:root {
  --bg: #0b0f19;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #60a5fa;
  --danger: #f87171;
  --success: #34d399;
  --border: rgba(255,255,255,0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: linear-gradient(180deg, #0b0f19 0%, #090c14 100%);
  color: var(--text);
}

.container {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.nav a, .linklike {
  color: var(--muted);
  text-decoration: none;
  margin-left: 12px;
  font-size: 14px;
}

.nav a:hover { color: var(--text); }

.inline { display: inline; }
.linklike {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

main.container { padding: 24px 0 60px; }

.hero {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(17, 24, 39, 0.7);
}

.card {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(17, 24, 39, 0.7);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 900px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}

.actions { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #0b1220;
  padding: 10px 14px;
  border-radius: 10px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-weight: 700;
}

.btn.secondary {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.tiny { padding: 6px 10px; font-size: 12px; border-radius: 8px; }

.form label { display: block; margin-top: 10px; color: var(--muted); font-size: 13px; }
.form input, .form select, .form textarea {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
  color: var(--text);
}

.muted { color: var(--muted); }
.small { font-size: 12px; }
.divider { height: 1px; background: var(--border); margin: 14px 0; }

.flash-wrap { margin-top: 14px; }
.flash {
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
}
.flash.success { border-color: rgba(52, 211, 153, 0.35); }
.flash.error { border-color: rgba(248, 113, 113, 0.35); }

.success-text { color: var(--success); }
.error-text { color: var(--danger); }

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  font-size: 14px;
}
.table th, .table td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}
.table th { color: var(--muted); font-weight: 600; }

.code {
  white-space: pre-wrap;
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 10px;
  overflow-x: auto;
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 1000px) {
  .layout {
    grid-template-columns: 320px 1fr;
    align-items: start;
  }
}
.sidebar { position: sticky; top: 74px; }
.timer { margin-top: 6px; }
.timer-label { color: var(--muted); font-size: 12px; }
.timer-value { font-size: 20px; font-weight: 800; margin-top: 4px; }

.question-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
}
.q-prompt { font-size: 16px; line-height: 1.5; margin-top: 10px; }
.q-choices { margin-top: 12px; }
.choice {
  display: flex;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 10px;
  background: rgba(0,0,0,0.18);
  cursor: pointer;
}
.choice input { margin-top: 3px; }
.choice:hover { border-color: rgba(96, 165, 250, 0.35); }

.q-nav { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.nav-pills { display: flex; gap: 6px; flex-wrap: wrap; }
.pill {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  background: rgba(0,0,0,0.15);
  font-size: 13px;
}
.pill.active { border-color: rgba(96, 165, 250, 0.55); }
.pill.answered { background: rgba(52, 211, 153, 0.12); }
.pill.marked { outline: 2px solid rgba(248, 113, 113, 0.55); }

.q-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }