:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --text: #1c2321;
  --muted: #5b6662;
  --line: #d9dfdc;
  --accent: #0b6e5f;
  --accent-text: #ffffff;
  --accent-soft: #e2f1ed;
  --warn-bg: #fff6e0;
  --warn-line: #e7c56c;
  --warn-text: #5a4100;
  --error: #b3261e;
  --mock-bg: #b3261e;
  --mock-text: #ffffff;
  --code-bg: #eef1ef;
  --focus: #1a73e8;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111615;
    --surface: #1a201f;
    --text: #e4e9e7;
    --muted: #9aa6a2;
    --line: #2e3735;
    --accent: #4cc2a9;
    --accent-text: #08201b;
    --accent-soft: #173029;
    --warn-bg: #2b2412;
    --warn-line: #6b5520;
    --warn-text: #f1dca5;
    --error: #ff8a80;
    --mock-bg: #8c1d18;
    --mock-text: #ffffff;
    --code-bg: #232b29;
    --focus: #8ab4f8;
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 var(--sans);
}

.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

code, .mono, pre { font-family: var(--mono); }
code { font-size: 0.92em; background: var(--code-bg); padding: 0.05em 0.3em; border-radius: 4px; }
pre { background: var(--code-bg); padding: 10px 12px; border-radius: 8px; overflow-x: auto; font-size: 0.85rem; }
pre code { background: none; padding: 0; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.mock-banner {
  background: var(--mock-bg); color: var(--mock-text);
  padding: 12px 16px; text-align: center; font-size: 1rem;
}
.mock-banner strong:first-child { font-size: 1.25rem; letter-spacing: 0.08em; margin-right: 0.5em; }
.mock-banner code { background: rgba(255, 255, 255, 0.2); color: inherit; }

.top { padding: 28px 0 8px; }
.top h1 { margin: 0; font-size: 1.75rem; letter-spacing: -0.01em; }
.top .dot { color: var(--accent); }
.lede { margin: 4px 0 0; color: var(--muted); max-width: 60ch; }

h2 { font-size: 1.15rem; margin: 28px 0 10px; }
h3 { font-size: 1.05rem; margin: 0 0 4px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin: 16px 0;
}

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: -4px 0 14px; }
.tabs [role="tab"] {
  font: inherit; font-weight: 600; color: var(--muted);
  background: none; border: 0; border-bottom: 3px solid transparent;
  padding: 8px 10px; margin-bottom: -1px; cursor: pointer;
}
.tabs [role="tab"][aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }

.field-row { display: flex; gap: 12px; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field.grow { flex: 1; min-width: 0; }
label { font-weight: 600; font-size: 0.95rem; }
input[type="text"], select {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px; min-height: 44px; width: 100%;
}
input.mono { font-family: var(--mono); font-size: 1.15rem; letter-spacing: 0.02em; }
#mc-prefix { max-width: 14ch; text-transform: uppercase; }
select { width: auto; min-width: 4.5em; }
input[aria-invalid="true"] { border-color: var(--error); }

.help { color: var(--muted); font-size: 0.9rem; margin: 8px 0 0; }
.error { color: var(--error); margin: 6px 0 0; min-height: 1.5em; font-size: 0.95rem; }
.error:empty { min-height: 0; margin: 0; }
.work { margin: 10px 0 0; font-size: 0.95rem; }

.paths { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.paths .card { margin: 0; display: flex; flex-direction: column; }
.path.faster { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.sub { margin: 0 0 10px; color: var(--muted); font-size: 0.92rem; }

.badge {
  display: inline-block; vertical-align: 2px;
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 2px 7px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted);
}
.badge.fast { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }

dl.est, dl.stats { margin: 0 0 14px; display: grid; gap: 6px; }
dl.est > div, dl.stats > div { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
dl dt { color: var(--muted); font-size: 0.92rem; }
dl dd { margin: 0; font-variant-numeric: tabular-nums; text-align: right; font-weight: 600; }
#remote-breakdown { font-weight: 400; font-size: 0.88rem; }
#local-mean, #remote-total { font-size: 1.2rem; }

.caveat {
  background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn-text);
  border-radius: 8px; padding: 10px 12px; margin: 0 0 14px; font-size: 0.9rem;
}
.caveat p { margin: 0 0 6px; }
.caveat a { color: inherit; }
.caveat summary { cursor: pointer; font-weight: 600; }
.caveat ul { margin: 6px 0 4px; padding-left: 1.2em; }
.caveat li { margin: 4px 0; }
.ack { display: flex; gap: 8px; align-items: flex-start; font-weight: 600; margin-top: 8px; cursor: pointer; }
.ack input { width: 18px; height: 18px; margin: 2px 0 0; flex: none; }

.btn {
  font: inherit; font-weight: 600; cursor: pointer;
  min-height: 44px; padding: 10px 16px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.path .btn { margin-top: auto; width: 100%; }
.btn.small { min-height: 34px; padding: 4px 10px; font-size: 0.85rem; }

.advice { margin: 12px 0 0; padding: 10px 12px; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 8px 8px 0; }

.phases { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0 0 10px; font-size: 0.85rem; }
.phases li { padding: 3px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.phases li.done { color: var(--text); }
.phases li.done::before { content: "✓ "; }
.phases li.current { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.phase-text { margin: 0 0 8px; font-weight: 600; }

.meter progress { width: 100%; height: 12px; accent-color: var(--accent); }
dl.stats { grid-template-columns: repeat(3, 1fr); gap: 10px 20px; margin-top: 10px; }
dl.stats > div { flex-direction: column; align-items: flex-start; gap: 0; }
dl.stats dd { text-align: left; font-size: 1.1rem; }
.note { color: var(--muted); font-size: 0.9rem; margin: 0 0 10px; }
.note:empty { display: none; }

.warn { background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn-text); border-radius: 8px; padding: 10px 12px; }
.meta { color: var(--muted); font-size: 0.9rem; }
.hit { border-top: 1px solid var(--line); padding: 12px 0; }
.hit h3 { font-family: var(--mono); font-size: 1.25rem; }
.kv { margin: 10px 0 0; }
.kv .k { font-size: 0.85rem; color: var(--muted); font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.kv .v { display: block; margin-top: 4px; padding: 8px 10px; background: var(--code-bg); border-radius: 6px; font-family: var(--mono); font-size: 0.88rem; word-break: break-all; user-select: all; }
.kv.secret .v { border-left: 3px solid var(--warn-line); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.howto { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 4px; }
.howto h3 { margin-top: 12px; }
.howto p { font-size: 0.95rem; }

.notice { padding: 12px; border: 1px solid var(--warn-line); background: var(--warn-bg); border-radius: 8px; }

.foot { color: var(--muted); font-size: 0.88rem; padding-top: 12px; padding-bottom: 32px; border-top: 1px solid var(--line); margin-top: 32px; }
.foot p { margin: 8px 0; }

@media (max-width: 680px) {
  .paths { grid-template-columns: 1fr; }
  dl.stats { grid-template-columns: 1fr 1fr; }
  .top { padding-top: 18px; }
  .top h1 { font-size: 1.5rem; }
  .tabs [role="tab"] { padding: 8px 6px; font-size: 0.95rem; }
}

@media (max-width: 420px) {
  .tab-extra { display: none; }
  .card { padding: 14px; }
  dl.est > div { flex-wrap: wrap; }
  dl.est dd { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}
#results:focus { outline: none; }