:root {
  color-scheme: light;
  --ink: #132b44;
  --ink-soft: #46596d;
  --paper: #f4f7fa;
  --surface: #ffffff;
  --line: #ccd6df;
  --accent: #bd5107;
  --accent-dark: #8f3900;
  --info: #e7f1f7;
  --warning: #fff3d8;
  --warning-ink: #6d4500;
  --ok: #e7f4ec;
  --ok-ink: #175b35;
  --radius: 14px;
  font-family: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.65; }
button, input, select { font: inherit; }
a { color: #0a5a95; text-underline-offset: 3px; }
.shell { width: min(1080px, calc(100% - 32px)); margin-inline: auto; }
.hidden { display: none !important; }
.site-header { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px max(16px, calc((100% - 1080px) / 2)); background: var(--ink); color: #fff; }
.brand { color: #fff; text-decoration: none; font-weight: 800; letter-spacing: .02em; }
.brand span { color: #ff9d45; }
.intro { display: grid; grid-template-columns: 1.4fr .8fr; gap: 36px; padding-block: 56px 34px; align-items: end; }
.eyebrow { color: var(--accent-dark); font-size: .875rem; font-weight: 800; letter-spacing: .08em; margin: 0 0 8px; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.18; letter-spacing: -.035em; margin: 0 0 20px; max-width: 18ch; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.3; margin: 0; }
h3 { line-height: 1.35; }
.lead { color: var(--ink-soft); font-size: 1.125rem; max-width: 62ch; margin: 0; }
.problem-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.problem-list li { background: var(--surface); border-left: 5px solid var(--accent); padding: 13px 16px; font-weight: 700; box-shadow: 0 7px 22px rgba(19,43,68,.07); }
.navigator, .results { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 16px 48px rgba(19,43,68,.09); padding: clamp(20px, 4vw, 42px); }
.section-heading, .results-header { display: flex; justify-content: space-between; gap: 20px; align-items: end; }
.progress-text { margin: 0; font-weight: 800; white-space: nowrap; }
.progress-track { height: 8px; background: #e3e9ee; border-radius: 99px; margin: 20px 0 12px; overflow: hidden; }
.progress-track span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s ease; }
fieldset { border: 0; padding: 28px 0; margin: 0; border-top: 1px solid var(--line); }
fieldset:first-of-type { border-top: 0; }
legend { font-size: 1.125rem; font-weight: 800; padding: 0; }
legend span { display: inline-grid; place-items: center; width: 38px; height: 30px; margin-right: 8px; border-radius: 7px; background: var(--ink); color: white; font-size: .875rem; }
.field-help { color: var(--ink-soft); margin: 8px 0 14px; }
.choice-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 14px; }
.choice-grid.three { grid-template-columns: repeat(3, 1fr); }
.choice-grid.two { grid-template-columns: repeat(2, 1fr); }
.choice-grid.single { grid-template-columns: 1fr; }
.choice-grid label { position: relative; min-width: 0; }
.choice-grid input { position: absolute; inset: 0; opacity: 0; pointer-events: none; }
.choice-grid label span { min-height: 56px; display: flex; align-items: center; justify-content: center; text-align: center; padding: 10px 12px; border: 2px solid var(--line); border-radius: 10px; cursor: pointer; font-weight: 700; background: #fff; }
.choice-grid input:focus-visible + span { outline: 3px solid #83b6dc; outline-offset: 2px; }
.choice-grid input:checked + span { border-color: var(--accent); background: #fff5e9; box-shadow: inset 0 0 0 1px var(--accent); }
.context-note { margin: 14px 0 0; padding: 11px 14px; border-radius: 8px; background: var(--warning); color: var(--warning-ink); font-weight: 600; }
.dimension-inputs { margin-top: 14px; padding: 16px; background: var(--info); border-radius: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.dimension-inputs label { font-weight: 700; }
.dimension-inputs label span { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.dimension-inputs input { width: 100%; min-height: 48px; border: 1px solid #8295a7; border-radius: 8px; padding: 8px; background: white; }
.dimension-inputs p { grid-column: 1 / -1; margin: 0; font-size: .875rem; }
.optional-settings { border: 1px solid var(--line); border-radius: 12px; margin-top: 16px; }
.optional-settings summary { cursor: pointer; padding: 16px; font-weight: 800; min-height: 54px; }
.optional-inner { padding: 0 16px 16px; display: grid; gap: 12px; }
