/* HEODIY Speed Lab — 静态博客样式 */
:root {
  --bg: #0a0e13;
  --bg-soft: #101823;
  --card: #141d29;
  --card-hi: #18232f;
  --line: #22303e;
  --fg: #e7eef5;
  --muted: #8ea3b8;
  --accent: #38e1a8;
  --accent-dim: rgba(56, 225, 168, 0.14);
  --accent2: #4a9eff;
  --warn: #ffb347;
  --radius: 16px;
  --maxw: 1040px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

html[data-theme="light"] {
  --bg: #f6f8fa;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --card-hi: #f1f5f9;
  --line: #dde5ee;
  --fg: #101a24;
  --muted: #5b6b7c;
  --accent: #0f9d76;
  --accent-dim: rgba(15, 157, 118, 0.10);
  --accent2: #1f6feb;
  --warn: #b26a00;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 82% -8%, rgba(56, 225, 168, 0.13), transparent 60%),
    radial-gradient(700px 420px at 8% 0%, rgba(74, 158, 255, 0.10), transparent 60%),
    var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.header-in { display: flex; align-items: center; gap: 18px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand .dot {
  width: 26px; height: 26px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: grid; place-items: center; color: #06130f; font-size: 13px; font-weight: 800;
}
.brand small { color: var(--muted); font-weight: 500; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--muted); padding: 7px 12px; border-radius: 10px; font-size: 14.5px;
}
.nav a:hover { color: var(--fg); background: var(--card); text-decoration: none; }
.nav a.active { color: var(--fg); background: var(--card-hi); }
.theme-toggle {
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
  width: 34px; height: 34px; border-radius: 10px; cursor: pointer; font-size: 15px; line-height: 1;
  margin-left: 6px;
}
.theme-toggle:hover { color: var(--fg); }

/* ---------- hero ---------- */
.hero { padding: 62px 0 34px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(30px, 5.2vw, 50px); line-height: 1.16; margin: 0 0 16px;
  letter-spacing: -.02em;
  background: linear-gradient(120deg, var(--fg) 30%, var(--accent) 90%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p.lead { color: var(--muted); font-size: 17px; max-width: 660px; margin: 0 0 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 22px; border-radius: 12px; font-size: 15.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s, filter .12s;
  font-family: inherit;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent2))); color: #04140f; }
.btn-primary:hover { filter: brightness(1.07); }
.btn-ghost { background: var(--card); border-color: var(--line); color: var(--fg); }
.btn-ghost:hover { background: var(--card-hi); }

/* ---------- stat strip ---------- */
.stat-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 8px; }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px;
}
.stat .k { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.stat .v { font-family: var(--mono); font-size: 19px; font-weight: 600; margin-top: 4px; }
.stat .v em { font-style: normal; font-size: 12.5px; color: var(--muted); font-weight: 400; }

/* ---------- sections / cards ---------- */
.section { padding: 46px 0; }
.section-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 22px; }
.section-head h2 { font-size: 22px; margin: 0; letter-spacing: -.01em; }
.section-head span { color: var(--muted); font-size: 14px; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; transition: border-color .15s, transform .15s, background .15s;
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); background: var(--card-hi); }
.card h3 { margin: 0 0 8px; font-size: 17.5px; line-height: 1.4; }
.card h3 a { color: var(--fg); }
.card h3 a:hover { color: var(--accent); text-decoration: none; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .meta { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 12.5px; font-family: var(--mono); }
.tag {
  display: inline-block; font-size: 12px; padding: 3px 9px; border-radius: 999px;
  background: var(--accent-dim); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}

/* ---------- speed test ---------- */
.test-shell {
  background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  padding: 26px; margin-top: 8px;
}
.test-top { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-bottom: 22px; }
.test-top .btn { padding: 11px 20px; }
#status { color: var(--muted); font-size: 14px; font-family: var(--mono); }
#status.busy { color: var(--accent); }

