/* 宿舍安全闯关 · 样式 */

:root {
  --bg: #070b16;
  --text: #eaf0fb;
  --muted: #93a1bb;
  --line: rgba(255, 255, 255, .10);
  --panel: rgba(255, 255, 255, .045);
  --amber: #f5a524;
  --amber-soft: rgba(245, 165, 36, .12);
  --green: #22c55e;
  --red: #ef4444;
  --blue: #38bdf8;
  --violet: #a78bfa;
  --radius: 18px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body { min-height: 100%; }

body {
  margin: 0;
  padding: 28px 20px 44px;
  background:
    radial-gradient(1200px 620px at 12% -12%, rgba(245, 165, 36, .13), transparent 62%),
    radial-gradient(900px 520px at 92% 4%, rgba(56, 189, 248, .10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .028) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(circle at 50% 28%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 28%, #000 0%, transparent 78%);
}

.app {
  position: relative;
  z-index: 1;
  width: min(960px, 100%);
  margin: 0 auto;
  min-height: calc(100vh - 72px);
  display: flex;
  flex-direction: column;
}

/* ── 屏幕切换 ── */
.screen { display: none; }
.screen.is-active { display: block; margin: auto 0; width: 100%; animation: rise .34s cubic-bezier(.2, .7, .3, 1) both; }

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

/* ── 首页 ── */
.hero { text-align: center; padding: 14px 0 30px; }

.eyebrow {
  display: inline-block;
  padding: 6px 15px;
  border: 1px solid rgba(245, 165, 36, .35);
  border-radius: 999px;
  background: var(--amber-soft);
  color: #f7c46b;
  font-size: 12.5px;
  letter-spacing: .14em;
}

.hero h1 {
  margin: 20px 0 12px;
  font-size: clamp(34px, 6.4vw, 54px);
  letter-spacing: -.02em;
  line-height: 1.15;
  background: linear-gradient(115deg, #ffffff 8%, #ffd79a 52%, #f5a524 94%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin: 0 auto 28px;
  max-width: 620px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.best { margin: 18px 0 0; color: var(--muted); font-size: 13px; }
.best strong { color: #f7c46b; font-size: 15px; }

/* ── 按钮 ── */
.btn {
  padding: 13px 26px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, .05);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .16s, border-color .16s, background .16s, box-shadow .16s;
}

.btn:hover { transform: translateY(-1px); border-color: rgba(255, 255, 255, .28); background: rgba(255, 255, 255, .085); }
.btn:active { transform: none; }

.btn-primary {
  border: none;
  background: linear-gradient(135deg, #ffbe55, #f59400);
  color: #1c1204;
  box-shadow: 0 10px 30px rgba(245, 148, 0, .28);
}

.btn-primary:hover { box-shadow: 0 14px 34px rgba(245, 148, 0, .36); }

.btn-lg { padding: 16px 46px; font-size: 17px; border-radius: 15px; }

/* ── 分类卡片 ── */
.cats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 8px 0 22px;
}

.cat {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .055), rgba(255, 255, 255, .018));
}

.cat .cat-icon { font-size: 22px; line-height: 1; }
.cat .cat-name { margin: 10px 0 4px; font-size: 15px; font-weight: 650; }
.cat .cat-count { margin: 0; color: var(--muted); font-size: 12.5px; }
.cat .cat-bar { margin-top: 12px; height: 4px; border-radius: 99px; background: rgba(255, 255, 255, .09); overflow: hidden; }
.cat .cat-bar span { display: block; height: 100%; width: 0; border-radius: 99px; transition: width .8s ease .1s; }

.rules {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 13px;
}

.rules b { color: #f7c46b; font-weight: 650; }

/* ── 答题页 ── */
.quiz-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 14px;
  padding: 0 4px;
}

.qmeta { font-size: 13.5px; color: var(--muted); }
.qmeta strong { color: var(--text); font-size: 17px; font-variant-numeric: tabular-nums; }
.qmeta span { font-variant-numeric: tabular-nums; }

.score-line { margin-left: auto; font-size: 13.5px; color: var(--muted); }
.score-line strong { color: #f7c46b; font-size: 19px; font-variant-numeric: tabular-nums; }

.timer { position: relative; width: 62px; height: 62px; flex: 0 0 auto; }
.timer svg { display: block; width: 100%; height: 100%; transform: rotate(-90deg); }
.timer circle { fill: none; stroke-width: 5.5; stroke-linecap: round; }
.ring-bg { stroke: rgba(255, 255, 255, .10); }
.ring-fg { stroke: var(--amber); stroke-dasharray: 194.8; stroke-dashoffset: 0; transition: stroke .2s; }
.timer.low .ring-fg { stroke: var(--red); }

.timer-num {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.timer.low .timer-num { color: #f87171; animation: pulse .7s ease-in-out infinite; }

@keyframes pulse { 50% { transform: scale(1.12); } }

.icon-btn {
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 255, 255, .04);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
}

.icon-btn:hover { background: rgba(255, 255, 255, .09); }

.card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .055), rgba(255, 255, 255, .015));
  box-shadow: 0 26px 60px rgba(0, 0, 0, .35);
}