select { min-height: 48px; border: 1px solid #8295a7; border-radius: 8px; padding: 8px 12px; background: white; }
.check-row { min-height: 48px; display: flex; align-items: center; gap: 10px; font-weight: 700; }
.check-row input { width: 22px; height: 22px; }
.form-actions { display: flex; gap: 18px; align-items: center; justify-content: flex-end; padding-top: 24px; }
.form-actions p { margin: 0; color: #a1381b; font-weight: 700; }
.primary-button, .text-button { min-height: 50px; border-radius: 9px; padding: 11px 20px; cursor: pointer; font-weight: 800; }
.primary-button { border: 0; background: var(--accent); color: #fff; box-shadow: 0 5px 0 #9b4305; }
.primary-button:hover { background: var(--accent-dark); }
.text-button { border: 1px solid var(--line); background: white; color: var(--ink); }
.results { margin-top: 32px; }
.result-overview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 24px 0; }
.overview-cell { border-radius: 12px; padding: 18px; background: var(--info); }
.overview-cell span { display: block; color: var(--ink-soft); font-size: .8125rem; font-weight: 800; margin-bottom: 4px; }
.overview-cell strong { font-size: 1.075rem; }
.candidate-list { display: grid; gap: 20px; }
.candidate-card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.card-head { display: flex; justify-content: space-between; gap: 16px; align-items: start; padding: 20px; border-bottom: 1px solid var(--line); }
.card-head h3 { margin: 0 0 4px; font-size: 1.35rem; }
.card-head p { margin: 0; color: var(--ink-soft); }
.status-badge { display: inline-block; border-radius: 999px; padding: 5px 10px; background: var(--warning); color: var(--warning-ink); font-size: .8125rem; font-weight: 800; white-space: nowrap; }
.status-badge.ok { background: var(--ok); color: var(--ok-ink); }
.key-answer { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 1px; background: var(--line); border-bottom: 1px solid var(--line); }
.key-answer > section { padding: 17px; background: #fff; }
.key-answer small { display: block; font-weight: 800; color: var(--ink-soft); margin-bottom: 4px; }
.key-answer strong { display: block; }
.key-answer em { display: block; color: var(--ink-soft); font-size: .8125rem; font-style: normal; margin-top: 4px; }
.card-body { padding: 20px; }
.reason-box { background: var(--info); border-radius: 10px; padding: 14px 16px; }
.reason-box h4, .card-body h4 { margin: 0 0 8px; }
.reason-box ul, .compact-list { margin: 0; padding-left: 20px; }
.supply-columns { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 16px; }
.supply-group { border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.supply-group h4 { display: flex; align-items: center; gap: 8px; }
.supply-group h4 span { font-size: .75rem; padding: 2px 7px; border-radius: 5px; background: #edf1f4; }
.meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 18px; }
.meta-panel { background: #f7f9fb; border-radius: 10px; padding: 14px; }
.meta-panel p { margin: 5px 0; }
.source-list, .seller-list { margin: 0; padding-left: 20px; }
.seller-unavailable { color: var(--ink-soft); font-weight: 700; }
.purchase-cta { display: inline-block; min-height: 44px; padding: 12px 16px; max-width: 100%; overflow-wrap: anywhere; font-weight: 800; background: var(--accent); color: white; border-radius: 8px; text-decoration: none; text-align: center; }
.advertising-label { color: var(--warning-ink); font-weight: 700; }
.seller-list li + li { margin-top: 14px; }
.meta-panel, .supply-group, .key-answer > section { min-width: 0; overflow-wrap: anywhere; }
fieldset { min-width: 0; }
footer a { color: inherit; }
.caution-list { color: var(--warning-ink); }
.exclusions { margin-top: 24px; border: 1px solid var(--line); border-radius: 10px; padding: 0 16px; }
.exclusions summary { min-height: 54px; display: flex; align-items: center; cursor: pointer; font-weight: 800; }
.exclusion-item { border-top: 1px solid var(--line); padding: 12px 0; }
.exclusion-item p { margin: 3px 0; }
.safety-note { margin-top: 24px; background: #f2f4f6; border-left: 5px solid var(--ink); padding: 16px 18px; }
.safety-note h3 { margin: 0 0 8px; }
.safety-note ul { margin: 0; padding-left: 20px; }
.method { padding-block: 58px 30px; }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }
