/* Baseline theme. Structure-only styling meant to be replaced by a site-specific design.
   All colors/typography are tokens on :root. Uses logical properties so RTL works. */
:root {
  --c-primary: #1f3a5f;
  --c-secondary: #3c7a89;
  --c-accent: #e0a458;
  --c-soft: #c9d6df;
  --c-bg: #f7f9fb;
  --c-surface: #ffffff;
  --c-text: #1b2733;
  --c-muted: #5b6b7a;
  --font-body: system-ui, -apple-system, "Segoe UI", "Noto Sans", "Noto Sans JP", "Noto Sans TC", "Noto Sans Arabic", sans-serif;
  --font-head: var(--font-body);
  --radius: 10px;
  --wrap: 1160px;
  --gap: clamp(16px, 3vw, 28px);
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--c-bg); color: var(--c-text); font: 17px/1.7 var(--font-body); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.25; color: var(--c-text); }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); margin: .2em 0 .4em; }
h2 { font-size: clamp(1.4rem, 3vw, 1.8rem); margin: 2em 0 .6em; }
h3 { font-size: 1.15rem; margin: 1.4em 0 .4em; }
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 16px; }
.skip-link { position: absolute; inset-inline-start: -999px; top: 8px; background: var(--c-surface); padding: 8px 12px; z-index: 10; }
.skip-link:focus { inset-inline-start: 8px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* header */
.site-header { background: var(--c-surface); border-bottom: 1px solid var(--c-soft); position: sticky; top: 0; z-index: 5; }
.header-inner { display: flex; align-items: center; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--c-text); font-weight: 700; font-size: 1.1rem; }
.nav-toggle { margin-inline-start: auto; display: none; background: none; border: 1px solid var(--c-soft); border-radius: var(--radius); padding: 6px 12px; font: inherit; cursor: pointer; }
.site-nav { margin-inline-start: auto; }
.site-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 18px; margin: 0; padding: 0; }
.site-nav a { text-decoration: none; color: var(--c-text); font-size: .95rem; padding: 6px 0; display: inline-block; }
.site-nav a[aria-current="page"] { color: var(--c-primary); box-shadow: inset 0 -2px 0 var(--c-accent); }
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; width: 100%; margin: 0; }
  .nav-open .site-nav { display: block; }
  .site-nav ul { flex-direction: column; padding-bottom: 12px; }
}

/* layout pieces */
main { padding-block: 24px 64px; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0 0 12px; font-size: .88rem; color: var(--c-muted); }
.breadcrumb li + li::before { content: "/"; margin-inline-end: 6px; color: var(--c-soft); }
.eyebrow { text-transform: uppercase; letter-spacing: .06em; font-size: .78rem; color: var(--c-secondary); margin: 0; font-weight: 600; }
.lead { font-size: 1.15rem; color: var(--c-muted); max-width: 70ch; }
.meta { font-size: .88rem; color: var(--c-muted); }
.page-head { margin-bottom: 24px; }
.btn, .btn-secondary, button[type="submit"] { display: inline-block; padding: 10px 18px; border-radius: var(--radius); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; border: 2px solid var(--c-primary); }
.btn, button[type="submit"] { background: var(--c-primary); color: #fff; }
.btn-secondary { background: transparent; color: var(--c-primary); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: var(--gap); align-items: center; padding-block: 16px 24px; }
.hero-points { padding-inline-start: 1.2em; }
.hero-media img { border-radius: var(--radius); }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; } }

.grid { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card { background: var(--c-surface); border: 1px solid var(--c-soft); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.card-body { padding: 16px 18px 18px; }
.card h3 { margin: .3em 0; }
.card h3 a { text-decoration: none; color: var(--c-text); }
.card p { margin: .4em 0; }

.intro-split { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--gap); align-items: start; }
@media (max-width: 860px) { .intro-split { grid-template-columns: 1fr; } }

/* article */
.prose { max-width: 75ch; }
.prose table { font-size: .95rem; }
.cover img { border-radius: var(--radius); margin-bottom: 24px; }
.article-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 40px; align-items: start; }
.toc { position: sticky; top: 84px; font-size: .9rem; border-inline-start: 3px solid var(--c-soft); padding-inline-start: 14px; }
.toc h2 { font-size: .95rem; margin: 0 0 8px; }
.toc ol { padding-inline-start: 1.1em; margin: 0; }
@media (max-width: 960px) { .article-layout { grid-template-columns: 1fr; } .toc { position: static; } }
.callout { background: var(--c-surface); border-inline-start: 4px solid var(--c-accent); padding: 4px 18px; margin: 1.4em 0; border-radius: 0 var(--radius) var(--radius) 0; }
.related-tool { background: var(--c-surface); border: 1px solid var(--c-soft); border-radius: var(--radius); padding: 8px 22px 22px; margin-top: 40px; }

.table-wrap { overflow-x: auto; margin: 1.2em 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; background: var(--c-surface); }
th, td { border: 1px solid var(--c-soft); padding: 9px 12px; text-align: start; vertical-align: top; }
th { background: var(--c-bg); font-weight: 600; }
th .sort { all: unset; cursor: pointer; font-weight: 600; }
th[aria-sort="ascending"] .sort::after { content: " ▲"; }
th[aria-sort="descending"] .sort::after { content: " ▼"; }
.table-tools { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; }
.hint { font-size: .85rem; color: var(--c-muted); margin: 0; }

/* tools */
.tool-panel { background: var(--c-surface); border: 1px solid var(--c-soft); border-radius: var(--radius); padding: clamp(16px, 3vw, 28px); margin-bottom: 32px; }
.fields { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.field label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 4px; }
.input-unit { display: flex; align-items: center; border: 1px solid var(--c-soft); border-radius: var(--radius); background: #fff; }
.input-unit input { border: 0; flex: 1; min-width: 0; padding: 10px 12px; font: inherit; background: transparent; }
.unit { padding-inline: 10px; color: var(--c-muted); font-size: .9rem; }
select, input[type="search"], .quote-input input { width: 100%; padding: 10px 12px; font: inherit; border: 1px solid var(--c-soft); border-radius: var(--radius); background: #fff; }
.actions { margin-block: 18px; }
.results dl { display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); margin: 0; }
.result-row { background: var(--c-bg); border-radius: var(--radius); padding: 12px 14px; }
.result-row dt { font-size: .85rem; color: var(--c-muted); }
.result-row dd { margin: 0; font-size: 1.35rem; font-weight: 700; }
.note { font-size: .85rem; color: var(--c-muted); }
.checklist { list-style: none; padding: 0; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-bottom: 1px solid var(--c-soft); }
.checklist input { width: 20px; height: 20px; margin-top: 4px; flex: none; }
.progress { font-weight: 600; }

.faq details { background: var(--c-surface); border: 1px solid var(--c-soft); border-radius: var(--radius); padding: 12px 16px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 600; }
.link-list { list-style: none; padding: 0; }
.link-list li { padding: 10px 0; border-bottom: 1px solid var(--c-soft); }
.link-list p { margin: 4px 0 0; color: var(--c-muted); font-size: .95rem; }
.search-results { list-style: none; padding: 0; }
.search-results li { padding: 12px 0; border-bottom: 1px solid var(--c-soft); }
.disclosure { margin-top: 48px; font-size: .95rem; color: var(--c-muted); }

/* footer */
.site-footer { background: var(--c-surface); border-top: 1px solid var(--c-soft); padding-block: 32px; font-size: .92rem; }
.site-footer .wrap { display: grid; gap: 20px; grid-template-columns: 1.2fr 1fr 1fr; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.footer-note, .copyright { grid-column: 1 / -1; color: var(--c-muted); margin: 0; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr; } }

/* Editorial design system, 2026-10-24. Original theme retained in rollout backups. */
:root{--wrap:1280px;--gap:clamp(20px,3vw,36px);--radius:18px;--c-text:#172529;--c-muted:#4d6065}
html{scroll-padding-top:150px}body{font-size:16px;line-height:1.75}h1,h2,h3{text-wrap:balance;overflow-wrap:anywhere}h1{font-size:clamp(2.15rem,4.6vw,4.35rem);line-height:1.12;letter-spacing:-.035em;font-weight:600}h2{font-size:clamp(1.65rem,3vw,2.6rem);letter-spacing:-.025em;line-height:1.2}h3{font-size:1.24rem;line-height:1.35}p,li,a{overflow-wrap:anywhere}figure{margin:0}.wrap{padding-inline:clamp(18px,4vw,56px)}main{padding-block:40px 88px}.site-header{position:relative;border-top:4px solid var(--c-primary);border-bottom:1px solid var(--c-soft)}.header-inner{padding-block:18px;gap:18px 28px}.brand{font-size:1.35rem;letter-spacing:-.025em}.brand img{width:38px;height:38px}.site-nav a{font-size:.86rem;font-weight:600;padding-block:10px}.site-nav a:hover{color:var(--c-primary);text-decoration:underline}.hero{gap:clamp(28px,4vw,64px);padding-block:24px 64px;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}.hero-text{min-width:0}.eyebrow{font-size:.75rem;letter-spacing:.1em;font-weight:700;color:var(--c-primary)}.hero .eyebrow{display:inline-block;border-bottom:2px solid var(--c-accent);padding-bottom:8px;margin-bottom:16px}.lead{font-size:clamp(1.05rem,1.5vw,1.2rem);line-height:1.8}.hero-points{font-size:.9rem;padding-inline-start:1.2em;margin-block:24px}.hero-points li{padding-inline-start:6px;margin-block:8px}.hero-points li::marker{color:var(--c-primary)}.hero-media{align-self:stretch;display:flex;align-items:center;position:relative}.hero-media img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius);background:var(--c-soft)}.hero .cta{margin-top:28px}.btn,.btn-secondary,button[type=submit]{padding:13px 22px;font-size:.9rem;border-radius:8px;min-height:48px;line-height:1.5}.btn:hover,button[type=submit]:hover{filter:brightness(.9)}.btn-secondary:hover{background:var(--c-soft)}.home main>section:not(.hero){border-top:1px solid var(--c-soft);padding-block:12px 38px}.home main>section>h2{margin-block:34px 28px}.grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}.card{border:1px solid var(--c-soft);box-shadow:0 8px 24px #122a3205;transition:transform .18s ease,box-shadow .18s ease}.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px #122a3210}.card-media{display:block;overflow:hidden;background:var(--c-soft)}.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover}.card-body{padding:24px;flex:1;display:flex;flex-direction:column;align-items:flex-start}.card-body>p:not(.eyebrow):not(.meta){color:var(--c-muted);font-size:.94rem}.card-body .meta{margin-top:auto;padding-top:20px;font-size:.78rem}.card h3{margin-block:10px}.cat-card{border-radius:var(--radius)}.tool-card{border-top:3px solid var(--c-primary)}.tool-card .card-media img{aspect-ratio:2/1}.page-head{max-width:960px;margin-block:20px 36px}.page-head h1{font-size:clamp(2rem,4vw,3.6rem)}.breadcrumb{font-size:.8rem}.breadcrumb ol{gap:8px}.cover{max-width:1080px}.cover img{width:100%;max-height:560px;object-fit:cover;aspect-ratio:16/9;margin-bottom:48px}.article-layout{grid-template-columns:220px minmax(0,1fr);gap:56px}.article-layout:not(:has(.toc)){grid-template-columns:1fr}.prose{font-size:1.06rem;line-height:1.9;max-width:72ch}.prose h2{font-size:clamp(1.5rem,2.5vw,2rem);margin-top:2.2em}.prose a{text-decoration-thickness:1px}.prose li{margin-bottom:.55em}.toc{top:24px;background:var(--c-surface);padding:20px;border-radius:10px}.intro-split{gap:48px}.intro-split img{border-radius:var(--radius);width:100%;object-fit:cover}.tool-panel{padding:clamp(20px,4vw,48px);box-shadow:0 12px 40px #122a3208}.fields,.results dl{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}.input-unit{border-color:#9eafb3;min-height:50px}.input-unit:focus-within{outline:2px solid var(--c-primary);outline-offset:3px}input,select{color:var(--c-text)}.result-row{padding:22px}.result-row dd{font-size:1.8rem;color:var(--c-primary)}.table-wrap{border:1px solid var(--c-soft);border-radius:12px}.table-wrap table{min-width:540px}th,td{padding:17px 20px;border:0;border-bottom:1px solid var(--c-soft);font-size:.92rem}th{background:var(--c-primary);color:#fff}tbody tr:nth-child(even){background:var(--c-bg)}.faq details{padding:20px 24px;border-radius:12px}.faq summary{line-height:1.6}.faq details[open]{border-color:var(--c-primary)}.faq details[open] summary{margin-bottom:16px;color:var(--c-primary)}.related-tool{padding:26px 32px}.disclosure{background:var(--c-surface);border:1px solid var(--c-soft);padding:24px!important;border-radius:12px}.disclosure h2{font-size:1.3rem;margin-top:0!important}.site-footer{background:var(--c-primary);color:#fff;padding-block:56px}.site-footer a,.site-footer strong{color:#fff}.site-footer a{text-decoration:none}.site-footer a:hover{text-decoration:underline}.site-footer .footer-note,.site-footer .copyright{color:#fff;opacity:.85}.site-footer .wrap{gap:28px 48px}.footer-brand strong{font-size:1.5rem}.footer-brand p{max-width:32ch}.site-footer nav{font-size:.85rem}.site-footer li{margin-bottom:12px}.copyright{padding-top:24px;border-top:1px solid #ffffff40}.skip-link:focus{z-index:20;background:#fff;color:#172529}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--c-primary);outline-offset:4px}.site-footer a:focus-visible{outline-color:#fff}
@media(min-width:1100px){.site-nav{width:100%;margin-inline-start:0;border-top:1px solid var(--c-soft);padding-top:10px}.site-nav ul{gap:6px 28px}.header-inner{gap:12px}.guides{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:960px){.article-layout{grid-template-columns:1fr;gap:24px}.toc{position:static}.hero{gap:28px}.hero-media img{aspect-ratio:4/5}}
@media(max-width:860px){.hero{grid-template-columns:1fr;padding-block:10px 36px}.hero-media img{aspect-ratio:16/10;max-height:460px}.site-header{position:relative}.header-inner{padding-block:14px}.brand{max-width:calc(100% - 100px)}.brand-name{overflow-wrap:anywhere}.site-nav{border-top:1px solid var(--c-soft);padding-top:12px}.intro-split{grid-template-columns:1fr}.home main>section:not(.hero){padding-bottom:28px}.hero h1{max-width:20ch}.toc{top:auto}}
@media(max-width:480px){main{padding-top:24px}.grid{grid-template-columns:1fr}.card-body{padding:22px}.hero .cta{flex-direction:column;align-items:stretch}.hero .cta a{text-align:center}.header-inner{gap:12px}.brand{font-size:1.12rem}.nav-toggle{padding:8px;min-height:44px}.prose{font-size:1rem}.faq details{padding:16px}.tool-panel{padding:18px}.page-head h1{font-size:2rem}.cover img{margin-bottom:28px}.table-wrap{max-width:100%}.site-footer .wrap{grid-template-columns:1fr}}
[dir=rtl] h1,[dir=rtl] h2,[dir=rtl] .eyebrow{letter-spacing:normal}[dir=rtl] .callout{border-radius:var(--radius)}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}.card:hover{transform:none}}
@media print{.site-header,.site-footer,.toc,.cta{display:none}.article-layout{display:block}.cover img{max-height:240px}.card{break-inside:avoid}}

:root{--c-primary:#3d2c4d;--c-secondary:#7b4b94;--c-accent:#f2a65a;--c-soft:#e6dcef;--c-bg:#faf7fc;--c-surface:#ffffff;--font-head:Georgia, Cambria, serif}
:root{--radius:12px}.hero-media img{border-start-start-radius:70px}.card h3{font-weight:600}.cat-card{border-bottom:3px solid var(--c-primary)}

/* Keep long editorial tables within the reading column. */
.article-layout>*,.intro-split>*{min-width:0}.prose{min-width:0;overflow-wrap:anywhere}.prose table{display:block;max-width:100%;overflow-x:auto}.prose pre{max-width:100%;overflow-x:auto}