:root {
  --bg: #f6f6f4; --card: #ffffff; --text: #18181b; --muted: #5b5b66; --line: #e4e4e7; --accent: #0f766e;
  --ok: #166534; --ok-bg: #dcfce7; --bad: #991b1b; --bad-bg: #fee2e2; --warn: #854d0e; --warn-bg: #fef3c7; --drop: #fafaf9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050505; --card: #0e0e10; --text: #f5f5f4; --muted: #a1a1aa; --line: #2a2a30; --accent: #2dd4bf;
    --ok: #86efac; --ok-bg: #052e16; --bad: #fca5a5; --bad-bg: #3f0d0d; --warn: #fde68a; --warn-bg: #3a2a06; --drop: #141417;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
a { color: var(--accent); }
.top, main, .foot { max-width: 40rem; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 20px; padding-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 700; font-size: 1.05rem; }
.mark { width: 32px; height: 32px; flex: none; display: block; }
.tag { color: var(--muted); font-size: .85rem; }
main { padding-bottom: 12px; }
h1 { font-size: 1.55rem; line-height: 1.25; margin: .35rem 0 .5rem; overflow-wrap: anywhere; }
h2 { font-size: 1.05rem; margin: 0 0 .4rem; }
.lead { margin: 0 0 1.25rem; }
.pill { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .02em; padding: .2rem .65rem; border-radius: 999px; }
.pill.ok { background: var(--ok-bg); color: var(--ok); }
.pill.bad { background: var(--bad-bg); color: var(--bad); }
.pill.warn { background: var(--warn-bg); color: var(--warn); }
.facts { margin: 0 0 .5rem; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 2px 16px; }
.facts > div { display: grid; grid-template-columns: minmax(8.5rem, 38%) 1fr; gap: 12px; padding: 11px 0; border-top: 1px solid var(--line); }
.facts > div:first-child { border-top: 0; }
dt { color: var(--muted); font-size: .9rem; }
dd { margin: 0; overflow-wrap: anywhere; }
.sub { display: block; color: var(--muted); font-size: .9rem; }
code { font: .8rem/1.5 ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace; word-break: break-all; }
.fine { color: var(--muted); font-size: .85rem; margin: .4rem 0 1.5rem; }
.check { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 0 0 1.25rem; }
.check > p { margin: 0 0 .75rem; color: var(--muted); font-size: .95rem; }
.drop { position: relative; display: block; border: 2px dashed var(--line); border-radius: 10px; padding: 20px 14px; text-align: center; cursor: pointer; background: var(--drop); }
.drop input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.drop:hover, .check.over .drop { border-color: var(--accent); }
.drop:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.drop-main { display: block; font-weight: 600; color: var(--accent); }
.drop-sub { display: block; color: var(--muted); font-size: .85rem; margin-top: 4px; }
.result { margin: .85rem 0 0; padding: 10px 12px; border-radius: 8px; font-weight: 600; }
.result.ok { background: var(--ok-bg); color: var(--ok); }
.result.bad { background: var(--bad-bg); color: var(--bad); }
.result.busy { background: var(--drop); color: var(--muted); }
.result-sub { display: block; font-weight: 400; font-size: .78rem; margin-top: 6px; word-break: break-all; }
.note { color: var(--muted); font-size: .9rem; }
.foot { color: var(--muted); font-size: .8rem; padding-top: 14px; padding-bottom: 28px; }
.foot p { margin: 0; border-top: 1px solid var(--line); padding-top: 12px; }
@media (max-width: 30rem) {
  .facts > div { grid-template-columns: 1fr; gap: 2px; }
  h1 { font-size: 1.35rem; }
}