:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #586271;
  --line: #e3e7ec;
  --card: #f5f7f9;
  --accent: #1f9d4a;
  --accent-fg: #ffffff;
  --err: #b42318;
  --focus: #0b63ce;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --fg: #f2f5fa;
    --muted: #9aa6b8;
    --line: #243044;
    --card: #131c2e;
    --accent: #3ddc84;
    --accent-fg: #06210f;
    --err: #ff8a80;
    --focus: #7ab4ff;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  min-height: 100dvh;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.sr {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
[hidden] { display: none !important; }

.wrap { max-width: 880px; margin: 0 auto; padding: 16px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 8px 12px; flex-wrap: wrap; }
.brand { font-size: 1rem; font-weight: 700; margin: 0; letter-spacing: .01em; flex: 1 1 auto; }
select {
  font: inherit; color: var(--fg); background: var(--card);
  border: 1px solid var(--line); border-radius: 10px;
  min-height: 44px; padding: 8px 12px;
}
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.langs ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 6px; justify-content: flex-end; }
.langs a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 10px; border-radius: 10px;
  color: var(--muted); text-decoration: none; border: 1px solid transparent; font-size: .92rem;
}
.langs a:hover { border-color: var(--line); color: var(--fg); }
.langs a[aria-current="page"] { color: var(--fg); font-weight: 700; border-color: var(--line); background: var(--card); }
.seo { margin-top: 36px; max-width: 70ch; margin-left: auto; margin-right: auto; color: var(--fg); }
.seo h2 { font-size: 1.15rem; margin: 1.6em 0 .4em; }
.seo h3 { font-size: 1rem; margin: 1.1em 0 .2em; }
.seo p { margin: .4em 0; color: var(--muted); }
.seo .intro { color: var(--fg); }
.flinks ul { list-style: none; margin: 0 0 4px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; justify-content: center; }
.flinks a { display: inline-flex; align-items: center; min-height: 44px; color: var(--fg); text-underline-offset: 3px; }
.hero { text-align: center; padding: 28px 0 8px; }
.status { margin: 0 0 4px; font-size: clamp(1.15rem, 4.6vw, 1.9rem); font-weight: 700; min-height: 1.4em; }
.speed { display: flex; align-items: flex-start; justify-content: center; gap: 8px; }
.num {
  font-size: clamp(5.5rem, 28vw, 12rem);
  line-height: 1; font-weight: 600; letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  min-width: 2ch;
}
.unit { font-size: clamp(1.3rem, 5vw, 2.6rem); font-weight: 700; margin-top: .55em; }
.bar { height: 6px; max-width: 420px; margin: 8px auto 20px; background: var(--line); border-radius: 99px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 100%; transform: scaleX(0); transform-origin: left; background: var(--accent); transition: transform .25s linear; }
.go {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-width: 64px; min-height: 64px; padding: 0 22px;
  border-radius: 99px; border: 3px solid var(--accent);
  background: transparent; color: var(--fg); font-weight: 700; font-size: 1.05rem;
}
.go svg { width: 28px; height: 28px; fill: currentColor; }
.go:hover { background: var(--accent); color: var(--accent-fg); }
.go.running { border-color: var(--muted); }
.error { color: var(--err); font-weight: 600; margin: 14px 0 0; }

.details { margin-top: 16px; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; }
.k { color: var(--muted); font-size: .85rem; }
.v { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.v small { font-size: .85rem; font-weight: 600; color: var(--muted); margin-left: 3px; }
.meta { margin: 14px 0 0; display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; font-size: .92rem; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; overflow-wrap: anywhere; }
.actions { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  min-height: 44px; padding: 0 18px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--fg); font-weight: 600;
}
.btn:hover { border-color: var(--accent); }

.more {
  display: block; margin: 20px auto 0; min-height: 44px; padding: 0 12px;
  background: none; border: 0; color: var(--fg); text-decoration: underline; text-underline-offset: 3px;
}
.extra { margin-top: 10px; display: grid; gap: 12px; }
.box { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; background: var(--card); }
.box summary { cursor: pointer; font-weight: 700; min-height: 28px; }
.field { margin-top: 10px; display: grid; gap: 8px; }
.hint { color: var(--muted); font-size: .88rem; margin: 6px 0 0; }
.hrow { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.h2 { font-size: 1rem; margin: 0; }
.link { background: none; border: 0; color: var(--fg); text-decoration: underline; text-underline-offset: 3px; min-height: 44px; padding: 0 6px; }
.hist { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 6px; }
.hist li { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-variant-numeric: tabular-nums; border-top: 1px solid var(--line); padding-top: 6px; }
.hist li:first-child { border-top: 0; padding-top: 0; }
.hist .when { color: var(--muted); }

.foot { margin-top: 28px; text-align: center; }
.foot .hint { max-width: 60ch; margin-left: auto; margin-right: auto; }
.ver { color: var(--muted); font-size: .8rem; }

.banner {
  position: sticky; top: 0; z-index: 5; display: flex; gap: 12px; align-items: center; justify-content: center;
  padding: 10px 16px; background: var(--accent); color: var(--accent-fg); font-weight: 600;
}
.banner .link { color: var(--accent-fg); }

@media (max-width: 639px) {
  .langs { flex-basis: 100%; }
  .langs ul { justify-content: flex-start; }
}
@media (min-width: 640px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
  .wrap { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .bar i { transition: none; }
}