:root,
html[data-theme="light"] {
  color-scheme: light;
  --ink: #1c1917;
  --muted: #57534e;
  --paper: #f6f0e6;
  --sheet: #fffdf8;
  --line: #e7dcc8;
  --stamp: #b42318;
  --navy: #1e3a5f;
  --ok: #157f3d;
  --bad: #b42318;
  --warn: #b45309;
  --chip: #eef3f8;
  --code-bg: #1e293b;
  --opt-bg: #ffffff;
  --opt-on: #eef4fb;
  --opt-hover: #8aa4c2;
  --opt-ok-bg: #edf8f0;
  --opt-bad-bg: #fdecec;
  --notice-bg: #fff8e8;
  --notice-bd: #d6b56a;
  --why-bad-bg: #fff4f4;
  --why-good-bg: #eef8f1;
  --code-chip: #f0eadc;
  --bar: rgba(30, 58, 95, 0.96);
  --dock: rgba(255, 253, 248, 0.96);
  --glow-a: #efe4d2;
  --glow-b: #e4eef2;
  --fill-line: #c4b8a4;
  --shadow: rgba(80, 50, 20, 0.08);
  --btn-ghost-bg: #ffffff;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --ink: #ece8e1;
  --muted: #b0a89d;
  --paper: #12161d;
  --sheet: #1b222c;
  --line: #3a4556;
  --stamp: #f08080;
  --navy: #8ec0ea;
  --ok: #4ade80;
  --bad: #f08080;
  --warn: #fbbf24;
  --chip: #243044;
  --code-bg: #0b1220;
  --opt-bg: #151c26;
  --opt-on: #243b55;
  --opt-hover: #6b93b8;
  --opt-ok-bg: #16351f;
  --opt-bad-bg: #3a1c1c;
  --notice-bg: #2a2416;
  --notice-bd: #8a6a2b;
  --why-bad-bg: #3a1c1c;
  --why-good-bg: #16351f;
  --code-chip: #2a3340;
  --bar: rgba(10, 16, 26, 0.96);
  --dock: rgba(18, 22, 29, 0.96);
  --glow-a: #1a2433;
  --glow-b: #1b2836;
  --fill-line: #6b7280;
  --shadow: rgba(0, 0, 0, 0.35);
  --btn-ghost-bg: #1b222c;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", "Microsoft YaHei", serif;
  background:
    radial-gradient(circle at 8% 0%, var(--glow-a) 0, transparent 42%),
    radial-gradient(circle at 100% 20%, var(--glow-b) 0, transparent 36%),
    var(--paper);
  color: var(--ink);
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a { color: var(--navy); }

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 12px 28px;
  background: var(--bar);
  color: #fff;
  backdrop-filter: blur(8px);
}
.topbar a { color: #fff; text-decoration: none; }
.top-link {
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.28);
  background: rgba(255,255,255,0.12);
  border-radius: 999px;
  padding: 6px 12px;
  white-space: nowrap;
}
.top-link:hover { background: rgba(255,255,255,0.2); }
.user-chip {
  display: flex; align-items: center; gap: 8px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: #fff;
  white-space: nowrap;
}
.user-chip[hidden] { display: none !important; }
.user-chip button {
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 12px;
  color: #fff;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
}
.user-chip button:hover { background: rgba(255,255,255,0.2); }

.auth-mask {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(12, 16, 24, 0.55);
  display: grid; place-items: center;
  padding: 18px;
}
.auth-mask[hidden] { display: none !important; }
.auth-card {
  width: min(420px, 100%);
  background: var(--sheet);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 22px 18px;
  box-shadow: 0 18px 40px var(--shadow);
  font-family: "Microsoft YaHei", sans-serif;
}
.auth-card h2 { margin: 0 0 8px; font-family: inherit; }
.auth-lead { margin: 0 0 16px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.auth-card label {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
}
.auth-card input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--opt-bg);
  color: var(--ink);
  font-size: 15px;
  font-family: "Microsoft YaHei", sans-serif;
}
.auth-card input:focus { outline: 2px solid var(--navy); }
.auth-err { color: var(--bad); font-size: 13px; margin: 0 0 12px; }
.auth-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

.score-toolbar {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  margin: 0 0 14px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.score-toolbar label { display: flex; align-items: center; gap: 8px; }
.score-toolbar select,
.score-toolbar input {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--sheet);
  color: var(--ink);
  font-family: "Microsoft YaHei", sans-serif;
}
.table-wrap { overflow: auto; background: var(--sheet); border: 1px solid var(--line); border-radius: 12px; }
.score-table {
  width: 100%;
  border-collapse: collapse;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.score-table th, .score-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}
.score-table th { color: var(--muted); font-weight: 600; }
.score-table tbody tr:last-child td { border-bottom: 0; }
.brand { font-weight: 700; letter-spacing: 0.08em; }
.topbar .meta { font-size: 13px; opacity: 0.86; font-family: "Microsoft YaHei", sans-serif; }

