:root {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --primary: #1e3a8a;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --border: #cbd5e1;
  --success: #16a34a;
  --danger: #dc2626;
  --gold: #d97706;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #38bdf8;
  --accent: #0ea5e9;
  --accent-soft: rgba(56, 189, 248, 0.1);
  --border: #334155;
  --success: #4ade80;
  --danger: #f87171;
  --gold: #fbbf24;
  --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-user-select: none;
  user-select: none;
}

.navbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.container {
  max-width: 1150px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px;
  flex: 1;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 9999px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
}

button {
  border-radius: 6px;
  border: none;
  padding: 9px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
  transition: opacity 0.2s;
}

button:disabled { opacity: 0.5; cursor: not-allowed; }
[data-theme="dark"] button { color: #0f172a; }

button.secondary {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border);
}

button.danger {
  background: var(--danger);
  color: #fff;
}

.choice-item {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  display: flex;
  gap: 10px;
}

.choice-item.correct { background: rgba(22, 163, 74, 0.12); border-color: var(--success); }
.choice-item.incorrect { background: rgba(220, 38, 38, 0.12); border-color: var(--danger); }

.timer-pill {
  font-family: monospace;
  font-size: 1rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  background: #f1f5f9;
  color: #0f172a;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
}

.timer-pill.warning {
  background: rgba(220, 38, 38, 0.15);
  color: var(--danger);
  border-color: var(--danger);
}

.program-tier-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg);
}

.review-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  margin-top: 16px;
  text-align: left;
  background: var(--card-bg);
}

.review-item.pass { border-left: 5px solid var(--success); }
.review-item.fail { border-left: 5px solid var(--danger); }

.rule-box {
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--bg);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  font-size: 0.88rem;
  line-height: 1.5;
}

.review-choice {
  padding: 8px 12px;
  border-radius: 6px;
  margin: 4px 0;
  font-size: 0.88rem;
  display: flex;
  justify-content: space-between;
  border: 1px solid transparent;
}

.review-choice.was-correct {
  background: rgba(22, 163, 74, 0.1);
  border-color: var(--success);
  color: var(--success);
  font-weight: 600;
}

.review-choice.was-incorrect {
  background: rgba(220, 38, 38, 0.1);
  border-color: var(--danger);
  color: var(--danger);
  font-weight: 600;
}

.visual-wrapper {
  text-align: center;
  margin: 14px 0;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 16px;
}

.nav-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 10px 18px;
  font-size: 0.95rem;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
}

.nav-tab-btn.active {
  color: var(--primary);
  border-bottom: 3px solid var(--primary);
  font-weight: 700;
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 12px;
}

table.data-table th, table.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

table.data-table th {
  background: var(--bg);
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
}

/* Custom In-Progress Slots Grid */
.in-progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.test-slot-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin: 10px 0;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
}

@media print {
  body * { visibility: hidden; }
  #view-certificate, #view-certificate * { visibility: visible; }
  #view-certificate { position: absolute; left: 0; top: 0; width: 100%; }
  .no-print { display: none !important; }
}