:root {
  --paper: #f7fbfd;
  --ink: #183b50;
  --ocean: #126b86;
  --pale: #deeff5;
  --amber: #9a550b;
  --muted: #526b79;
  --white: #ffffff;
  --line: #c9dfe8;
  --radius: 18px;
  --shadow: 0 1px 2px rgba(24, 59, 80, 0.06), 0 6px 18px rgba(24, 59, 80, 0.06);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Meiryo", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: clamp(16px, 0.95rem + 0.25vw, 18px);
}

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

body { margin: 0; }

a { color: var(--ocean); }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--white); padding: 0.5rem 1rem; border-radius: 8px;
}
.skip:focus { left: 1rem; top: 1rem; z-index: 10; }

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

.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  max-width: 1120px; margin: 0 auto; padding: 1rem clamp(1rem, 4vw, 2rem);
}
.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand-name { margin: 0; font-weight: 700; font-size: 1.25rem; letter-spacing: 0.04em; }
.brand-sub { margin: 0; color: var(--muted); font-size: 0.85rem; }
.seal { flex: none; }

.mode-pill {
  margin: 0; padding: 0.25rem 0.8rem; border-radius: 999px;
  background: var(--pale); color: var(--ocean); font-size: 0.85rem; font-weight: 600;
  border: 1px solid var(--line);
}

main { max-width: 1120px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem) 3rem; }

.hero {
  display: grid; gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: 1fr;
  padding-top: clamp(0.5rem, 2vw, 2rem);
}
@media (min-width: 900px) {
  .hero { grid-template-columns: 1.05fr 0.95fr; align-items: start; }
}

h1 {
  font-size: clamp(1.75rem, 1.2rem + 2.6vw, 2.8rem);
  line-height: 1.35; margin: 0 0 1rem; font-weight: 700;
}
.lead { font-size: 1.05rem; margin: 0 0 0.75rem; }
.demo-status {
  display: inline-block; margin: 0 0 1.25rem; padding: 0.4rem 0.8rem;
  background: var(--pale); border-radius: 10px; color: var(--ink); font-size: 0.9rem;
}

.boundary { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 600px) { .boundary { grid-template-columns: 1fr 1fr; } }
.boundary section {
  background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 1rem 1.1rem;
}
.boundary h2 { font-size: 1rem; margin: 0 0 0.4rem; color: var(--ocean); }
.boundary ul { margin: 0; padding-left: 1.2rem; font-size: 0.92rem; }
.boundary li { margin: 0.15rem 0; }
.note { font-size: 0.85rem; color: var(--muted); margin: 0.6rem 0 0; }

.sheet {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: clamp(1.1rem, 3vw, 1.75rem);
}
.sheet-title { margin: 0 0 0.75rem; font-size: 1.2rem; }

button { font: inherit; cursor: pointer; border-radius: 12px; }
button:disabled { cursor: not-allowed; opacity: 0.55; }
.primary {
  width: 100%; margin-top: 0.8rem; padding: 0.85rem 1rem; border: none;
  background: var(--ocean); color: var(--white); font-weight: 700; font-size: 1.05rem;
}
.primary:not(:disabled):hover { background: #0f5a71; }
.secondary {
  width: 100%; padding: 0.75rem 1rem; border: 1.5px solid var(--ocean);
  background: var(--white); color: var(--ocean); font-weight: 700;
}
.secondary:not(:disabled):hover { background: var(--pale); }
.secondary.small { width: auto; padding: 0.4rem 0.9rem; font-size: 0.9rem; }

.notice {
  font-size: 0.85rem; color: var(--amber); background: #fff7ec; border-radius: 10px;
  padding: 0.5rem 0.75rem; margin: 0.6rem 0 0;
}

.divider { border-top: 1px dashed var(--line); margin: 1.25rem 0; }

#sample-picker:focus { outline: none; }

.rule-updates {
  padding: 0.85rem 1rem; border: 1px dashed var(--ocean); border-radius: 12px;
  background: var(--paper); font-size: 0.9rem;
}
.rule-updates h3 { margin: 0 0 0.4rem; font-size: 1rem; color: var(--ocean); }
.rule-updates dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.2rem 0.8rem; margin: 0; }
.rule-updates dt { color: var(--muted); }
.rule-updates dd { margin: 0; font-weight: 600; }
@media (max-width: 420px) {
  .rule-updates dl { grid-template-columns: 1fr; }
  .rule-updates dd { margin-bottom: 0.3rem; }
}

.scenarios { border: none; margin: 0 0 0.8rem; padding: 0; }
.scenarios legend { font-weight: 600; margin-bottom: 0.4rem; padding: 0; }
.scenario-list { display: grid; gap: 0.5rem; }
.scenario {
  display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.6rem 0.75rem;
  border: 1px solid var(--line); border-radius: 12px; background: var(--paper); cursor: pointer;
}
.scenario input { margin-top: 0.35rem; accent-color: var(--ocean); flex: none; }
.scenario:has(input:checked) { border-color: var(--ocean); background: var(--pale); }
.scenario-text { display: flex; flex-direction: column; }
.scenario-name { font-weight: 700; }
.scenario-desc { font-size: 0.82rem; color: var(--muted); }

