:root {
  --bg: #f7f6f3;
  --card: #ffffff;
  --text: #22252a;
  --muted: #6b7079;
  --line: #e2e0da;
  --accent: #2a9d8f;
  --accent-ink: #ffffff;
  --warn: #b7791f;
  --bad: #c0392b;
  --bad-bg: #fdf0ee;
  --good: #2f855a;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --card: #1f2227;
    --text: #e6e6e3;
    --muted: #9aa0a8;
    --line: #33373e;
    --accent: #3cb4a5;
    --accent-ink: #0d1110;
    --bad: #e06c5f;
    --bad-bg: #2d1f1e;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
main { max-width: 820px; margin: 0 auto; padding: 16px 16px 80px; }
h1 { font-size: 1.6rem; margin: 16px 0 8px; }
h2 { font-size: 1.25rem; margin: 32px 0 12px; }
h3 { font-size: 1.05rem; margin: 0 0 8px; }
p { margin: 6px 0; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
.hidden { display: none; }

header.site {
  display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card);
}
.brand { font-weight: 700; font-size: 1.1rem; text-decoration: none; color: var(--text); }

.hero h1 { font-size: 1.9rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin: 16px 0;
}
.card.error { border-color: var(--bad); background: var(--bad-bg); }
.card.notice { border-left: 4px solid var(--accent); }
.card.privacy ul { margin: 0; padding-left: 20px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid2 > .card { margin: 0; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }

.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row.join { margin-top: 12px; }
.row.join input { flex: 1; min-width: 0; }
.spacer { flex: 1; }

.btn {
  display: inline-block; border: 1px solid var(--line); background: var(--card); color: var(--text);
  padding: 8px 14px; border-radius: 8px; font: inherit; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { color: var(--bad); border-color: var(--bad); }
.btn.small { padding: 4px 10px; font-size: .85rem; }
.btn.big { padding: 12px 28px; font-size: 1.05rem; margin: 24px 0; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }

input[type=text], input[type=number], textarea {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; width: 100%;
}
input[type=number] { width: 140px; }
input.invalid, select.invalid { border-color: var(--bad); }
/* 数字范围（硬性条件表的年龄、身高）：两个窄输入框 + 快捷按钮 */
input[type=number].range-num { width: 90px; }
/* 选项范围（学历、收入、运动）：两个下拉框 */
/* 范围题的拖动条：两个 range 输入框叠在一起，只有圆点能拖。
   --lo、--hi 是当前范围，--allow-lo、--allow-hi 是允许的范围（都是 0 到 1）。--r 是圆点半径，和 render.js 的 THUMB_R 一致 */
.range-item { max-width: 480px; }
.range-head { gap: 12px; }
.dual-value { font-weight: 600; color: var(--accent); }
.dual { --r: 13px; --lo: 0; --hi: 1; --allow-lo: 0; --allow-hi: 1; margin: 4px 0; }
.dual-rail { position: relative; height: 34px; cursor: pointer; touch-action: pan-y; }
.dual-rail::before, .dual-allowed, .dual-fill { content: ''; position: absolute; top: 15px; height: 4px; border-radius: 2px; pointer-events: none; }
.dual-rail::before { left: var(--r); right: var(--r); background: var(--line); }
.dual-allowed { left: calc(var(--r) + (100% - 2 * var(--r)) * var(--allow-lo)); width: calc((100% - 2 * var(--r)) * (var(--allow-hi) - var(--allow-lo))); background: var(--accent); opacity: .22; }
.dual-fill { left: calc(var(--r) + (100% - 2 * var(--r)) * var(--lo)); width: calc((100% - 2 * var(--r)) * (var(--hi) - var(--lo))); background: var(--accent); }
.dual.unset .dual-fill { background: var(--muted); opacity: .45; }
.dual input[type=range] {
  position: absolute; left: 0; top: 0; width: 100%; height: 34px; margin: 0; padding: 0;
  background: none; pointer-events: none; -webkit-appearance: none; appearance: none;
}
.dual input[type=range]::-webkit-slider-runnable-track { height: 34px; background: none; border: 0; }
.dual input[type=range]::-moz-range-track { background: none; border: 0; }
.dual input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; pointer-events: auto; width: 26px; height: 26px; margin-top: 4px;
  border-radius: 50%; background: var(--card); border: 3px solid var(--accent); cursor: grab;
}
.dual input[type=range]::-moz-range-thumb {
  pointer-events: auto; width: 20px; height: 20px; border-radius: 50%; background: var(--card); border: 3px solid var(--accent); cursor: grab;
}
.dual .dual-lo { z-index: 1; }
.dual .dual-hi { z-index: 2; }
.dual .dual-lo.front { z-index: 3; }
.dual.unset input[type=range]::-webkit-slider-thumb { border-color: var(--muted); }
.dual.unset input[type=range]::-moz-range-thumb { border-color: var(--muted); }
.dual.locked .dual-rail { cursor: default; }
.dual.locked .dual-fill { background: var(--muted); }
.dual.locked input[type=range]::-webkit-slider-thumb { border-color: var(--muted); background: var(--line); cursor: not-allowed; }
.dual.locked input[type=range]::-moz-range-thumb { border-color: var(--muted); background: var(--line); cursor: not-allowed; }
.dual input[type=range]:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--accent); outline-offset: 2px; }
/* 刻度文字：网格的列宽由 render.js 按刻度个数算好（两头各占半格加圆点半径），文字多了在格子里换行 */
.dual-ticks { display: grid; font-size: .8rem; line-height: 1.25; color: var(--muted); margin-top: 2px; }
.dual-ticks span { text-align: center; padding: 0 2px; cursor: pointer; overflow-wrap: anywhere; }
.dual-ticks span:first-child { text-align: left; padding-left: 0; }
.dual-ticks span:last-child { text-align: right; padding-right: 0; }
.dual.locked .dual-ticks span { cursor: default; }
/* 三档范围：自动填的档写明原因；拖不过去时说明被哪一档挡住 */
.range-tip { margin-top: 2px; }
.range-tip.warn { color: var(--warn); }
select.range-sel {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; max-width: 45%;
}
.range-sep { color: var(--muted); }
.row.quick { margin-top: 6px; }
.btn.chip { padding: 2px 10px; }
textarea { resize: vertical; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.toolbar {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px;
}
.toolbar.sticky { position: sticky; top: 8px; z-index: 10; }

.versions { display: grid; gap: 8px; }
.version { display: flex; gap: 10px; align-items: flex-start; padding: 10px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.version input { margin-top: 5px; }

.toc { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 12px 0; font-size: .9rem; }
.progress { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 2px 10px; border-radius: 99px; font-size: .85rem; }
.section { margin-top: 8px; }
.question {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; margin: 12px 0; min-width: 0;
}
.question legend { font-weight: 600; padding: 0 4px; }
.qid { color: var(--accent); font-variant-numeric: tabular-nums; }
.item { margin: 12px 0; }
.item-heading { margin: 18px 0 4px; padding-top: 10px; border-top: 1px dashed var(--line); font-size: .95rem; color: var(--accent); }
.item-heading.first { margin-top: 4px; padding-top: 0; border-top: 0; }
.item-label { font-weight: 500; margin-bottom: 4px; }
.hint { color: var(--muted); font-size: .85rem; margin-bottom: 4px; }
.opts { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; }
.opt { display: inline-flex; gap: 6px; align-items: center; padding: 4px 10px; border: 1px solid var(--line); border-radius: 99px; cursor: pointer; }
.opt:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.opt .other-input { width: 160px; padding: 2px 6px; }
.scale { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.scale-opt { display: inline-flex; gap: 4px; align-items: center; padding: 4px 10px; border: 1px solid var(--line); border-radius: 6px; cursor: pointer; }
.scale-opt:has(input:checked) { border-color: var(--accent); }
.unit { color: var(--muted); }
.rank-opts { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.rank-btn { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 99px; padding: 4px 12px; cursor: pointer; }
.rank-btn.picked { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }
.rank-btn:disabled { opacity: .4; cursor: not-allowed; }
.rank-no { display: inline-block; min-width: 1.4em; margin-right: 4px; color: var(--accent); }
details.note { margin-top: 8px; font-size: .9rem; }
details.note summary { color: var(--muted); cursor: pointer; }
details.note textarea { margin-top: 6px; }

