@import url('../fonts/kantumruy-pro.css');
@import url('../katex/katex.min.css');

:root {
  --ink: #1f2b33;
  --muted: #5b6b76;
  --line: #dbe3e8;
  --bg: #f6f8f9;
  --card: #ffffff;
  --brand: #1a6fae;
  --brand-dark: #125680;
  --good: #1f8a4c;
  --bad: #c6382f;
  --warn: #b8860b;
}

/* A class that sets display:flex/block on an element also carrying the [hidden]
   attribute would otherwise win over the browser's default [hidden]{display:none} —
   force hidden to always actually hide. */
[hidden] { display: none !important; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Kantumruy Pro', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--brand); text-decoration: none; }

.wrap { max-width: 760px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; color: var(--muted); }
.muted { color: var(--muted); font-size: 14px; }

label { display: block; font-size: 14px; margin: 10px 0 4px; color: var(--muted); }
input[type=text], input[type=password], input[type=number], input[type=datetime-local], textarea, select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  font-family: inherit; font-size: 16px; background: #fff; color: var(--ink);
}
textarea { resize: vertical; min-height: 60px; }

button, .btn {
  display: inline-block; border: none; border-radius: 8px; padding: 10px 16px;
  font-family: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  background: var(--brand); color: #fff;
}
button:hover, .btn:hover { background: var(--brand-dark); }
button.secondary { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
button.danger { background: #fff; color: var(--bad); border: 1px solid var(--bad); }
button:disabled { opacity: .5; cursor: not-allowed; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.error { background: #fdecea; border: 1px solid #f3c2bd; color: var(--bad); padding: 8px 12px; border-radius: 8px; margin: 10px 0; font-size: 14px; }
.notice { background: #eef6ff; border: 1px solid #c9e2f7; color: var(--brand-dark); padding: 8px 12px; border-radius: 8px; margin: 10px 0; font-size: 14px; }

.tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.tabs button { background: #fff; color: var(--muted); border: 1px solid var(--line); font-weight: 600; }
.tabs button.active { background: var(--brand); color: #fff; border-color: var(--brand); }

.list-item { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); gap: 10px; }
.list-item:last-child { border-bottom: none; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 99px; font-size: 12px; font-weight: 600; }
.badge.open { background: #e4f6ea; color: var(--good); }
.badge.upcoming { background: #fff3da; color: var(--warn); }
.badge.closed { background: #eceff1; color: var(--muted); }
.badge.draft { background: #eceff1; color: var(--muted); }
.badge.ready { background: #e4f6ea; color: var(--good); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 7px 8px; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--muted); font-weight: 600; }
td input[type=number] { width: 70px; padding: 6px 8px; }

/* MCQ widget — a real on-screen list of choices, not a bare <ul> */
.radio-list { display: flex; flex-direction: column; gap: 8px; margin: 10px 0; }
.radio-opt {
  display: flex; align-items: flex-start; gap: 10px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; cursor: pointer; background: #fff;
}
.radio-opt:hover { background: #f2f7fb; }
.radio-opt.selected { border-color: var(--brand); background: #eef6ff; }
.radio-opt input[type=radio] { width: 18px; height: 18px; flex: none; margin: 2px 0 0; accent-color: var(--brand); cursor: pointer; }
.radio-opt .opt-body { min-width: 0; }

/* math-typing toolbar + live preview (see js/mathtype.js) */
.mathbar { display: flex; flex-wrap: wrap; gap: 4px; margin: 4px 0; padding: 4px; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; }
.mk { min-width: 36px; height: 34px; padding: 0 8px; display: inline-grid; place-items: center; font-size: 16px; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 4px; cursor: pointer; font-weight: 400; }
.mk:hover { border-color: var(--brand); background: #f1f8fd; }
.mk sup { font-size: 0.7em; }
.mk-frac { display: inline-flex; flex-direction: column; align-items: center; font-size: 11px; line-height: 1.05; }
.mk-frac i:first-child { border-bottom: 1px solid currentColor; padding: 0 2px; font-style: normal; }
.mk-frac i { font-style: normal; }
.mpv { margin: 2px 0 8px; padding: 6px 10px; font-size: 15px; line-height: 1.8; background: #eef6ff; border-left: 3px solid var(--brand); border-radius: 0 6px 6px 0; overflow-x: auto; }
.mpv[hidden] { display: none; }
.mpv-lbl { font-size: 12.5px; color: var(--muted); }

.question-card { border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin-bottom: 14px; background: #fff; }
.question-card img { max-width: 100%; border-radius: 6px; margin: 8px 0; }
.question-nav { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 16px; }
.question-nav button { width: 36px; height: 36px; padding: 0; background: #fff; color: var(--ink); border: 1px solid var(--line); font-weight: 600; }
.question-nav button.answered { background: #e4f6ea; border-color: var(--good); color: var(--good); }
.question-nav button.current { outline: 2px solid var(--brand); }

.timer { position: sticky; top: 0; z-index: 5; background: var(--card); border-bottom: 1px solid var(--line); padding: 10px 16px; display: flex; justify-content: space-between; align-items: center; font-weight: 600; }
.timer.low { color: var(--bad); }

.center-screen { min-height: 70vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 24px; }
.big-score { font-size: 40px; font-weight: 700; color: var(--brand); }

.pin-sheet { font-family: 'Kantumruy Pro', system-ui; }
.pin-sheet table { font-size: 15px; }
@media print { .no-print { display: none !important; } }