ */

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

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #DBEAFE;
  --secondary: #0F172A;
  --secondary-light: #1E293B;
  --success: #22C55E;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #06B6D4;
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --text: #1E293B;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Poppins', 'Hind Siliguri', sans-serif;
}

/* ── Base ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Typography ────────────────────────────────────────────── */
h1,h2,h3,h4,h5,h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  line-height: 1.3;
  color: var(--secondary);
}

.bn-text {
  font-family: 'Hind Siliguri', sans-serif;
}

/* ── Navbar ────────────────────────────────────────────────── */
.navbar-olympiad {
  background: rgba(15, 23, 42, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 0.6rem 0;
  position: sticky;
  top: 0;
  z-index: 1030;
  transition: var(--transition);
}

.navbar-olympiad .navbar-brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff !important;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.navbar-olympiad .navbar-brand span {
  color: var(--primary);
}

.navbar-olympiad .nav-link {
  color: rgba(255,255,255,0.8) !important;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 0.9rem !important;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.navbar-olympiad .nav-link:hover,
.navbar-olympiad .nav-link.active {
  color: #fff !important;
  background: rgba(255,255,255,0.1);
}

.navbar-olympiad .navbar-toggler {
  border-color: rgba(255,255,255,0.35);
  padding: 5px 8px;
  border-radius: 8px;
  flex-shrink: 0;
}

.navbar-olympiad .navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(37,99,235,0.35);
  outline: none;
}

.navbar-olympiad .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  width: 22px;
  height: 22px;
}

/* মোবাইলে শুধু হ্যামবার্গার দেখাবে, বাটনগুলো collapse menu-তে থাকবে */
.navbar-mobile-btns {
  display: none;
}

/* Desktop: right-side action buttons */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

/* Collapsed mobile menu-এ নেভ লিংক ও বাটনের স্টাইল */
@media (max-width: 991.98px) {
  .navbar-collapse .navbar-nav {
    padding: 0.5rem 0;
  }

  .navbar-collapse .nav-link {
    padding: 0.6rem 1rem !important;
    border-radius: var(--radius-sm);
  }

  .navbar-collapse .navbar-mobile-btns {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem 1rem 1rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: 0.5rem;
  }

  .navbar-collapse .navbar-mobile-btns .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

/* ── Hero Section ──────────────────────────────────────────── */
.hero-section {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 50%, #2563EB 100%);
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg), transparent);
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: blobFloat 8s ease-in-out infinite;
}

.hero-blob-1 {
  width: 500px; height: 500px;
  background: var(--primary);
  top: -100px; right: -100px;
}

.hero-blob-2 {
  width: 400px; height: 400px;
  background: #7C3AED;
  bottom: 0; left: -100px;
  animation-delay: -4s;
}

@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: #fff;
  margin-bottom: 1.5rem;
  animation: fadeInDown 0.6s ease;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  animation: fadeInUp 0.7s ease;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #FCD34D, #F59E0B);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: rgba(255,255,255,0.75);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease;
}

/* ── Countdown ─────────────────────────────────────────────── */
.countdown-wrapper {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.countdown-item {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  text-align: center;
  min-width: 80px;
}

.countdown-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  font-family: 'Poppins', monospace;
}

.countdown-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* ── Glassmorphism Cards ───────────────────────────────────── */
.glass-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-olympiad {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
}

.card-olympiad:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ── Stat Cards ────────────────────────────────────────────── */
.stat-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn-olympiad {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(37,99,235,0.35);
}

.btn-olympiad:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37,99,235,0.45);
  color: #fff;
}

.btn-olympiad:active { transform: translateY(0); }

.btn-olympiad-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 0.65rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  cursor: pointer;
}

.btn-olympiad-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-olympiad-white {
  background: #fff;
  color: var(--primary);
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-olympiad-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  color: var(--primary-dark);
}

/* ── Forms ─────────────────────────────────────────────────── */
.form-olympiad .form-control,
.form-olympiad .form-select {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  transition: var(--transition);
  background: #fff;
}

.form-olympiad .form-control:focus,
.form-olympiad .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.12);
  outline: none;
}

.form-olympiad .form-label {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--secondary);
  margin-bottom: 0.4rem;
}

.form-olympiad .input-group-text {
  border: 2px solid var(--border);
  background: #F8FAFC;
  color: var(--text-muted);
}

