:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --ink: #1d2433;
  --muted: #5f6b7d;
  --line: #dde1e8;
  --accent: #2346a8;
  --accent-soft: #e7ecfa;
  --ok: #1d7a4c;
  --ok-soft: #e3f3ea;
  --warn: #b25b00;
  --warn-soft: #fff1df;
  --bad: #b3261e;
  --bad-soft: #fde8e6;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: Pretendard, 'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}
body.locked { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }
.hidden { display: none !important; }

/* 공통 */
.wrap { max-width: 640px; margin: 0 auto; padding: 32px 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
h1 { font-size: 24px; margin: 0 0 4px; letter-spacing: -0.02em; }
.sub { color: var(--muted); margin: 0 0 20px; }
.btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 10px; padding: 10px 16px; min-height: 44px;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn.primary:disabled { opacity: .45; cursor: default; }
.btn.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn.block { width: 100%; }
label.field { display: block; margin-bottom: 14px; }
label.field span { display: block; font-size: 14px; color: var(--muted); margin-bottom: 4px; }
label.field input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: #fff;
}
label.field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.rules { background: var(--warn-soft); border: 1px solid #f3d3a8; border-radius: 10px; padding: 14px 16px; margin: 4px 0 18px; font-size: 15px; }
.rules strong { color: var(--warn); }
.rules ul { margin: 6px 0 0; padding-left: 20px; }
.check { display: flex; gap: 10px; align-items: flex-start; margin: 0 0 18px; font-size: 15px; }
.check input { width: 20px; height: 20px; margin-top: 3px; flex: none; }
.msg { min-height: 24px; color: var(--bad); font-size: 15px; margin-top: 10px; }
.meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.pill { font-size: 13px; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

/* 시험 고르기 */
.examrow { display: block; text-decoration: none; color: var(--ink); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin-bottom: 10px; }
.examrow:hover { border-color: var(--accent); background: var(--accent-soft); }
.examrow b { display: block; font-size: 18px; }
.examrow span { font-size: 14px; color: var(--muted); }
.examrow em { font-style: normal; color: var(--ok); font-weight: 700; }

/* 대기실 */
.lobby-state { background: #f8f9fb; border: 1px solid var(--line); border-radius: 12px; padding: 22px 16px; margin: 6px 0 18px; }
.lobby-state .big { font-size: 20px; font-weight: 700; margin: 10px 0 4px; }
.lobby-state .muted { margin: 0; }
.lobby-state.go { background: var(--ok-soft); border-color: #b9e0c9; }
.lobby-state.go .big { color: var(--ok); }
.dots { display: flex; gap: 8px; justify-content: center; height: 12px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); opacity: .25; animation: blink 1.2s infinite; }
.dots i:nth-child(2) { animation-delay: .2s; }
.dots i:nth-child(3) { animation-delay: .4s; }
.go .dots i { background: var(--ok); animation: none; opacity: 1; }
@keyframes blink { 50% { opacity: 1; } }
.startbig { min-height: 64px; font-size: 20px; }
.startbig.ready { background: var(--ok); border-color: var(--ok); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(29, 122, 76, .45); } 50% { box-shadow: 0 0 0 10px rgba(29, 122, 76, 0); } }
@media (prefers-reduced-motion: reduce) { .dots i, .startbig.ready { animation: none; } }
.waitlist { display: flex; flex-wrap: wrap; gap: 6px; }
.waitlist span { font-size: 14px; padding: 4px 10px; border-radius: 999px; background: var(--ok-soft); color: var(--ok); border: 1px solid #b9e0c9; }
.waitlist span.off { background: #f1f2f4; color: var(--muted); border-color: var(--line); }
.waitlist button { border: 0; background: none; color: inherit; padding: 0 0 0 4px; font-size: 13px; }
.bigstart { font-size: 18px; min-height: 52px; padding: 10px 22px; }