.invite input { margin: 8px 0; }
.invite canvas.qr { display: block; width: min(100%, 220px); height: auto; image-rendering: pixelated; background: #fff; border-radius: 6px; margin: 8px 0 4px; }
.spinner {
  width: 28px; height: 28px; margin: 8px auto; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--accent); animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.summary { display: flex; gap: 20px; align-items: center; }
.score { font-size: 2.6rem; font-weight: 700; color: var(--accent); line-height: 1; }
.score small { font-size: 1rem; }
table.dims { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
table.dims th, table.dims td { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: center; }
table.dims td:first-child, table.dims th:first-child { text-align: left; }
details.group { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 16px; margin: 12px 0; }
details.group summary { font-weight: 600; cursor: pointer; }
details.group.mismatch { border-left: 4px solid var(--bad); }
details.group.negotiate { border-left: 4px solid var(--warn); }
details.group.match { border-left: 4px solid var(--good); }
details.group ul { padding-left: 18px; }
details.group li { margin: 10px 0; }
.talk { font-size: .9rem; margin-top: 2px; }
.tag { display: inline-block; margin-left: 6px; font-size: .75rem; color: var(--bad); border: 1px solid var(--bad); border-radius: 4px; padding: 0 4px; }
.pair { border-top: 1px dashed var(--line); padding-top: 10px; margin-top: 10px; }
.pair.flag { border-left: 4px solid var(--warn); padding-left: 12px; }
details.pair summary { cursor: pointer; }
details.pair[open] summary { margin-bottom: 8px; }
.pair-side ul { padding-left: 18px; margin: 4px 0; }
.pair-side li.hit { font-weight: 600; color: var(--warn); }

@media print {
  header.site, .toolbar, .btn { display: none; }
}

.card.pair-code { border-left: 4px solid var(--warn); }
.pair-code .code {
  font-size: 2rem; font-weight: 700; letter-spacing: .12em; margin: 6px 0;
  font-variant-numeric: tabular-nums; color: var(--text);
}
.privacy .link { margin-top: 8px; }
.pair-tag {
  display: inline-block; margin-left: 8px; font-size: .75rem; font-weight: 400;
  color: var(--warn); border: 1px solid var(--warn); border-radius: 4px; padding: 0 6px;
}
.vault-line .link, .self-store .link { margin-left: 4px; }

/* 等待页的解锁错误提示 */
.error-text { color: var(--bad); margin: 0.5em 0; }
.error-text:empty { display: none; }

/* 反馈 */
.feedback textarea,
.feedback input[type=text],
.feedback select { width: 100%; box-sizing: border-box; margin: 0.4em 0; }
.fb-row { display: flex; align-items: center; gap: 0.4em; flex-wrap: wrap; }
.fb-toggle { margin-top: 0.4em; text-align: right; }
.fb-toggle .card { text-align: left; margin-top: 0.4em; }
.feedback-entry summary { cursor: pointer; font-weight: 600; }
.stars { display: flex; gap: 0.2em; margin: 0.4em 0; }
.star { font-size: 1.6em; line-height: 1; background: none; border: none; cursor: pointer; color: var(--muted); padding: 0 0.1em; }
.star.on { color: var(--warn); }

/* 建房时选「当面 / 异地」 */
.mode-choice { display: grid; gap: 6px; margin: 8px 0 12px; }
.mode-choice label { display: flex; gap: 8px; align-items: baseline; }
/* 有进展时提醒 */
.reminder-toggle { display: inline-flex; gap: 6px; align-items: center; margin: 8px 0; }
/* 这台设备上保留的房间 */
.kept-list { padding-left: 1.2em; }
.kept-list li { margin: 6px 0; }