:root {
  --bg: #f4f6f9; --surface: #ffffff; --fg: #14202e; --fg-2: #3c4a5c; --fg-3: #6a7789; --line: #dde3ea;
  --accent: #0b5cad; --ok: #1d7a3c; --ok-bg: #e6f4ea; --bad: #b3261e; --bad-bg: #fbe9e7;
  --warn: #9a5b00; --warn-bg: #fff4e0; --uns: #b8c1cc;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f151c; --surface: #18212b; --fg: #e8edf2; --fg-2: #b9c3ce; --fg-3: #8a96a3; --line: #2a3542;
    --accent: #5aa2ec; --ok: #5cc97f; --ok-bg: #14301f; --bad: #ff8a80; --bad-bg: #3a1a18;
    --warn: #f0b45a; --warn-bg: #33270f; --uns: #4a5563;
  }
  .logo-r, .logo-l { filter: brightness(0) invert(1); }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font); font-size: 15px; line-height: 1.5; }
a { color: var(--accent); }
.top { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; padding: 18px 24px;
  background: var(--surface); border-bottom: 1px solid var(--line); }
.logo-l { height: 34px; justify-self: start; }
.logo-r { height: 34px; justify-self: end; }
.title { text-align: center; }
.title h1 { margin: 0; font-size: 20px; font-weight: 650; letter-spacing: 0.01em; }
.notice { margin: 0 0 16px; padding: 12px 16px; background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--accent); border-radius: 8px; font-size: 13.5px; color: var(--fg-2); }
.notice p { margin: 0; }
main { max-width: 980px; margin: 16px auto; padding: 0 16px; }
.drop { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 34px 16px; border: 2px dashed var(--line);
  border-radius: 12px; background: var(--surface); cursor: pointer; text-align: center; }
.drop:hover, .drop.over, .drop:focus { border-color: var(--accent); outline: none; }
.drop-t { font-size: 16px; font-weight: 600; }
.drop-s { font-size: 13px; color: var(--fg-3); }
.prog { margin-top: 14px; }
.prog-l { font-size: 13px; color: var(--fg-2); margin-bottom: 6px; }
.bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.bar > div { height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.result { margin-top: 16px; display: flex; flex-direction: column; gap: 14px; }
.verdict { padding: 16px 18px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); }
.verdict.ok { background: var(--ok-bg); border-color: var(--ok); }
.verdict.warn { background: var(--warn-bg); border-color: var(--warn); }
.verdict.bad { background: var(--bad-bg); border-color: var(--bad); }
.v-t { font-size: 18px; font-weight: 700; }
.verdict.ok .v-t { color: var(--ok); } .verdict.warn .v-t { color: var(--warn); } .verdict.bad .v-t { color: var(--bad); }
.v-s { margin-top: 4px; font-size: 14px; color: var(--fg-2); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; min-width: 0; }
.card h2 { margin: 0 0 10px; font-size: 15px; font-weight: 650; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 0; font-size: 14px; }
dt { color: var(--fg-3); }
dd { margin: 0; overflow-wrap: anywhere; }
.decl { display: inline-block; margin-left: 6px; padding: 0 6px; border-radius: 4px; background: var(--line); color: var(--fg-2); font-size: 11.5px; }
canvas { width: 100%; height: auto; background: var(--bg); border-radius: 8px; }
.route-k, .tl-k { font-size: 12px; color: var(--fg-3); margin-top: 6px; }
.tl-k { margin: -4px 0 8px; }
.tlbar { position: relative; height: 34px; border-radius: 6px; overflow: hidden; background: var(--uns); }
.tlbar span { position: absolute; top: 0; bottom: 0; background: var(--uns); box-shadow: inset -1px 0 0 rgba(0,0,0,.18); }
.tlbar span.ok { background: var(--ok); }
.tlbar span.bad { background: repeating-linear-gradient(45deg, var(--bad) 0 6px, #d9534f 6px 12px); }
.tlbar span.gap { box-shadow: inset 3px 0 0 var(--warn); }
.tlbar { margin-top: 26px; cursor: crosshair; }
.tlbar i.tick { position: absolute; top: 100%; height: 7px; width: 0; border-left: 1px solid var(--fg-3); opacity: .55; z-index: 1; pointer-events: none; }
.tlbar b.cursor { position: absolute; top: -4px; bottom: -4px; width: 2px; margin-left: -1px; background: var(--fg); z-index: 2; pointer-events: none; }
.card { position: relative; }
.tltip { position: absolute; transform: translate(-50%, -100%); margin-top: -4px; padding: 3px 8px; border-radius: 6px; background: var(--fg); color: var(--surface);
  font-size: 12px; white-space: nowrap; pointer-events: none; font-variant-numeric: tabular-nums; z-index: 3; }
.tlends { display: flex; justify-content: space-between; font-size: 12px; color: var(--fg-2); margin-top: 2px; font-variant-numeric: tabular-nums; }
.tlbar { overflow: visible; }
.tlscale { position: relative; height: 18px; margin-top: 8px; font-size: 11.5px; color: var(--fg-3); font-variant-numeric: tabular-nums; }
.tlscale span { position: absolute; transform: translateX(-50%); white-space: nowrap; }
.tlscale span:first-child { transform: none; } .tlscale span:last-child { transform: translateX(-100%); }
.edits { margin-top: 12px; font-size: 14px; }
.edits .e-h { font-weight: 650; color: var(--bad); margin-bottom: 4px; }
.edits ul { margin: 0; padding-left: 18px; } .edits li { margin: 2px 0; font-variant-numeric: tabular-nums; }
.edits .e-n { margin-top: 6px; font-size: 12px; color: var(--fg-3); }
.edits.clean .e-h { color: var(--ok); }
.legend { margin-top: 10px; font-size: 12px; color: var(--fg-3); display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.sw { width: 12px; height: 12px; border-radius: 3px; display: inline-block; margin-left: 8px; }
.sw.ok { background: var(--ok); } .sw.bad { background: var(--bad); } .sw.uns { background: var(--uns); }
footer { max-width: 980px; margin: 24px auto 32px; padding: 0 16px; font-size: 12.5px; color: var(--fg-3); }
footer .meta { margin-top: 6px; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 11.5px; overflow-wrap: anywhere; }
@media (max-width: 640px) {
  .top { grid-template-columns: 1fr 1fr; grid-template-areas: "l r" "t t"; padding: 12px 16px; gap: 10px; }
  .logo-l { grid-area: l; height: 26px; } .logo-r { grid-area: r; height: 26px; }
  .title { grid-area: t; } .title h1 { font-size: 16px; }
  dl { grid-template-columns: 1fr; gap: 2px; } dd { margin-bottom: 6px; }
}