.form-olympiad .input-group .form-control {
  border-left: none;
}

.form-olympiad .input-group:focus-within .input-group-text {
  border-color: var(--primary);
}

/* ── Dashboard Sidebar ─────────────────────────────────────── */
.sidebar {
  background: var(--secondary);
  height: 100vh;
  width: 260px;
  position: fixed;
  left: 0; top: 0;
  z-index: 100;
  transition: var(--transition);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.sidebar-brand {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand .brand-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), #7C3AED);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.sidebar-brand .brand-text {
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
  line-height: 1.3;
}

.sidebar-brand .brand-text small {
  display: block;
  color: rgba(255,255,255,0.5);
  font-size: 0.72rem;
  font-weight: 400;
}

.sidebar-nav {
  padding: 1rem 0.75rem;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 2px;
}

.sidebar-nav-item:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.sidebar-nav-item.active {
  background: linear-gradient(135deg, var(--primary), #1D4ED8);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.sidebar-nav-item .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.sidebar-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: rgba(255,255,255,0.3);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 1rem 1rem 0.4rem;
}

.main-content {
  margin-left: 260px;
  min-height: 100vh;
  transition: var(--transition);
}

@media (max-width: 991.98px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.show { transform: translateX(0); }
  .main-content { margin-left: 0; }
}

/* ── Top Bar ───────────────────────────────────────────────── */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 99;
  box-shadow: var(--shadow-sm);
}

/* ── Badge Colors ──────────────────────────────────────────── */
.badge-olympiad {
  padding: 5px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-paid    { background: #D1FAE5; color: #065F46; }
.badge-pending { background: #FEF3C7; color: #92400E; }
.badge-unpaid  { background: #FEE2E2; color: #991B1B; }
.badge-rejected{ background: #F1F5F9; color: #475569; }
.badge-active  { background: #D1FAE5; color: #065F46; }
.badge-blocked { background: #FEE2E2; color: #991B1B; }

/* ── Exam Panel ────────────────────────────────────────────── */
.exam-panel {
  background: var(--secondary);
  min-height: 100vh;
  position: relative;
}

.exam-topbar {
  background: rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}

.exam-timer {
  background: linear-gradient(135deg, #EF4444, #DC2626);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius);
  font-family: monospace;
  letter-spacing: 2px;
  box-shadow: 0 4px 12px rgba(239,68,68,0.4);
  animation: timerPulse 1s ease infinite;
}

.exam-timer.warning {
  background: linear-gradient(135deg, var(--warning), #D97706);
  box-shadow: 0 4px 12px rgba(245,158,11,0.4);
}

.exam-timer.danger {
  background: linear-gradient(135deg, #EF4444, #991B1B);
  animation: timerUrgent 0.5s ease infinite;
}

@keyframes timerPulse {
  0%, 100% { box-shadow: 0 4px 12px rgba(239,68,68,0.4); }
  50% { box-shadow: 0 4px 20px rgba(239,68,68,0.6); }
}

@keyframes timerUrgent {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

.question-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.question-number {
  background: var(--primary);
  color: #fff;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.question-text {
  font-size: 1.1rem;
  color: #fff;
  font-weight: 500;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 0.9rem 1.2rem;
  border: 2px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 0.75rem;
  text-align: left;
}

.option-btn:hover {
  border-color: var(--primary);
  background: rgba(37,99,235,0.12);
  color: #fff;
}

.option-btn.selected {
  border-color: var(--primary);
  background: rgba(37,99,235,0.25);
  color: #fff;
}

.option-btn.correct {
  border-color: var(--success);
  background: rgba(34,197,94,0.2);
  color: #fff;
}

.option-btn.wrong {
  border-color: var(--danger);
  background: rgba(239,68,68,0.15);
  color: #fff;
}

.option-label {
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.option-btn.selected .option-label {
  background: var(--primary);
}

.question-nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}

.q-nav-btn {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 2px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.6);
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.q-nav-btn.answered {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.q-nav-btn.current {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.q-nav-btn:hover {
  border-color: var(--primary);
  color: #fff;
}

/* ── Leaderboard ───────────────────────────────────────────── */
.leaderboard-table th {
  background: var(--secondary);
  color: rgba(255,255,255,0.7);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 0.85rem 1rem;
  border: none;
}