/* 시험 화면 */
.topbar {
  position: sticky; top: 0; z-index: 5; background: #fff; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 12px; padding: 10px 16px; flex-wrap: wrap;
}
.topbar .who { font-size: 14px; color: var(--muted); }
.topbar .timer { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 20px; margin-left: auto; }
.topbar .timer.low { color: var(--bad); }
.topbar .count { font-size: 14px; color: var(--muted); }
.save { font-size: 13px; color: var(--muted); }
.save.bad { color: var(--bad); font-weight: 600; }
.layout { display: grid; grid-template-columns: 1fr; gap: 16px; max-width: 1100px; margin: 0 auto; padding: 16px; }
@media (min-width: 1000px) { .layout { grid-template-columns: 1fr 300px; } .gridbtn { display: none; } }
@media (max-width: 999px) { .side { display: none; } .side.open { display: block; } }
.qhead { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; color: var(--muted); font-size: 15px; }
.qno { font-weight: 700; color: var(--ink); font-size: 18px; }
.qtext { font-size: 20px; line-height: 1.65; margin: 0 0 22px; word-break: keep-all; }
.choices { display: grid; gap: 10px; }
.choices.ox { grid-template-columns: 1fr 1fr; }
.choice {
  text-align: left; border: 2px solid var(--line); background: #fff; border-radius: 12px;
  padding: 14px 16px; min-height: 56px; display: flex; gap: 12px; align-items: flex-start; word-break: keep-all;
}
.choice .mk { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--line); display: grid; place-items: center; font-size: 14px; font-weight: 700; color: var(--muted); }
.choices.ox .choice { justify-content: center; align-items: center; font-size: 34px; font-weight: 800; min-height: 110px; }
.choice.sel { border-color: var(--accent); background: var(--accent-soft); }
.choice.sel .mk { background: var(--accent); border-color: var(--accent); color: #fff; }
.nav { display: flex; justify-content: space-between; gap: 10px; margin-top: 22px; }
.nav .btn { min-width: 110px; }
.grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 5px; }
.grid button {
  border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 0; height: 30px; font-size: 12px; color: var(--muted);
}
.grid button.done { background: var(--accent); border-color: var(--accent); color: #fff; }
.grid button.cur { outline: 2px solid var(--ink); outline-offset: 1px; }
.side h3 { font-size: 15px; margin: 0 0 10px; }
.side .legend { font-size: 13px; color: var(--muted); margin-top: 10px; }

/* 덮개 */
.overlay { position: fixed; inset: 0; z-index: 50; background: rgba(20, 24, 33, .72); display: grid; place-items: center; padding: 16px; }
.overlay .card { max-width: 460px; width: 100%; text-align: center; }
.overlay .big { font-size: 22px; font-weight: 700; margin: 0 0 8px; }
.overlay p { color: var(--muted); margin: 0 0 18px; }
.overlay .row { display: flex; gap: 10px; justify-content: center; }
.ended { text-align: center; }
.ended .icon { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; margin: 0 auto 14px; font-size: 30px; font-weight: 800; }
.ended .icon.ok { background: var(--ok-soft); color: var(--ok); }
.ended .icon.bad { background: var(--bad-soft); color: var(--bad); }
.ended .score { font-size: 40px; font-weight: 800; margin: 8px 0; }

/* 관리자 */
.admin { max-width: 1280px; margin: 0 auto; padding: 20px 16px 60px; }
.admin h2 { font-size: 17px; margin: 0 0 12px; }
.row2 { display: grid; grid-template-columns: 1fr; gap: 16px; margin-bottom: 16px; }
@media (min-width: 900px) { .row2 { grid-template-columns: 1fr 1fr; } }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-bottom: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.stat b { display: block; font-size: 26px; font-variant-numeric: tabular-nums; }
.stat span { font-size: 13px; color: var(--muted); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
.form-grid label { font-size: 14px; color: var(--muted); }
th.num { text-align: right; }
.form-grid input[type=text], .form-grid input[type=number], .form-grid input[type=date], .form-grid input[type=time] {
  display: block; font-size: 15px; background: #fff; width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; margin-top: 3px; color: var(--ink); }
.form-grid .wide { grid-column: 1 / -1; }
.switch { display: flex; align-items: center; gap: 8px; color: var(--ink) !important; }
.switch input { width: 18px; height: 18px; }
.tablewrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { background: #f8f9fb; font-weight: 600; color: var(--muted); position: sticky; top: 0; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.sel td { background: var(--accent-soft); }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.tag.run { background: var(--accent-soft); color: var(--accent); }
.tag.ok { background: var(--ok-soft); color: var(--ok); }
.tag.bad { background: var(--bad-soft); color: var(--bad); }
.tag.warn { background: var(--warn-soft); color: var(--warn); }
.mini { padding: 4px 8px; min-height: 0; font-size: 13px; border-radius: 7px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }
.toolbar .grow { flex: 1; }
textarea.roster { width: 100%; min-height: 140px; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; font-size: 14px; }
.muted { color: var(--muted); font-size: 13px; }
.bar { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; min-width: 80px; }
.bar i { display: block; height: 100%; background: var(--accent); }
.openbtn.on { background: var(--ok); border-color: var(--ok); color: #fff; }