:root {
  --navy: #0f2540;
  --navy-light: #1b3a63;
  --blue: #2563eb;
  --green: #15803d;
  --red: #b91c1c;
  --amber: #b45309;
  --bg: #f4f6fa;
  --card-bg: #ffffff;
  --border: #d8dee8;
  --text: #1a2233;
  --muted: #5b6577;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  flex-wrap: wrap;
  gap: 10px;
}

.brand { font-size: 1.15rem; font-weight: 700; }
.brand-sub { font-weight: 400; opacity: .75; font-size: .85rem; margin-left: 8px; }

.topnav { display: flex; gap: 8px; }
.navbtn {
  background: transparent;
  border: 1px solid rgba(255,255,255,.35);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: .9rem;
}
.navbtn.active, .navbtn:hover { background: rgba(255,255,255,.15); }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 60px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
}

h1 { margin-top: 0; font-size: 1.5rem; }
h2 { margin-top: 0; }

.field {
  display: block;
  margin: 14px 0;
}
.field span { display: block; font-size: .85rem; color: var(--muted); margin-bottom: 4px; }
.field input, .field select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .95rem;
}
.field.small { display: inline-block; width: 48%; margin-right: 2%; vertical-align: top; }

.start-options { margin: 10px 0; }

.btn {
  padding: 10px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: .9rem;
}
.btn:hover { background: #f0f2f6; }
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: var(--red); color: #fff; border-color: var(--red); }
.btn-danger:hover { background: #991b1b; }
.btn-flag { background: #fff7ed; border-color: #fdba74; color: var(--amber); }
.btn-lg { font-size: 1.05rem; padding: 13px 22px; }

.pool-status { font-size: .8rem; color: var(--muted); margin-top: 14px; }

/* EXAM */
.exam-topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 18px; margin-bottom: 14px; position: sticky; top: 0; z-index: 5;
  flex-wrap: wrap; gap: 10px;
}
.exam-progress { font-weight: 600; }
.exam-timer {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 1.3rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 6px;
  background: #eef2ff;
  color: var(--navy);
}
.exam-timer.low { background: #fee2e2; color: var(--red); }

.exam-body { display: flex; gap: 18px; align-items: flex-start; }

.question-palette {
  width: 210px;
  flex: none;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  position: sticky;
  top: 76px;
  max-height: 70vh;
  overflow-y: auto;
}
.pal-btn {
  width: 100%; aspect-ratio: 1;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: #f8f9fb;
  font-size: .78rem;
  cursor: pointer;
}
.pal-btn.current { outline: 2px solid var(--blue); }
.pal-btn.answered { background: #dcfce7; border-color: #86efac; }
.pal-btn.flagged { background: #fef3c7; border-color: #fcd34d; }
.pal-btn.answered.flagged { background: linear-gradient(135deg,#dcfce7 50%,#fef3c7 50%); }

.question-panel {
  flex: 1;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  min-height: 380px;
}

.scenario-box {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 16px;
  font-size: .92rem;
}
.scenario-box h4 { margin: 0 0 6px; font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }

.q-meta { font-size: .78rem; color: var(--muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .03em; }
.q-stem { font-size: 1.05rem; margin-bottom: 16px; line-height: 1.5; }

.q-options { display: flex; flex-direction: column; gap: 8px; }
.q-option {
  display: flex; align-items: flex-start; gap: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
}
.q-option:hover { background: #f8fafc; }
.q-option input { margin-top: 3px; }
.q-option.selected { border-color: var(--blue); background: #eff6ff; }

.order-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.order-item {
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
  background: #f8fafc; display: flex; align-items: center; gap: 10px; cursor: grab;
}
.order-item .handle { color: var(--muted); font-size: .85rem; }
.order-item.dragging { opacity: .4; }

.match-grid { display: flex; flex-direction: column; gap: 10px; }
.match-row { display: flex; align-items: center; gap: 12px; }
.match-row .match-left { flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; background: #f8fafc; }
.match-row select { flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }

.question-nav { display: flex; justify-content: space-between; margin-top: 22px; }

/* RESULTS */
.score-hero { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.score-number { font-size: 3rem; font-weight: 800; }
.score-number.pass { color: var(--green); }
.score-number.fail { color: var(--red); }
.pass-pill {
  display: inline-block; padding: 6px 14px; border-radius: 999px; font-weight: 700; font-size: .85rem;
}
.pass-pill.pass { background: #dcfce7; color: var(--green); }
.pass-pill.fail { background: #fee2e2; color: var(--red); }

.domain-bar-row { display: flex; align-items: center; gap: 10px; margin: 8px 0; }
.domain-bar-label { width: 190px; font-size: .85rem; }
.domain-bar-track { flex: 1; background: #eef1f5; border-radius: 6px; height: 14px; overflow: hidden; }
.domain-bar-fill { height: 100%; background: var(--blue); }
.domain-bar-pct { width: 50px; text-align: right; font-size: .8rem; color: var(--muted); }

.missed-item { border-bottom: 1px solid var(--border); padding: 14px 0; }
.missed-item:last-child { border-bottom: none; }
.missed-q { font-weight: 600; margin-bottom: 6px; }
.missed-answers { font-size: .88rem; margin: 4px 0; }
.missed-answers .wrong { color: var(--red); }
.missed-answers .right { color: var(--green); }
.missed-explain { font-size: .88rem; color: var(--muted); margin-top: 6px; }

.results-actions { display: flex; gap: 10px; }

/* HISTORY */
table.history-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: .88rem; }
table.history-table th, table.history-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
table.history-table th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; }
.badge-pass { color: var(--green); font-weight: 700; }
.badge-fail { color: var(--red); font-weight: 700; }

.muted { color: var(--muted); font-size: .88rem; }

.footer { text-align: center; padding: 20px; font-size: .78rem; color: var(--muted); }

@media (max-width: 800px) {
  .exam-body { flex-direction: column; }
  .question-palette { width: 100%; position: static; grid-template-columns: repeat(8, 1fr); max-height: none; }
  .field.small { width: 100%; margin-right: 0; }
}