.leaderboard-table td {
  padding: 0.85rem 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--border);
}

.leaderboard-table .rank-gold   { color: #F59E0B; font-weight: 800; font-size: 1.3rem; }
.leaderboard-table .rank-silver { color: #94A3B8; font-weight: 800; font-size: 1.3rem; }
.leaderboard-table .rank-bronze { color: #CD7C32; font-weight: 800; font-size: 1.3rem; }

.leaderboard-table tbody tr:hover { background: var(--bg); }
.leaderboard-table tbody tr:first-child { background: rgba(245,158,11,0.05); }
.leaderboard-table tbody tr:nth-child(2) { background: rgba(148,163,184,0.05); }
.leaderboard-table tbody tr:nth-child(3) { background: rgba(205,124,50,0.05); }

/* ── Result Page ───────────────────────────────────────────── */
.result-score-ring {
  width: 180px; height: 180px;
  border-radius: 50%;
  background: conic-gradient(var(--success) var(--pct, 0%), rgba(255,255,255,0.1) 0%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin: 0 auto;
}

.result-score-ring::before {
  content: '';
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  background: var(--secondary);
}

.result-score-text {
  position: relative;
  text-align: center;
  z-index: 1;
}

/* ── Certificate ────────────────────────────────────────────── */
.certificate-preview {
  border: 12px solid;
  border-image: linear-gradient(135deg, #F59E0B, #2563EB, #F59E0B) 1;
  padding: 3rem;
  background: #fff;
  position: relative;
  font-family: 'Poppins', serif;
}

/* ── Section Styling ───────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), #7C3AED);
  border-radius: 2px;
  margin: 1rem auto 0;
}

/* ── Steps ─────────────────────────────────────────────────── */
.step-item {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  padding: 1.2rem;
  border-radius: var(--radius);
  transition: var(--transition);
}

.step-item:hover {
  background: var(--primary-light);
}

.step-number {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), #7C3AED);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}

/* ── Prize Cards ───────────────────────────────────────────── */
.prize-card {
  text-align: center;
  padding: 2rem;
  border-radius: var(--radius-xl);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.prize-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(255,255,255,0.05));
}

.prize-gold   { background: linear-gradient(135deg, #92400E, #D97706); color: #fff; }
.prize-silver { background: linear-gradient(135deg, #374151, #6B7280); color: #fff; }
.prize-bronze { background: linear-gradient(135deg, #7C2D12, #CD7C32); color: #fff; }

.prize-icon { font-size: 3.5rem; margin-bottom: 1rem; display: block; }
.prize-amount { font-size: 2rem; font-weight: 800; }
.prize-label { font-size: 0.9rem; opacity: 0.85; }

/* ── FAQ ───────────────────────────────────────────────────── */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-question {
  padding: 1.1rem 1.3rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  transition: var(--transition);
  color: var(--secondary);
}

.faq-question:hover { background: var(--bg); }

.faq-answer {
  padding: 0 1.3rem 1.1rem;
  color: var(--text-muted);
  display: none;
  background: #fff;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer { display: block; }
.faq-item.open .faq-toggle { transform: rotate(180deg); }
.faq-toggle { transition: var(--transition); color: var(--primary); }

/* ── Footer ────────────────────────────────────────────────── */
.footer-olympiad {
  background: var(--secondary);
  color: rgba(255,255,255,0.7);
  padding: 4rem 0 2rem;
}

.footer-olympiad h5 {
  color: #fff;
  font-weight: 700;
  margin-bottom: 1.2rem;
}

.footer-olympiad a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: var(--transition);
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.footer-olympiad a:hover { color: #fff; padding-left: 4px; }

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  color: rgba(255,255,255,0.7) !important;
  font-size: 1rem;
  transition: var(--transition);
  margin-bottom: 0 !important;
  padding-left: 0 !important;
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff !important;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 1.5rem;
  margin-top: 3rem;
  text-align: center;
  font-size: 0.85rem;
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

.animate-fadeInUp { animation: fadeInUp 0.6s ease both; }
.animate-fadeIn   { animation: fadeIn 0.5s ease both; }

/* ── Language Toggle ───────────────────────────────────────── */
.lang-toggle {
  display: flex;
  background: rgba(255,255,255,0.1);
  border-radius: 50px;
  padding: 3px;
}