.status { min-height: 1.5rem; margin: 1.25rem 0 0.5rem; color: var(--muted); }
.error {
  border: 1.5px solid #ecc89a; background: #fff7ec; color: var(--ink);
  border-radius: 14px; padding: 0.9rem 1.1rem; margin-bottom: 1rem;
}
.error p { margin: 0.2rem 0; }
.error-title { font-weight: 700; color: var(--amber); }

.report { margin-top: 1rem; }
.report-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.report-head h2 { margin: 0; font-size: clamp(1.3rem, 1.1rem + 1vw, 1.7rem); }
.synthetic-banner {
  margin: 0.75rem 0 0; padding: 0.5rem 0.8rem; border-radius: 10px;
  background: var(--pale); color: var(--ocean); font-weight: 600; font-size: 0.92rem;
}

.meta {
  display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1rem;
  margin: 1rem 0; font-size: 0.92rem;
}
.meta dt { color: var(--muted); }
.meta dd { margin: 0; overflow-wrap: anywhere; }
.meta .redirects { margin: 0; padding-left: 1.2rem; }
@media (max-width: 520px) {
  .meta { grid-template-columns: 1fr; }
  .meta dd { margin-bottom: 0.4rem; }
}

.summary { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1rem; }
.summary-item {
  margin: 0; padding: 0.4rem 0.8rem; border-radius: 10px; display: flex; gap: 0.5rem; align-items: baseline;
  border: 1px solid var(--line);
}
.summary-label { font-weight: 600; }

.filters { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.filter {
  padding: 0.35rem 0.9rem; border: 1px solid var(--line); background: var(--white); color: var(--ink);
  border-radius: 999px; font-size: 0.9rem;
}
.filter[aria-pressed="true"] { background: var(--ink); color: var(--white); border-color: var(--ink); }

.findings { list-style: none; counter-reset: item; margin: 0; padding: 0; display: grid; gap: 0.8rem; }
.finding {
  counter-increment: item; position: relative;
  border: 1px solid var(--line); border-left: 5px solid var(--line); border-radius: 14px;
  padding: 0.9rem 1rem 0.9rem 3rem; background: var(--white);
}
.finding::before {
  content: counter(item); position: absolute; left: 0.9rem; top: 0.95rem;
  width: 1.5rem; height: 1.5rem; border-radius: 50%; background: var(--pale); color: var(--ocean);
  font-size: 0.8rem; font-weight: 700; display: flex; align-items: center; justify-content: center;
}
.finding.status-needs_attention { border-left-color: var(--amber); }
.finding.status-observed { border-left-color: var(--ocean); }
.finding.status-unknown { border-left-color: #9fb4bf; border-left-style: dashed; }
.finding-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.4rem 1rem; }
.finding-title { margin: 0; font-size: 1.05rem; }
.finding-text { margin: 0.4rem 0; }
.chips { margin: 0; display: flex; flex-wrap: wrap; gap: 0.3rem; }
.chip {
  display: inline-block; padding: 0.05rem 0.6rem; border-radius: 999px; font-size: 0.78rem;
  font-weight: 600; border: 1px solid transparent;
}
.chip-needs_attention { background: #fff4e6; color: var(--amber); border-color: #ecc89a; }
.chip-observed { background: var(--pale); color: var(--ocean); border-color: #b5d9e5; }
.chip-unknown { background: #f1f4f6; color: var(--muted); border: 1px dashed #9fb4bf; }
.chip-certainty, .chip-category { background: var(--paper); color: var(--muted); border-color: var(--line); }

.finding-details summary {
  cursor: pointer; color: var(--ocean); font-weight: 600; font-size: 0.92rem; padding: 0.2rem 0;
}
.finding-details h4 { margin: 0.7rem 0 0.2rem; font-size: 0.9rem; }
.finding-details ul, .finding-details ol { margin: 0; padding-left: 1.3rem; font-size: 0.9rem; }
.evidence li { overflow-wrap: anywhere; font-family: ui-monospace, Menlo, "Hiragino Sans", monospace; font-size: 0.85rem; }
.limitation { margin: 0; font-size: 0.88rem; color: var(--muted); }

.limits { margin-top: 1.25rem; font-size: 0.9rem; }
.limits summary { cursor: pointer; font-weight: 600; color: var(--ocean); }
.limits ul { padding-left: 1.3rem; }

.site-footer {
  max-width: 1120px; margin: 0 auto; padding: 1.5rem clamp(1rem, 4vw, 2rem) 2.5rem;
  color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--line);
}
.site-footer p { margin: 0 0 0.4rem; }

.notfound { max-width: 40rem; margin: clamp(1rem, 6vw, 4rem) auto 0; }
.notfound h1 { font-size: clamp(1.4rem, 1.1rem + 1.5vw, 2rem); }
.notfound .primary { display: inline-block; width: auto; text-decoration: none; text-align: center; }

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