.method-grid article, .trust article { background: white; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.method-grid h3, .trust h2 { margin: 0 0 8px; }
.method-grid p, .trust p { margin: 0; color: var(--ink-soft); }
.trust { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding-bottom: 56px; }
.trust h2 { font-size: 1.2rem; }
footer { background: var(--ink); color: #dce5ed; text-align: center; padding: 28px 16px; font-size: .875rem; }
footer p { margin: 4px 0; }

@media (max-width: 760px) {
  .shell { width: min(100% - 20px, 1080px); }
  .site-header { min-height: 58px; }
  .intro { grid-template-columns: 1fr; gap: 24px; padding-block: 34px 24px; }
  h1 { font-size: 2.1rem; }
  .navigator, .results { padding: 18px; border-radius: 14px; }
  .section-heading, .results-header { align-items: start; }
  .choice-grid, .choice-grid.three, .choice-grid.two { grid-template-columns: 1fr 1fr; }
  .choice-grid label span { justify-content: flex-start; text-align: left; }
  .dimension-inputs, .result-overview, .key-answer, .supply-columns, .meta-grid, .method-grid, .trust { grid-template-columns: 1fr; }
  .form-actions { align-items: stretch; flex-direction: column; }
  .primary-button { width: 100%; }
  .card-head { flex-direction: column; }
  .status-badge { white-space: normal; }
  .section-heading, .results-header { flex-wrap: wrap; }
  .key-answer { gap: 0; background: white; }
  .key-answer > section { border-top: 1px solid var(--line); }
}

@media (max-width: 410px) {
  .choice-grid, .choice-grid.three, .choice-grid.two { grid-template-columns: 1fr; }
  h1 { font-size: 1.85rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .progress-track span { transition: none; }
}

.intro-guide { margin: 16px 0 0; }
.intro-guide a { display: inline-block; min-height: 44px; padding: 10px 8px; }
.card-body > section, .card-body > details, .card-body > .key-answer { margin-top: 16px; }
.key-answer > section { min-width: 0; padding: 16px; background: white; overflow-wrap: anywhere; }
.key-answer p { margin: 6px 0; }
.important-notes { padding: 14px; border-left: 4px solid var(--warning-ink); background: var(--warning); border-radius: 8px; }
.important-notes p, .price-summary p { margin: 8px 0; }
.official-links { list-style: none; padding: 0; margin: 12px 0; }
.spec-link { display: inline-block; min-height: 44px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; font-weight: 700; }
.card-links .seller-list { list-style: none; padding: 0; }
.card-links .purchase-cta { display: block; }
.card-details { border-top: 1px solid var(--line); padding-top: 8px; }
.card-details summary { min-height: 48px; padding: 10px 0; cursor: pointer; font-weight: 700; }
.card-body li, .card-body a, .card-details summary { overflow-wrap: anywhere; }
.spec-link:focus-visible, .purchase-cta:focus-visible, summary:focus-visible { outline: 3px solid #83b6dc; outline-offset: 3px; }
@media (max-width: 760px) {
  .intro { padding-block: 24px 20px; }
  .key-answer > section { border-top: 1px solid var(--line); }
  .card-head > div { min-width: 0; }
}
.seller-unavailable a { display: inline-block; min-height: 44px; padding: 10px 0; }

/* Public entry and footer only; navigator and product cards retain their styles. */
.intro { grid-template-columns: 1fr; gap: 0; padding-block: 28px; }
.intro h1 { font-size: 32px; line-height: 1.35; max-width: none; margin-bottom: 12px; }
.intro .lead, .intro-advertising { font-size: 16px; }
.intro .intro-guide { margin: 16px 0 12px; }
.intro .intro-guide a { padding: 11px 18px; background: var(--accent); color: white; border-radius: 9px; font-weight: 800; text-decoration: none; }
.intro-advertising { margin: 0; }
.method { padding-block: 24px; }
.method > summary { min-height: 48px; padding: 10px 0; cursor: pointer; font-weight: 700; }
.method-content h3 { font-size: 16px; margin: 16px 0 6px; }
.method-content p { margin: 0; }
footer { font-size: 16px; text-align: left; }
.footer-links { margin-block: 8px 16px; overflow-wrap: anywhere; }
.footer-links a { display: inline-block; min-height: 44px; padding: 8px 0; }
.footer-policy { margin-top: 20px; }
.footer-policy h2 { font-size: 16px; line-height: 1.5; margin-bottom: 6px; }
.footer-policy p { font-size: 16px; }
@media (max-width: 760px) {
  .intro h1 { font-size: 26px; }
}
@media (max-width: 410px) {
  .intro h1 { font-size: 24px; }
}