/* ============================================================
   EduQuest ESAT Design System (index.css)
   Engineering & Science Admissions Test Platform
   ============================================================ */

:root {
  --bg: #0d0d14;
  --surface: #141422;
  --surface-card: rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  
  --primary: #3b82f6;
  --primary-glow: rgba(59, 130, 246, 0.25);
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --text-main: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.6);
  --text-dim: rgba(255, 255, 255, 0.4);
  
  --font-heading: 'Syne', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

select, select option {
  background-color: #141422 !important;
  color: #ffffff !important;
}

/* ── HEADER ─────────────────────────────────────────────────── */
.hdr {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 13, 20, 0.95);
  backdrop-filter: blur(14px);
  z-index: 100;
}

.brand {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fff;
}

.brand-icon {
  font-size: 1.3rem;
}

.brand-pill {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  padding: 3px 9px;
  border-radius: 5px;
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.hdr-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hdr-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s;
  padding: 6px 12px;
  border-radius: 6px;
}

.hdr-link:hover {
  color: #fff;
  background: var(--surface-hover);
}

.hdr-btn-primary {
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.hdr-btn-primary:hover {
  background: #2563eb;
  box-shadow: 0 4px 14px var(--primary-glow);
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px 24px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.3);
  color: #38bdf8;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero h1 span {
  background: linear-gradient(135deg, #38bdf8, #818cf8, #c084fc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 720px;
  margin: 0 auto 36px auto;
  line-height: 1.6;
}

/* ── TABS ───────────────────────────────────────────────────── */
.tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--surface-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 10px 20px;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn:hover {
  background: var(--surface-hover);
  color: #fff;
}

.tab-btn.active {
  background: rgba(59, 130, 246, 0.18);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ── CARDS GRID ─────────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  text-align: left;
}

.exam-card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.exam-card:hover {
  transform: translateY(-3px);
  border-color: rgba(59, 130, 246, 0.4);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.card-num {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

.card-sub {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 20px;
  flex: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
  margin-top: auto;
}

.tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
}

.tag-compulsory {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.tag-elective {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.tag-full {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.card-btn {
  background: rgba(59, 130, 246, 0.18);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #93c5fd;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: 8px;
  transition: all 0.2s;
}

.card-btn:hover {
  background: var(--primary);
  color: #fff;
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 60px;
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hdr { padding: 0 16px; }
  .hero h1 { font-size: 2.1rem; }
  .cards { grid-template-columns: 1fr; }
}