.quiz-card { padding: clamp(20px, 4vw, 34px); }

.progress { height: 4px; border-radius: 99px; background: rgba(255, 255, 255, .08); overflow: hidden; }
.progress-fill {
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, #f5a524, #ffd89b);
  transition: width .3s ease;
}

.chip {
  display: inline-block;
  margin: 20px 0 0;
  padding: 5px 13px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  border: 1px solid currentColor;
  opacity: .95;
}

.qtext {
  margin: 16px 0 22px;
  font-size: clamp(17px, 2.5vw, 21px);
  font-weight: 650;
  line-height: 1.72;
  letter-spacing: -.005em;
}

.options { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.opt {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .03);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: border-color .16s, background .16s, transform .16s, opacity .3s;
}

.opt:hover:not(:disabled) {
  border-color: rgba(245, 165, 36, .55);
  background: rgba(245, 165, 36, .08);
  transform: translateY(-1px);
}

.opt:disabled { cursor: default; }

.opt-key {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 25px; height: 25px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.opt.correct { border-color: var(--green); background: rgba(34, 197, 94, .14); }
.opt.correct .opt-key { background: rgba(34, 197, 94, .28); color: #86efac; }
.opt.wrong { border-color: var(--red); background: rgba(239, 68, 68, .14); }
.opt.wrong .opt-key { background: rgba(239, 68, 68, .26); color: #fca5a5; }
.opt.muted { opacity: .42; }

.feedback { min-height: 22px; margin: 16px 0 0; font-size: 14px; font-weight: 600; }
.feedback.ok { color: #4ade80; }
.feedback.no { color: #f87171; }

.hint { margin: 16px 0 0; text-align: center; color: var(--muted); font-size: 12.5px; }
.hint b { color: #cbd5e1; }

/* ── 结算页 ── */
.ring-score {
  --p: 0%;
  width: 168px; height: 168px;
  margin: 6px auto 20px;
  border-radius: 50%;
  background: conic-gradient(#f5a524 var(--p), rgba(255, 255, 255, .08) 0);
  display: grid;
  place-items: center;
  position: relative;
  box-shadow: 0 0 50px rgba(245, 165, 36, .18);
}

.ring-score::after {
  content: "";
  position: absolute;
  inset: 11px;
  border-radius: 50%;
  background: #0b1120;
}

.ring-inner { position: relative; z-index: 1; display: flex; align-items: baseline; gap: 4px; }
.ring-inner .big {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, #fff, #ffd79a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ring-inner .of { color: var(--muted); font-size: 14px; }

.rank { margin: 0 0 8px; text-align: center; font-size: 23px; letter-spacing: -.01em; }
.rank-desc { margin: 0 auto 26px; max-width: 560px; text-align: center; color: var(--muted); font-size: 14px; line-height: 1.8; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }

.stat {
  padding: 16px 10px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255, 255, 255, .03);
  text-align: center;
}

.stat .v { display: block; font-size: 25px; font-weight: 800; font-variant-numeric: tabular-nums; }
.stat .v.ok { color: #4ade80; }
.stat .v.bad { color: #f87171; }
.stat .v.dim { color: #cbd5e1; }
.stat .l { display: block; margin-top: 5px; color: var(--muted); font-size: 12.5px; }

.catbars { margin: 22px 0 0; display: grid; gap: 14px; }

.catbar-head { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 7px; }
.catbar-head .num { color: var(--muted); font-variant-numeric: tabular-nums; }
.catbar-track { height: 7px; border-radius: 99px; background: rgba(255, 255, 255, .08); overflow: hidden; }
.catbar-track span { display: block; height: 100%; width: 0; border-radius: 99px; transition: width .7s ease .15s; }

.review { margin: 26px 0 0; }

.review-toggle {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, .04);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.review-toggle:hover { background: rgba(255, 255, 255, .08); }

.review-list { margin-top: 12px; display: grid; gap: 8px; }

.rev {
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, .028);
  overflow: hidden;
}

.rev summary {
  display: flex;
  gap: 10px;
  padding: 13px 15px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.6;
  list-style: none;
}

.rev summary::-webkit-details-marker { display: none; }
.rev summary .st { flex: 0 0 auto; font-weight: 700; }
.rev.ok summary .st { color: #4ade80; }
.rev.bad summary .st { color: #f87171; }
.rev.miss summary .st { color: #94a3b8; }

.rev-body { padding: 0 15px 14px 41px; color: var(--muted); font-size: 13.5px; line-height: 1.85; }
.rev-body b { color: #f7c46b; }
.rev-body .right { color: #86efac; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin: 30px 0 0; }

/* ── 响应式 ── */
@media (max-width: 720px) {
  body { padding: 20px 14px 36px; }
  .cats { grid-template-columns: 1fr; }
  .options { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .quiz-head { gap: 12px; }
  .qmeta strong { font-size: 15px; }
  .timer { width: 54px; height: 54px; }
  .timer-num { font-size: 17px; }
  .ring-score { width: 146px; height: 146px; }
  .ring-inner .big { font-size: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}