:root {
  --ink: #152128;
  --muted: #5c6d75;
  --paper: #ffffff;
  --canvas: #f4f7f5;
  --line: #dbe4df;
  --brand: #126a5b;
  --brand-dark: #0b4e43;
  --accent: #dff5ea;
  --warm: #fff8e8;
  --shadow: 0 12px 34px rgba(22, 45, 38, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--canvas); font: 16px/1.7 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--brand); text-underline-offset: 3px; }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; height: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.site-header { background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px); }
.header-inner { width: min(1120px, calc(100% - 2rem)); margin: auto; min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.logo { color: var(--brand-dark); font-size: 1.2rem; font-weight: 800; text-decoration: none; letter-spacing: -.03em; }
.header-inner nav, .site-footer nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.header-inner nav a, .site-footer nav a { color: var(--muted); font-size: .93rem; font-weight: 650; text-decoration: none; }
.hero { padding: 5.5rem 1rem 4.5rem; background: radial-gradient(circle at 80% 20%, #d9f5e8, transparent 34%), linear-gradient(145deg, #f8fbf9, #eef6f2); border-bottom: 1px solid var(--line); }
.hero-inner { width: min(850px, 100%); margin: auto; text-align: center; }
.hero h1, .category-header h1 { margin: .35rem 0 1rem; font-size: clamp(2.4rem, 7vw, 4.8rem); line-height: 1.02; letter-spacing: -.055em; }
.hero p { max-width: 700px; margin: 0 auto 2rem; color: var(--muted); font-size: 1.15rem; }
.eyebrow { color: var(--brand); font-size: .75rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.search-box { display: block; max-width: 650px; margin: auto; }
.search-box input { width: 100%; border: 1px solid #c9d7d0; border-radius: 14px; background: var(--paper); padding: 1rem 1.1rem; color: var(--ink); font: inherit; box-shadow: var(--shadow); }
.search-box input:focus { outline: 3px solid rgba(18,106,91,.18); border-color: var(--brand); }
.content-shell, .page-shell { width: min(1120px, calc(100% - 2rem)); margin: 3rem auto 5rem; }
.page-shell { width: min(880px, calc(100% - 2rem)); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; }
.section-heading h2 { margin: .2rem 0; font-size: clamp(1.8rem, 4vw, 2.7rem); letter-spacing: -.035em; }
.category-chips { display: flex; flex-wrap: wrap; gap: .65rem; margin: 1.2rem 0 2rem; }
.category-chip { padding: .55rem .8rem; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); color: var(--ink); font-size: .9rem; font-weight: 700; text-decoration: none; }
.category-chip span { color: var(--muted); margin-left: .25rem; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.guide-card { min-width: 0; padding: 1.45rem; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 3px 12px rgba(22,45,38,.035); }
.guide-card[hidden] { display: none; }
.guide-card h3 { margin: .45rem 0 .5rem; font-size: 1.22rem; line-height: 1.35; }
.guide-card h3 a { color: var(--ink); text-decoration: none; }
.guide-card h3 a:hover { color: var(--brand); }
.guide-card p { margin: 0; color: var(--muted); font-size: .94rem; }
.search-status, .no-results { color: var(--muted); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: 1rem; color: var(--muted); font-size: .85rem; }
.breadcrumbs a { color: var(--muted); }
.guide-article { padding: clamp(1.2rem, 4vw, 3.4rem); background: var(--paper); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
.article-header h1 { margin: .4rem 0 1rem; font-size: clamp(2.1rem, 6vw, 3.7rem); line-height: 1.08; letter-spacing: -.05em; }
.intro-text { margin: 0; color: #41535c; font-size: 1.13rem; }
.article-dates { color: var(--muted); font-size: .82rem; }
.guide-article h2 { margin-top: 2.8rem; font-size: 1.55rem; line-height: 1.25; letter-spacing: -.025em; }
.steps-content h3 { margin: 2rem 0 .55rem; scroll-margin-top: 90px; font-size: 1.16rem; }
.steps-content p { margin-top: 0; }
.source-note { padding: .9rem 1rem; background: #f4f8f6; border-left: 3px solid var(--brand); color: var(--muted); font-size: .9rem; }
.toc { margin: 1.6rem 0; padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: 12px; background: #fbfdfc; }
.toc ol { margin: .45rem 0 0; padding-left: 1.3rem; columns: 2; }
.toc li { break-inside: avoid; margin: .22rem 0; }
.materials-box { margin: 2rem 0; padding: 1rem 1.25rem 1.15rem; background: var(--accent); border: 1px solid #c5e8d8; border-radius: 14px; }
.materials-box h2 { margin: 0 0 .65rem; font-size: 1.2rem; }
.materials-box ul { margin: 0; padding-left: 1.25rem; }
.ad-slot { min-height: 90px; margin: 2.3rem 0; padding: .5rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: center; }
.ad-label { display: block; margin-bottom: .4rem; color: #8b999f; font-size: .67rem; letter-spacing: .1em; text-transform: uppercase; }
.faq-section { margin-top: 3rem; padding-top: .1rem; }
.section-intro { color: var(--muted); }
.faq-item { border-top: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item summary { position: relative; padding: 1rem 2.2rem 1rem 0; cursor: pointer; color: var(--ink); font-weight: 750; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: .35rem; top: .85rem; color: var(--brand); font-size: 1.35rem; font-weight: 500; }
.faq-item[open] summary::after { content: "–"; }
.faq-answer { padding: 0 2.2rem .95rem 0; color: #42555e; }
.faq-answer p { margin: 0; }
.related-section { margin-top: 3rem; padding: 1rem 1.2rem; background: var(--warm); border: 1px solid #f0e3bc; border-radius: 14px; }
.related-section h2 { margin-top: 0; font-size: 1.2rem; }
.related-list { margin-bottom: 0; padding-left: 1.2rem; }
.category-page { min-height: 65vh; }
.category-header { margin: 2.5rem 0; max-width: 800px; }
.category-header h1 { font-size: clamp(2.4rem, 6vw, 4rem); }
.category-header p { color: var(--muted); font-size: 1.1rem; }
.site-footer { padding: 2.5rem max(1rem, calc((100% - 1120px)/2)); display: grid; gap: .8rem; background: #102b26; color: #dce8e4; }
.site-footer nav a { color: #dce8e4; }
.site-footer small { color: #abc1ba; }
.legal-page { max-width: 800px; min-height: 65vh; }
.legal-card { padding: clamp(1.2rem, 4vw, 3rem); background: var(--paper); border: 1px solid var(--line); border-radius: 18px; }
.legal-card h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -.04em; }
.contact-form { display: grid; gap: .8rem; }
.contact-form label { font-weight: 700; }
.contact-form input, .contact-form textarea { width: 100%; padding: .75rem; border: 1px solid #bdccc5; border-radius: 8px; font: inherit; }
.contact-form button { width: fit-content; padding: .75rem 1.1rem; border: 0; border-radius: 8px; background: var(--brand); color: white; font: inherit; font-weight: 750; cursor: pointer; }
@media (max-width: 680px) {
  .header-inner { min-height: 62px; }
  .header-inner nav { gap: .7rem; }
  .header-inner nav a { font-size: .82rem; }
  .hero { padding: 4rem 1rem 3.5rem; }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-article { border-radius: 14px; }
  .toc ol { columns: 1; }
}