.theme-switch { position: relative; flex: 0 0 auto; margin-left: auto; }
.theme-btn {
  display: flex; align-items: center; gap: 8px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: #fff;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
  white-space: nowrap;
}
.theme-btn:hover { background: rgba(255,255,255,0.2); }
.theme-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff 0, #fde68a 38%, #1e3a5f 70%);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.35);
}
html[data-theme="dark"] .theme-dot {
  background: radial-gradient(circle at 70% 30%, #fde68a 0, #0f172a 55%);
}
.theme-menu {
  display: flex;
  flex-direction: column;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 148px;
  background: var(--sheet);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 12px 28px var(--shadow);
  padding: 6px;
  z-index: 80;
}
.theme-menu[hidden] { display: none !important; }
.theme-menu button {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 7px;
  cursor: pointer;
}
.theme-menu button:hover { background: var(--opt-on); }
.theme-menu button.on {
  background: var(--opt-on);
  font-weight: 700;
}

.wrap { max-width: 980px; margin: 0 auto; padding: 28px 18px 120px; }

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: start;
  margin-bottom: 22px;
}
.seal {
  width: 92px; height: 92px;
  border: 3px solid var(--stamp);
  color: var(--stamp);
  border-radius: 8px;
  display: grid; place-items: center;
  text-align: center;
  transform: rotate(-8deg);
  font-weight: 700;
  line-height: 1.2;
  background: color-mix(in srgb, var(--stamp) 8%, transparent);
}
.seal b { font-size: 22px; display: block; }

h1 { margin: 0 0 8px; font-size: 32px; letter-spacing: 0.06em; }
.sub { color: var(--muted); margin: 0 0 10px; font-family: "Microsoft YaHei", sans-serif; }

.notice {
  background: var(--notice-bg);
  border: 1px dashed var(--notice-bd);
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px 16px;
  box-shadow: 0 10px 24px var(--shadow);
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-3px); }
.card .tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  background: var(--chip);
  color: var(--navy);
  border-radius: 999px;
  font-family: "Microsoft YaHei", sans-serif;
}
.card h2 { font-size: 20px; margin: 10px 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 13px; font-family: "Microsoft YaHei", sans-serif; }

.section-title {
  margin: 32px 0 14px;
  padding-left: 10px;
  border-left: 5px solid var(--navy);
  font-size: 22px;
}
.score-hint { font-size: 14px; color: var(--muted); font-weight: 400; }

.q {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 16px 14px;
  margin-bottom: 14px;
}
.q-hd {
  display: flex; gap: 8px; align-items: flex-start;
  font-family: "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
.qno {
  min-width: 42px;
  color: var(--navy);
  font-weight: 700;
}
.opts { margin-top: 10px; display: grid; gap: 8px; }
.opt {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  background: var(--opt-bg);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14.5px;
  line-height: 1.55;
}
.opt:hover { border-color: var(--opt-hover); }
.opt.on { border-color: var(--navy); background: var(--opt-on); }
.opt.ok { border-color: var(--ok); background: var(--opt-ok-bg); }
.opt.bad { border-color: var(--bad); background: var(--opt-bad-bg); }
.opt input { margin-top: 3px; }

.fill-row { margin-top: 10px; }
.fill-row input {
  width: 100%;
  max-width: 520px;
  padding: 9px 12px;
  border: none;
  border-bottom: 2px solid var(--fill-line);
  background: transparent;
  color: var(--ink);
  font-size: 16px;
  font-family: "Microsoft YaHei", sans-serif;
}
.fill-row input:focus { outline: none; border-bottom-color: var(--navy); }

.editor-box {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.CodeMirror { height: 240px; font-size: 14px; font-family: Consolas, "Courier New", monospace; }
.hint {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
}

.dock {
  position: fixed; left: 0; right: 0; bottom: 0;
  background: var(--dock);
  border-top: 1px solid var(--line);
  padding: 10px 20px;
  display: flex; justify-content: center; gap: 16px; align-items: center;
  z-index: 30;
}
.progress { font-family: "Microsoft YaHei", sans-serif; color: var(--muted); font-size: 14px; }
button.primary, button.ghost {
  font-family: "Microsoft YaHei", sans-serif;
  border-radius: 999px;
  padding: 9px 22px;
  cursor: pointer;
  font-size: 15px;
}
button.primary {
  background: var(--navy); color: #fff; border: 0;
}
html[data-theme="dark"] button.primary { color: #0b1220; }
button.primary:disabled { opacity: 0.55; cursor: not-allowed; }
button.ghost {
  background: var(--btn-ghost-bg); border: 1px solid var(--line); color: var(--ink);
}

.result {
  background: var(--sheet);
  border: 2px solid var(--navy);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 22px;
}
.result h2 { margin: 0 0 8px; }
.big-score {
  font-size: 48px;
  color: var(--stamp);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.why {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--why-bad-bg);
  border-left: 3px solid var(--bad);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.65;
}
.why.good {
  background: var(--why-good-bg);
  border-left-color: var(--ok);
}
.test-line { font-size: 13px; margin: 4px 0; font-family: Consolas, "Microsoft YaHei", monospace; }

.locked .opt { pointer-events: none; }
.locked .fill-row input { pointer-events: none; }

code {
  font-family: Consolas, "Courier New", monospace;
  background: var(--code-chip);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.95em;
}

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; }
  .topbar .meta { display: none; }
}