.lang-btn {
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  border: none;
  background: transparent;
}

.lang-btn.active {
  background: var(--primary);
  color: #fff;
}

/* ── Admission Card ────────────────────────────────────────── */
.admit-card {
  border: 3px solid var(--primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 600px;
  margin: 0 auto;
}

.admit-card-header {
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: #fff;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.admit-card-body {
  background: #fff;
  padding: 1.5rem;
}

/* ── Profile Photo ─────────────────────────────────────────── */
.photo-preview {
  width: 120px; height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--primary-light);
  box-shadow: var(--shadow);
}

.photo-upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.photo-upload-area:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* ── Notification Badge ────────────────────────────────────── */
.notif-badge {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--danger);
  color: #fff;
  width: 18px; height: 18px;
  border-radius: 50%;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Alert Styling ─────────────────────────────────────────── */
.alert {
  border-radius: var(--radius);
  border: none;
  font-weight: 500;
}

/* ── Table ─────────────────────────────────────────────────── */
.table-olympiad {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.table-olympiad thead th {
  background: var(--secondary);
  color: rgba(255,255,255,0.8);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 0.9rem 1rem;
  border: none;
}

.table-olympiad tbody td {
  padding: 0.85rem 1rem;
  vertical-align: middle;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.table-olympiad tbody tr:last-child td { border-bottom: none; }
.table-olympiad tbody tr:hover { background: var(--bg); }

/* ── Loading Spinner ───────────────────────────────────────── */
.spinner-olympiad {
  width: 48px; height: 48px;
  border: 4px solid rgba(37,99,235,0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Scroll to Top ─────────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 999;
  border: none;
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover { transform: translateY(-3px); }

/* ── Utility ───────────────────────────────────────────────── */
.bg-gradient-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.bg-gradient-dark    { background: linear-gradient(135deg, var(--secondary), #334155); }
.text-primary-custom { color: var(--primary) !important; }
.text-secondary-custom { color: var(--secondary) !important; }
.border-primary      { border-color: var(--primary) !important; }

.rounded-olympiad { border-radius: var(--radius-lg) !important; }
.shadow-olympiad  { box-shadow: var(--shadow-lg) !important; }

.bg-primary-light { background: var(--primary-light); }

.gap-custom { gap: 0.75rem; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 767.98px) {
  .hero-title { font-size: 1.8rem; }
  .stat-card { flex-direction: column; text-align: center; }
  .countdown-item { min-width: 60px; padding: 0.75rem 1rem; }
  .countdown-number { font-size: 1.8rem; }
  .question-card { padding: 1.2rem; }
  .prize-card { padding: 1.5rem; }
  .section-title { font-size: 1.5rem; }
}

/* ── Navbar Mobile Fix ─────────────────────────────────────── */
@media (max-width: 991.98px) {
  /* মোবাইলে header-এর right-side বাটনগুলো hide করো */
  .navbar-olympiad .navbar-actions .btn-olympiad,
  .navbar-olympiad .navbar-actions .btn-olympiad-outline,
  .navbar-olympiad .navbar-actions .lang-toggle,
  .navbar-olympiad .navbar-actions a.text-white {
    display: none !important;
  }

  /* শুধু toggler দেখাবে */
  .navbar-olympiad .navbar-actions {
    gap: 0.4rem;
  }

  /* Collapse হলে full-width menu */
  .navbar-olympiad .navbar-collapse {
    background: rgba(15, 23, 42, 0.98);
    border-top: 1px solid rgba(255,255,255,0.08);
    margin: 0 -12px;
    padding: 0 12px;
    border-radius: 0 0 var(--radius) var(--radius);
  }

  /* Mobile menu-এ lang toggle দেখাবে */
  .navbar-olympiad .navbar-collapse .lang-toggle {
    display: flex !important;
  }

  /* Mobile collapsed menu-এর btn স্টাইল */
  .navbar-collapse .navbar-mobile-btns {
    display: flex !important;
  }

  /* Brand font ছোট */
  .navbar-olympiad .navbar-brand {
    font-size: 1.15rem;
  }
}

@media print {
  .no-print { display: none !important; }
  body { background: #fff; }
  .admit-card, .certificate-preview { box-shadow: none; }
}