/* treelnk — 一棵长满有趣网站链接的树 */
:root {
  --bg: #0b0f14;
  --panel: #111820;
  --panel2: #161d27;
  --line: #232c38;
  --line2: #2f3a48;
  --fg: #e6edf3;
  --muted: #8b949e;
  --dim: #5c6672;
  --green: #3fb950;
  --green-dim: #1f6f34;
  --blue: #79c0ff;
  --amber: #d29922;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
main { max-width: 1000px; margin: 0 auto; padding: 0 20px 80px; }

/* ---------------------------------------------------------------- 顶栏 */

.top {
  max-width: 1000px; margin: 0 auto; padding: 22px 20px 10px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo { font-size: 20px; font-weight: 700; letter-spacing: -.02em; }
.logo span { color: var(--green); }
.nav { display: flex; gap: 6px; }
.nav a {
  padding: 6px 12px; border-radius: 8px; color: var(--muted); font-size: 14px;
  transition: background .15s, color .15s;
}
.nav a:hover { color: var(--fg); background: var(--panel); }
.nav a.on { color: var(--fg); background: var(--panel2); }

/* ---------------------------------------------------------------- 首屏 */

.hero { padding: 40px 0 28px; text-align: center; }
.hero.small { padding: 28px 0 18px; }
.hero h1 { font-size: 44px; margin: 10px 0 12px; letter-spacing: -.03em; }
.hero h1 .dot { color: var(--green); }
.hero.small h1 { font-size: 30px; margin: 0 0 8px; }
.pill {
  display: inline-block; padding: 4px 12px; border: 1px solid var(--green-dim);
  border-radius: 999px; color: var(--green); font-size: 13px;
}
.lead { color: var(--muted); margin: 0; }
.stats-line { margin-top: 18px; color: var(--dim); font-size: 14px; }
.stats-line b { color: var(--fg); }

/* ---------------------------------------------------------------- 分区与卡片 */

.cat { margin-top: 44px; }
.cat h2 {
  font-size: 17px; margin: 0 0 16px; display: flex; align-items: center; gap: 10px;
  color: var(--fg); font-weight: 600;
}
.cat h2 em { font-style: normal; color: var(--dim); font-size: 13px; font-weight: 400; }
.twig { width: 10px; height: 10px; border-radius: 50%; background: var(--green); flex: none; }
.spotlight { margin-top: 34px; }
.spotlight h2 { font-size: 15px; color: var(--muted); font-weight: 500; margin: 0 0 14px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card {
  display: block; padding: 16px 18px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; transition: border-color .15s, transform .15s, background .15s;
}
.card:hover { border-color: var(--line2); background: var(--panel2); transform: translateY(-2px); }
.card-h { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.card h3 { margin: 0; font-size: 16px; font-weight: 600; }
.card .tagline { margin: 6px 0 10px; color: var(--muted); font-size: 14px; }
.card .meta { color: var(--dim); font-size: 12px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }

.score {
  font-variant-numeric: tabular-nums; font-weight: 700; color: var(--green);
  background: rgba(63, 185, 80, .1); border: 1px solid var(--green-dim);
  padding: 2px 8px; border-radius: 8px; font-size: 13px; flex: none;
}
.score.muted { color: var(--dim); background: none; border-color: var(--line); font-weight: 400; }

.tag {
  color: var(--blue); background: rgba(121, 192, 255, .08); border: 1px solid #1f3b57;
  padding: 1px 7px; border-radius: 6px; font-size: 11px;
}

/* ---------------------------------------------------------------- 排行 */

.rank { display: flex; flex-direction: column; gap: 6px; }
.rank-row {
  display: grid; grid-template-columns: 34px 1fr auto; gap: 14px; align-items: center;
  padding: 12px 14px; border-radius: 10px; border: 1px solid transparent;
}
.rank-row:hover { background: var(--panel); border-color: var(--line); }
.idx { color: var(--dim); font-variant-numeric: tabular-nums; font-size: 14px; }
.r-main { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.r-title { font-weight: 600; }
.r-tag { color: var(--dim); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar { height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; max-width: 420px; }
.bar i { display: block; height: 100%; background: var(--green); border-radius: 2px; }
.r-score { color: var(--green); font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.r-score em { display: block; color: var(--dim); font-style: normal; font-size: 11px; font-weight: 400; }

/* ---------------------------------------------------------------- 详情 */

.detail { max-width: 720px; margin: 0 auto; padding-top: 24px; }
.back { color: var(--dim); font-size: 13px; }
.back:hover { color: var(--fg); }
.detail h1 { font-size: 34px; margin: 14px 0 8px; letter-spacing: -.02em; }
.detail .lead { font-size: 17px; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 26px; align-items: center; }
.chip {
  padding: 3px 10px; border: 1px solid var(--line); border-radius: 8px;
  color: var(--muted); font-size: 13px;
}
.chip.big { color: var(--green); border-color: var(--green-dim); font-weight: 600; }
.why { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.why h2 { font-size: 14px; color: var(--muted); margin: 0 0 8px; font-weight: 500; }
.why p { margin: 0; color: var(--fg); }
.visit {
  display: inline-block; margin: 20px 0 8px; padding: 10px 20px; border-radius: 10px;
  background: var(--green); color: #06140a; font-weight: 600;
}
.visit:hover { filter: brightness(1.1); }