.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.metric {
  position: relative; overflow: hidden;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 18px 16px;
}
.metric .label { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.metric .value { font-family: var(--mono); font-size: 30px; font-weight: 700; line-height: 1.25; letter-spacing: -.02em; }
.metric .unit { font-size: 13px; color: var(--muted); font-weight: 500; }
.metric .sub { font-size: 12.5px; color: var(--muted); font-family: var(--mono); margin-top: 2px; min-height: 18px; }
.metric[data-phase="ping"] .value { color: var(--accent2); }
.metric[data-phase="down"] .value { color: var(--accent); }
.metric[data-phase="up"] .value { color: var(--warn); }
.metric.active { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent) inset; }

.bar { height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; margin-top: 12px; }
.bar > i { display: block; height: 100%; width: 0%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .18s ease-out; }
.metric[data-phase="ping"] .bar > i { background: linear-gradient(90deg, var(--accent2), #7fb6ff); }
.metric[data-phase="up"] .bar > i { background: linear-gradient(90deg, var(--warn), #ffd79a); }

.spark-box { margin-top: 20px; }
.spark-box .k { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
#spark { width: 100%; height: 74px; display: block; }
#spark polyline { fill: none; stroke: var(--accent2); stroke-width: 2; stroke-linejoin: round; }
#spark line { stroke: var(--line); stroke-width: 1; }

.result { margin-top: 20px; display: none; }
.result.show { display: block; }
.result-bar { display: flex; gap: 10px; flex-wrap: wrap; }
pre.result-text {
  margin: 14px 0 0; background: var(--bg-soft); border: 1px dashed var(--line);
  border-radius: 12px; padding: 14px 16px; font-family: var(--mono); font-size: 13px;
  color: var(--muted); white-space: pre-wrap; word-break: break-word;
}

.log {
  margin-top: 18px; font-family: var(--mono); font-size: 12.5px; color: var(--muted);
  max-height: 120px; overflow: auto; line-height: 1.6;
}
.log div::before { content: "› "; color: var(--accent); }

.file-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 14px; }
.file-table th, .file-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.file-table th { color: var(--muted); font-weight: 500; font-size: 12.5px; text-transform: uppercase; letter-spacing: .08em; }
.file-table td:last-child { text-align: right; font-family: var(--mono); }

/* ---------- article ---------- */
.article { padding: 44px 0 60px; max-width: 760px; }
.article h1 { font-size: clamp(26px, 4vw, 38px); line-height: 1.25; margin: 10px 0 14px; letter-spacing: -.02em; }
.article .post-meta { color: var(--muted); font-family: var(--mono); font-size: 13px; margin-bottom: 26px; }
.article h2 { font-size: 20px; margin: 34px 0 10px; }
.article h3 { font-size: 17px; margin: 26px 0 8px; }
.article p, .article li { color: color-mix(in srgb, var(--fg) 82%, var(--muted)); }
.article ul, .article ol { padding-left: 22px; }
.article code {
  font-family: var(--mono); font-size: 13.5px; background: var(--bg-soft);
  border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px;
}
.article pre {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; overflow: auto; font-size: 13px; line-height: 1.6;
}
.article pre code { background: none; border: 0; padding: 0; }
.article blockquote {
  margin: 22px 0; padding: 2px 0 2px 16px; border-left: 3px solid var(--accent);
  color: var(--muted);
}
.article table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 18px 0; }
.article th, .article td { border-bottom: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.article th { color: var(--muted); font-weight: 600; }
.back { display: inline-block; margin-bottom: 18px; font-size: 14px; color: var(--muted); }
.back:hover { color: var(--accent); text-decoration: none; }

/* ---------- callout ---------- */
.callout {
  border: 1px solid color-mix(in srgb, var(--warn) 32%, var(--line));
  background: color-mix(in srgb, var(--warn) 8%, var(--card));
  border-radius: var(--radius); padding: 16px 18px; margin: 22px 0;
  font-size: 14.5px; color: var(--fg);
}
.callout strong { color: var(--warn); }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); margin-top: 40px; padding: 28px 0 40px;
  color: var(--muted); font-size: 13.5px;
}
.footer-in { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); text-decoration: none; }

@media (max-width: 620px) {
  .header-in { height: 56px; gap: 10px; }
  .brand small { display: none; }
  .nav a { padding: 6px 9px; font-size: 13.5px; }
  .hero { padding: 40px 0 22px; }
  .test-shell { padding: 18px; }
  .metric .value { font-size: 26px; }
}