:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #16181d;
  --muted: #6b7280;
  --line: #e5e7eb;
  --line-soft: #f0f2f5;
  --accent: #185fa5;
  --free: #0f7b3d;
  --free-bg: #e6f6ec;
  --taken: #b02020;
  --taken-bg: #fdecec;
  --unk: #6b7280;
  --unk-bg: #eef0f3;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #171a21;
    --text: #e8eaed;
    --muted: #9aa3b2;
    --line: #262b36;
    --line-soft: #1e222b;
    --accent: #6ba7e8;
    --free: #3ecf8e;
    --free-bg: #10301f;
    --taken: #f87171;
    --taken-bg: #331518;
    --unk: #9aa3b2;
    --unk-bg: #1e222b;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

/* ---- top bar ---- */
.top {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.bar { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--text); }
.mark {
  width: 11px; height: 11px; border-radius: 3px;
  background: var(--accent); display: inline-block;
}
.brand .name {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 600; font-size: 15px; letter-spacing: -0.2px;
}
.top nav { display: flex; gap: 20px; }
.top nav a {
  color: var(--muted); text-decoration: none; font-size: 13.5px;
}
.top nav a:hover { color: var(--text); }

/* ---- hero ---- */
.hero { padding: 56px 0 20px; }
.eyebrow {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; color: var(--accent); margin: 0 0 10px; letter-spacing: 0.4px;
}
.hero h1 { font-size: 32px; margin: 0 0 12px; letter-spacing: -0.6px; font-weight: 600; }
.lede { color: var(--muted); margin: 0 0 26px; max-width: 640px; }
.lede b { color: var(--text); font-weight: 500; }

/* ---- search ---- */
.search { display: flex; gap: 10px; }
#name {
  flex: 1; min-width: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 15px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}
#name:focus { border-color: var(--accent); }
#go {
  padding: 13px 26px;
  border: none; border-radius: var(--radius);
  background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 500; cursor: pointer;
  transition: opacity .15s;
}
#go:hover { opacity: .88; }
#go:disabled { opacity: .5; cursor: default; }

.quick { display: flex; align-items: center; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.quick span { font-size: 12.5px; color: var(--muted); }
.chip {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px; padding: 4px 11px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--panel); color: var(--muted); cursor: pointer;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

/* ---- status / summary ---- */
.status {
  margin-top: 22px; font-size: 13.5px; color: var(--muted);
  display: flex; align-items: center; gap: 9px;
}
.spin {
  width: 13px; height: 13px; border-radius: 50%;
  border: 2px solid var(--line); border-top-color: var(--accent);
  animation: sp .7s linear infinite;
}
@keyframes sp { to { transform: rotate(360deg); } }

.summary { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.sum-item {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 999px; padding: 7px 15px; font-size: 13px;
  display: flex; align-items: center; gap: 8px;
}
.sum-item b { font-size: 15px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.d-free { background: var(--free); }
.d-taken { background: var(--taken); }
.d-unk { background: var(--unk); }

/* ---- results ---- */
.results { margin-top: 26px; }
.group { margin-bottom: 30px; }
.group h3 {
  font-size: 13px; font-weight: 600; color: var(--muted);
  margin: 0 0 10px; text-transform: uppercase; letter-spacing: .6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.rows { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.row {
  display: grid; grid-template-columns: 1fr auto; gap: 14px;
  padding: 12px 16px; border-bottom: 1px solid var(--line-soft);
  align-items: center;
}
.row:last-child { border-bottom: none; }
.row .label {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13.5px; font-weight: 600; word-break: break-all;
}
.row .ev { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.row .right { display: flex; align-items: center; gap: 10px; }
.badge {
  font-size: 11.5px; font-weight: 600; padding: 3px 10px;
  border-radius: 6px; white-space: nowrap;
}
.b-free { background: var(--free-bg); color: var(--free); }
.b-taken { background: var(--taken-bg); color: var(--taken); }
.b-unknown { background: var(--unk-bg); color: var(--unk); }
.tier {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11.5px; color: var(--muted); white-space: nowrap;
}
.row a.go {
  color: var(--muted); text-decoration: none; font-size: 15px;
  line-height: 1; padding: 3px;
}
.row a.go:hover { color: var(--accent); }

/* ---- hub ---- */
.hub { padding: 30px 0 10px; border-top: 1px solid var(--line); margin-top: 20px; }
.hub h2 { font-size: 19px; margin: 0 0 4px; letter-spacing: -.3px; }
.hub-sub { color: var(--muted); font-size: 13.5px; margin: 0 0 16px; }
.hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.hub-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 13px 15px; text-decoration: none; color: var(--text);
  display: flex; flex-direction: column; gap: 3px; transition: border-color .15s;
}
.hub-card:hover { border-color: var(--accent); }
.hub-card .k {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13.5px; font-weight: 600;
}
.hub-card .v { font-size: 12.5px; color: var(--muted); }

/* ---- footer ---- */
.foot { padding: 34px 20px 60px; color: var(--muted); font-size: 12.5px; }
.foot p { margin: 0 0 8px; max-width: 700px; }
.foot .muted { color: var(--muted); opacity: .75; }
.foot code {
  background: var(--unk-bg); padding: 1px 5px; border-radius: 4px;
  font-size: 11.5px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.foot a { color: var(--accent); }

@media (max-width: 560px) {
  .hero { padding: 36px 0 12px; }
  .hero h1 { font-size: 25px; }
  .search { flex-direction: column; }
  #go { width: 100%; }
  .row { grid-template-columns: 1fr; gap: 8px; }
  .row .right { justify-content: flex-start; }
  .top nav { gap: 14px; }
  .top nav a { font-size: 12.5px; }
}