.vote, .reasons { margin-top: 36px; border-top: 1px solid var(--line); padding-top: 22px; }
.vote h2, .reasons h2 { font-size: 16px; margin: 0 0 14px; font-weight: 600; }
.reasons h2 em { font-style: normal; color: var(--dim); font-weight: 400; font-size: 13px; }
.vote-row { display: flex; gap: 6px; flex-wrap: wrap; }
.vote-btn {
  width: 42px; height: 42px; border-radius: 10px; cursor: pointer; font-size: 15px;
  font-weight: 600; background: var(--panel); color: var(--muted);
  border: 1px solid var(--line); transition: all .12s;
}
.vote-btn:hover { color: var(--fg); border-color: var(--green); background: var(--panel2); }
.vote-btn.on { background: var(--green); color: #06140a; border-color: var(--green); }
.hint { color: var(--dim); font-size: 12px; margin: 10px 0 0; }
.flash {
  background: rgba(63, 185, 80, .1); border: 1px solid var(--green-dim); color: var(--green);
  padding: 9px 14px; border-radius: 10px; margin-bottom: 14px; font-size: 14px;
}
.flash.wide { max-width: 720px; margin: 0 auto 18px; }

.reason-form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
textarea, input, select {
  width: 100%; padding: 10px 12px; background: var(--panel); color: var(--fg);
  border: 1px solid var(--line); border-radius: 10px; font: inherit; font-size: 14px;
}
textarea { min-height: 84px; resize: vertical; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--green-dim); }
button {
  padding: 10px 18px; background: var(--green); color: #06140a; border: none;
  border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; align-self: flex-start;
}
button:hover { filter: brightness(1.08); }
button.ghost { background: none; color: var(--muted); border: 1px solid var(--line); font-weight: 400; }
button.ok { background: var(--green); padding: 6px 12px; font-size: 13px; }
button.bad { background: #3d1d1d; color: #ff9b9b; border: 1px solid #5c2b2b; padding: 6px 12px; font-size: 13px; }

.reason-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.reason-list li { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; }
.reason-list li.empty { color: var(--dim); text-align: center; border-style: dashed; }
.reason-list p { margin: 0 0 6px; }
.reason-list time { color: var(--dim); font-size: 12px; }

/* ---------------------------------------------------------------- 表单页 */

.form { max-width: 560px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.form.narrow { max-width: 320px; }
.form label { display: flex; flex-direction: column; gap: 6px; color: var(--muted); font-size: 13px; }
.inline { display: inline; }
.inline button { margin-left: 10px; }

/* ---------------------------------------------------------------- 后台 */

.tabs { display: flex; gap: 8px; margin: 20px 0 18px; flex-wrap: wrap; }
.tab {
  padding: 7px 14px; border: 1px solid var(--line); border-radius: 9px;
  color: var(--muted); font-size: 14px;
}
.tab.on { color: var(--fg); border-color: var(--line2); background: var(--panel); }
.tab em { font-style: normal; color: var(--green); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 20px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.kpi b { display: block; font-size: 18px; font-variant-numeric: tabular-nums; }
.kpi span { color: var(--dim); font-size: 12px; }
.kpi.sm b { font-size: 16px; }

.svcs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.svc {
  padding: 4px 10px; border-radius: 8px; font-size: 13px;
  border: 1px solid var(--line); color: var(--muted);
}
.svc.ok { border-color: var(--green-dim); color: var(--green); }
.svc.bad { border-color: #5c2b2b; color: #ff9b9b; }

.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: left; color: var(--dim); font-weight: 400; font-size: 12px; padding: 0 10px 8px; }
.tbl td { padding: 10px; border-top: 1px solid var(--line); vertical-align: top; }
.tbl .act { display: flex; gap: 8px; }
.tbl .act form { margin: 0; }
h3 { font-size: 15px; font-weight: 600; margin: 24px 0 10px; }

/* ---------------------------------------------------------------- 页脚 */

.foot {
  max-width: 1000px; margin: 40px auto 0; padding: 20px;
  border-top: 1px solid var(--line); color: var(--dim); font-size: 13px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.foot a:hover { color: var(--fg); }

@media (max-width: 600px) {
  .hero h1 { font-size: 34px; }
  .detail h1 { font-size: 26px; }
  .rank-row { grid-template-columns: 26px 1fr auto; gap: 10px; }
  .top { flex-direction: column; align-items: flex-start; }
}