/* 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; }
.figure { margin: 28px 0; }
.figure img { width: 100%; max-height: 560px; object-fit: contain; border: 1px solid var(--c-soft); border-radius: var(--radius); background: #fff; }
.figure figcaption { margin-top: 8px; font-size: .9rem; color: var(--c-muted); }
.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; } }
:root{--c-primary:#183f36;--c-secondary:#3c6654;--c-accent:#b84a26;--c-soft:#dfe5d9;--c-bg:#f4f2eb;--c-surface:#fffef9;--c-text:#1c3029;--c-muted:#526059;--font-body:Arial,Helvetica,sans-serif;--font-head:Georgia,serif;--radius:0;--wrap:1280px;--gap:24px}
body{font-size:16px}h1,h2{font-weight:400;letter-spacing:-.035em}h1{font-size:clamp(2.5rem,5.4vw,4.6rem)}h2{font-size:clamp(1.8rem,3vw,2.6rem)}.wrap{padding-inline:40px}.site-header{border-block-start:5px solid var(--c-primary);background:var(--c-surface);position:static}.header-inner{min-block-size:92px}.brand-name{font:600 25px Georgia,serif;letter-spacing:-.6px}.brand img{inline-size:38px;block-size:38px}.site-nav a{font-size:13px;font-weight:600}.site-nav ul{gap:22px}main>section{margin-block:64px}.hero{grid-template-columns:1.05fr 1fr;gap:54px;padding-block:60px 48px;border-block-end:1px solid #aebbb0;background-image:linear-gradient(90deg,#183f3606 1px,transparent 1px),linear-gradient(#183f3606 1px,transparent 1px);background-size:32px 32px;margin-block:0!important;border-radius:0;background-color:transparent}.hero .lead{font-size:18px}.hero-media img{aspect-ratio:4/4.1;inline-size:100%;object-fit:cover;border-radius:0;border-block-end:7px solid var(--c-accent)}.hero-media:before{content:'FIELD GUIDE / COMMERCIAL SYSTEMS';font:10px monospace;letter-spacing:1.5px;display:block;margin-block-end:12px;color:var(--c-muted)}.eyebrow{font:700 11px Arial,sans-serif;letter-spacing:1.7px;color:var(--c-accent);text-transform:uppercase}.hero-points{list-style:none;padding:0;counter-reset:points}.hero-points li{counter-increment:points;font-size:13px;display:flex;gap:14px}.hero-points li:before{content:'0' counter(points);font:11px monospace;color:var(--c-accent)}.btn,.btn-secondary,button{border-radius:0}.btn,.btn-secondary{padding:13px 18px;font-size:13px}.card{background:transparent;border:0;border-radius:0;box-shadow:none;overflow:visible}.card-media{overflow:hidden}.card-media img{border-radius:0;aspect-ratio:16/10;object-fit:cover}.card-body{padding:20px 0}.card h3{font-size:21px}.cats{counter-reset:cat}.cat-card{counter-increment:cat;border-block-end:2px solid var(--c-primary)}.cat-card h3:before{content:'0' counter(cat) ' / ';font:12px monospace;color:var(--c-accent)}.guides{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:40px;row-gap:26px}.guide-card{display:grid;grid-template-columns:155px minmax(0,1fr);gap:20px;border-block-start:1px solid #bcc6b9;padding-block-start:20px}.guide-card .card-media img{aspect-ratio:1;block-size:155px}.guide-card .card-body{padding:0}.guide-card h3{font:400 21px/1.3 Georgia,serif}.guide-card .eyebrow{font-size:9px}.card-body p{font-size:14px;line-height:1.6}.tools{grid-template-columns:repeat(3,minmax(0,1fr));padding:28px;background:var(--c-primary);gap:28px}.tool-card a,.tool-card .card-body p{color:#fff}.tool-card .card-body{padding-block-end:0}.tool-card h3{font:600 19px/1.3 Arial,sans-serif}.tool-card .card-media img{aspect-ratio:16/9}table{font-size:14px}th{background:var(--c-primary);color:#fff;font-size:12px}td,th{padding:16px}tbody tr:nth-child(even){background:#eff1e8}.table-wrap{border-radius:0}.faq{max-inline-size:900px}.faq details{border:0;border-block-start:1px solid #b6c2b5;border-radius:0;background:transparent;padding:17px 0}.faq summary{font:18px/1.5 Georgia,serif}.disclosure{padding:24px 28px;border:0;border-inline-start:4px solid var(--c-accent);background:#e7eadd;border-radius:0}.disclosure h2{font:600 14px Arial,sans-serif;letter-spacing:0}.disclosure p{font-size:13px}.breadcrumb{font-size:11px}.page-head{max-inline-size:980px;padding-block:40px 34px}.page-head h1{font-size:clamp(2.2rem,4.6vw,3.8rem)}.cover{max-inline-size:900px}.cover img{max-block-size:420px;object-fit:cover;border-radius:0}.article-layout{grid-template-columns:230px minmax(0,760px);gap:60px}.toc{border:0;border-block-start:3px solid var(--c-accent);border-radius:0;background:transparent;font-size:12px}.toc h2{font:700 11px Arial,sans-serif;letter-spacing:1px;text-transform:uppercase}.prose{max-inline-size:76ch;min-inline-size:0}.prose h2{font-size:30px;margin-block:44px 18px}.prose h3{font:600 19px/1.4 Arial,sans-serif}.prose table{min-inline-size:0}.related-tool{border-radius:0;background:var(--c-soft)}.tool-panel{border:0;border-block-start:5px solid var(--c-accent);border-radius:0;background:var(--c-surface);max-inline-size:1000px}.field input,.field select,input[data-search],input[data-table-filter]{border-radius:0;min-block-size:48px;background:#fff;border-color:#7c907d}.field label{font-size:13px}.results{border-radius:0;background:transparent;border-block-start:1px solid #bcc6b9}.results dd{font:32px/1.3 Georgia,serif}.results dt{font-size:12px}.site-footer{background:var(--c-primary);color:#f4f2eb;border-block-start:6px solid var(--c-accent);margin-block-start:80px}.site-footer a{color:#f4f2eb}.footer-brand strong{font:30px Georgia,serif}.footer-note,.copyright{font-size:11px;color:#dfe5d9}.site-footer nav{font-size:12px}.link-list{border-radius:0}.link-list li{border-block-end:1px solid #b8c4b7;padding-block:20px}.link-list li>a{font:24px Georgia,serif}figcaption{font-size:11px;color:var(--c-muted)}.scope-route{display:flex;gap:24px;border-block-end:1px solid #b8c4b7;padding-block:24px;font:13px Arial,sans-serif}.scope-route a{flex:1;text-decoration:none}.scope-route span{color:var(--c-accent);font:11px monospace;margin-inline-end:10px}
@media(max-width:1000px){.wrap{padding-inline:24px}.site-nav ul{gap:13px}.site-nav a{font-size:11px}.hero{gap:28px}.hero h1{font-size:52px}.article-layout{grid-template-columns:190px minmax(0,1fr);gap:28px}.guide-card{grid-template-columns:110px minmax(0,1fr);gap:15px}.guide-card .card-media img{block-size:110px}.tools{padding:20px;gap:20px}}
@media(max-width:760px){.wrap{padding-inline:20px}.header-inner{min-block-size:76px}.hero{display:flex;flex-direction:column;padding-block:34px 30px;gap:30px}.hero h1{font-size:clamp(43px,9vw,60px)}.hero .lead{font-size:17px}.hero-media img{aspect-ratio:4/3;max-block-size:460px}.hero-points li{font-size:12px}.cats{grid-template-columns:1fr;gap:24px}.cat-card{display:grid;grid-template-columns:100px minmax(0,1fr);gap:18px;padding-block-end:20px}.cat-card .card-media img{aspect-ratio:1;block-size:100px}.cat-card .card-body{padding:0}.cat-card h3{font-size:19px}.cat-card p{font-size:13px}.guides{grid-template-columns:1fr}.guide-card{grid-template-columns:90px minmax(0,1fr);gap:16px}.guide-card .card-media img{block-size:90px}.guide-card h3{font-size:20px}.tools{grid-template-columns:1fr;padding:22px}.tool-card{display:grid;grid-template-columns:80px minmax(0,1fr);gap:18px}.tool-card .card-media img{aspect-ratio:1;block-size:80px}.tool-card .card-body{padding:0}.tool-card h3{font-size:18px}.tool-card p{font-size:13px}.article-layout{display:block}.toc{position:static;margin-block-end:28px}.page-head{padding-block:26px}.page-head h1{font-size:38px}.cover img{aspect-ratio:4/3}.prose h2{font-size:28px}.prose td,.prose th{padding:8px;font-size:12px}.fields{grid-template-columns:1fr}.scope-route{gap:12px;font-size:11px}.scope-route span{display:block;margin-block-end:8px}.site-nav a{font-size:13px}main>section{margin-block:42px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.card{min-inline-size:0;overflow-wrap:anywhere}.tools .card h3 a,.tools .card p{color:#fff}.tools .card .meta{color:#e0e7df}.tool-error{color:#9b311b;font-weight:600;font-size:14px}.tool-error:empty{display:none}.results[hidden]{display:none}.input-unit{border-color:#7c907d}.input-unit input{inline-size:100%}.nav-toggle{min-block-size:44px}.checklist label{cursor:pointer}.result-row{border-radius:0;background:#eff1e8}.prose a{overflow-wrap:anywhere}.hero .eyebrow{margin-block-end:18px}.hero h1{margin-block-end:24px}.hero .lead{margin-block-end:24px}
@media(max-width:760px){.site-nav ul{display:grid;grid-template-columns:1fr 1fr}.site-nav a{padding-block:12px}.intro-split{grid-template-columns:1fr}.prose{max-inline-size:100%}.results dl{grid-template-columns:1fr}.fields{grid-template-columns:1fr}.hero .cta{display:grid;grid-template-columns:1fr}.hero .cta a{text-align:center}.site-footer .wrap{grid-template-columns:1fr}}

/* Homepage photographic field journal ? 2026-11-01 */
.home .hero{grid-template-columns:minmax(0,.95fr) minmax(0,1.15fr);gap:48px;align-items:start}
.home .hero-text{padding-block:12px}
.home .hero h1{font-size:clamp(2.75rem,4.5vw,4.4rem);line-height:1.04;max-inline-size:14ch}
.home .hero-visual{min-inline-size:0}
.home .hero-media{margin:0}
.home .hero-media img{aspect-ratio:16/11;block-size:auto;border-block-end:5px solid var(--c-accent)}
.home .hero-media figcaption{margin-block:8px 16px}
.home .hero-details{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.home .hero-detail{display:block;text-decoration:none;color:var(--c-text);border-block-end:1px solid #aebbb0;padding-block-end:12px;min-inline-size:0}
.home .hero-detail>img{inline-size:100%;aspect-ratio:16/9;object-fit:cover}
.home .hero-detail>span{display:flex;justify-content:space-between;gap:12px;font:600 12px/1.5 Arial,sans-serif;margin-block-start:10px}
.home .hero-detail>span>span{color:var(--c-accent);font-size:19px;flex:none}
.home .hero-detail:hover>span{text-decoration:underline;text-underline-offset:4px}
.home .cats{gap:28px}
.home .cat-card .card-media img{aspect-ratio:4/3;inline-size:100%}
.home .guides{grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.home .guide-card{display:flex;gap:0;padding-block-start:0;border-block-start:0;border-block-end:1px solid #bcc6b9}
.home .guide-card .card-media img{inline-size:100%;block-size:auto;aspect-ratio:16/11}
.home .guide-card .card-body{padding-block:18px 22px}
.home .guide-card h3{font-size:23px}
.home .guide-card .meta{font:11px monospace;letter-spacing:.4px;margin-block-start:16px}
.home .tools .card-media img{aspect-ratio:4/3}
.home a:focus-visible{outline:3px solid var(--c-accent);outline-offset:5px}
@media(max-width:1000px){.home .hero{gap:28px}.home .guides{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.home .hero{display:flex;gap:26px}.home .hero-text{padding:0}.home .hero h1{font-size:clamp(2.7rem,9vw,3.7rem);max-inline-size:none}.home .hero-visual{inline-size:100%}.home .hero-media img{aspect-ratio:4/3}.home .hero-details{gap:12px}.home .hero-detail>span{font-size:11px}.home .cat-card{display:flex;gap:0;padding-block-end:0}.home .cat-card .card-media img{block-size:auto;aspect-ratio:16/10}.home .cat-card .card-body{padding-block:18px 22px}.home .cat-card h3{font-size:23px}.home .guides{grid-template-columns:1fr;gap:26px}.home .guide-card .card-body{padding-block:16px 22px}.home .tool-card{display:flex;gap:0}.home .tool-card .card-media img{block-size:auto;aspect-ratio:16/9;inline-size:100%}.home .tool-card .card-body{padding-block-start:18px}.home .scope-route{gap:16px;flex-wrap:wrap}.home .scope-route a{min-inline-size:80px}}