:root {
  --ink: #102a43;
  --muted: #52667a;
  --brand: #006f73;
  --brand-dark: #064f52;
  --pale: #eaf7f5;
  --sky: #eef5fb;
  --paper: #ffffff;
  --page: #f6f9fb;
  --line: #d8e2ea;
  --accent: #f0b429;
  --danger: #a63c26;
  --radius: 16px;
  --shadow: 0 14px 38px rgba(16, 42, 67, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", system-ui, sans-serif; font-size: 16px; line-height: 1.75; }
a { color: var(--brand-dark); text-underline-offset: .18em; }
button, select, input { font: inherit; }
.wrap { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.skip { position: fixed; left: .5rem; top: .5rem; z-index: 100; padding: .6rem 1rem; background: var(--ink); color: #fff; transform: translateY(-180%); }
.skip:focus { transform: translateY(0); }
.pr-bar { padding: .42rem 0; background: var(--ink); color: #fff; font-size: .82rem; }
.pr-bar strong { color: var(--accent); }
.site-head { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.95); }
.head-row { display: flex; min-height: 68px; align-items: center; justify-content: space-between; gap: 1.25rem; }
.logo { display: flex; align-items: baseline; gap: .45rem; color: var(--ink); font-size: 1.22rem; font-weight: 900; text-decoration: none; letter-spacing: -.03em; }
.logo small { color: var(--brand); font-size: .72rem; letter-spacing: .04em; }
.nav { display: flex; align-items: center; gap: 1.1rem; font-size: .9rem; font-weight: 700; }
.nav a { color: var(--ink); text-decoration: none; }
.nav .primary { padding: .5rem .8rem; border-radius: 999px; background: var(--brand); color: #fff; }
.breadcrumb { padding-top: 1rem; color: var(--muted); font-size: .8rem; }
.breadcrumb a { color: inherit; }
.tool-intro { display: grid; grid-template-columns: .72fr 1.28fr; gap: 2rem; padding: 1.6rem 0 1.3rem; align-items: end; }
.eyebrow { margin: 0 0 .35rem; color: var(--brand); font-size: .76rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.3; letter-spacing: -.035em; }
h1 { margin: 0; font-size: clamp(2rem, 4vw, 3.45rem); }
h2 { margin: 0 0 .9rem; font-size: clamp(1.6rem, 3vw, 2.35rem); }
h3 { margin: 0 0 .45rem; font-size: 1.16rem; }
.lead { margin: 0; color: var(--muted); font-size: 1.04rem; }
.meta { color: var(--muted); font-size: .82rem; }
.diagnostic { display: grid; grid-template-columns: .95fr 1.05fr; gap: 1rem; padding-bottom: 4rem; }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); }
.form-panel, .result-panel { padding: clamp(1.15rem, 3vw, 1.8rem); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { margin: 0; }
.field.full { grid-column: 1 / -1; }
.field label, .field legend { display: block; margin-bottom: .35rem; font-weight: 800; }
select { width: 100%; min-height: 46px; padding: .65rem .7rem; border: 1px solid #9fb1bf; border-radius: 10px; background: #fff; color: var(--ink); }
.checks { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
.check { display: flex; align-items: flex-start; gap: .5rem; padding: .62rem; border: 1px solid var(--line); border-radius: 10px; background: var(--page); cursor: pointer; }
.check input { width: 1.05rem; height: 1.05rem; margin-top: .2rem; accent-color: var(--brand); }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: .65rem 1rem; border: 1px solid var(--brand); border-radius: 999px; background: var(--brand); color: #fff; font-weight: 800; text-decoration: none; cursor: pointer; }
.button:hover { background: var(--brand-dark); }
.result-panel { background: var(--ink); color: #fff; }
.result-panel .eyebrow { color: #66d9d0; }
.result-card { margin-top: .85rem; padding: 1rem; border: 1px solid rgba(255,255,255,.22); border-radius: 12px; background: rgba(255,255,255,.07); }
.result-top { display: flex; justify-content: space-between; gap: 1rem; color: #d8f3ef; font-size: .78rem; font-weight: 900; }
.result-card h3 { margin-top: .3rem; }
.result-card p { margin: .35rem 0; color: #d9e4ec; font-size: .88rem; }
.result-card a { color: #fff; font-weight: 800; }
.fine { color: #c0cfda; font-size: .74rem; }
.section { padding: clamp(3.5rem, 7vw, 6rem) 0; }
.section.white { background: var(--paper); }
.section-head { display: grid; grid-template-columns: .68fr 1.32fr; gap: 2rem; margin-bottom: 1.8rem; }
.section-head p { margin: .2rem 0 0; color: var(--muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table { width: 100%; min-width: 860px; border-collapse: collapse; }
th, td { padding: .9rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--sky); font-size: .78rem; }
td { font-size: .88rem; }
tbody tr:last-child td { border-bottom: 0; }
.tag { display: inline-block; margin: .1rem .15rem .1rem 0; padding: .16rem .42rem; border-radius: 999px; background: var(--pale); color: var(--brand-dark); font-size: .7rem; font-weight: 800; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: .9rem; }
.card { display: flex; flex-direction: column; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.card p { color: var(--muted); }
.card a { margin-top: auto; font-weight: 800; }
.callout { padding: 1.2rem; border-left: 5px solid var(--accent); border-radius: 0 12px 12px 0; background: #fff8df; }
.article-grid { display: grid; grid-template-columns: minmax(0, 760px) 230px; gap: 3rem; padding: 3.2rem 0 5rem; align-items: start; }
.article h1 { max-width: 18ch; }
.article h2 { margin-top: 3rem; font-size: 1.75rem; }
.article h3 { margin-top: 1.8rem; }
.toc { position: sticky; top: 1.5rem; padding: 1rem; border: 1px solid var(--line); border-radius: 12px; background: #fff; font-size: .84rem; }
.toc b, .toc a { display: block; }
.toc a { padding: .25rem 0; text-decoration: none; }
.source-list { display: grid; gap: .65rem; padding: 0; list-style: none; }
.source-list li { display: grid; grid-template-columns: 10rem 1fr auto; gap: 1rem; padding: .85rem; border: 1px solid var(--line); border-radius: 11px; background: #fff; align-items: center; }
.source-list span { color: var(--muted); font-size: .82rem; }
.foot { padding: 2.5rem 0; border-top: 1px solid var(--line); background: #eaf0f4; }
.foot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.foot-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .6rem 1rem; font-size: .82rem; }
.foot-note { color: var(--muted); font-size: .78rem; }
code { padding: .1em .3em; border-radius: 4px; background: #eaf0f4; }

@media (max-width: 820px) {
  .tool-intro, .diagnostic, .section-head, .article-grid, .foot-grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; }
  .foot-links { justify-content: flex-start; }
}
@media (max-width: 560px) {
  .wrap { width: min(100% - 1.2rem, 1120px); }
  .nav a:not(.primary) { display: none; }
  .form-grid, .checks { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .source-list li { grid-template-columns: 1fr; gap: .2rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }