:root {
  --paper: #f4f0e8;
  --surface: #fffdf8;
  --surface-2: #edf5f2;
  --ink: #202827;
  --muted: #66736e;
  --line: #c8d0cb;
  --accent: #b64032;
  --blue: #1f596b;
  --green: #236448;
  --mark: #f3dc86;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(32, 40, 39, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(32, 40, 39, 0.03) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans", Arial, sans-serif;
  line-height: 1.75;
}

a {
  color: var(--blue);
  font-weight: 800;
}

.guide-shell {
  width: min(1080px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.guide-nav,
.guide-card,
.source-panel,
.faq-block,
.cta-panel {
  border: 2px solid var(--ink);
  background: var(--surface);
  box-shadow: 5px 5px 0 var(--ink);
}

.guide-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
  font-size: 14px;
}

.brand-link {
  color: var(--ink);
  font-size: 18px;
  text-decoration: none;
}

.language-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.language-links a {
  border: 1px solid var(--line);
  padding: 3px 8px;
  background: var(--surface-2);
  color: var(--ink);
  text-decoration: none;
}

.language-links a[aria-current="page"] {
  background: var(--blue);
  color: #fff;
}

.hero {
  padding: 54px 0 30px;
  border-bottom: 2px solid var(--ink);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 900px;
  margin-bottom: 18px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif", serif;
  font-size: 68px;
  line-height: 1.05;
  overflow-wrap: anywhere;
}

.lede {
  max-width: 860px;
  color: var(--muted);
  font-size: 19px;
  font-weight: 800;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.meta-pill {
  border: 1px solid var(--ink);
  background: var(--surface-2);
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 900;
}

.guide-grid {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  align-items: start;
  gap: 32px;
  margin-top: 28px;
  min-width: 0;
}

.toc {
  position: sticky;
  top: 16px;
  border-left: 4px solid var(--blue);
  background: rgba(255, 253, 248, 0.82);
  padding: 12px 14px;
}

.toc strong {
  display: block;
  margin-bottom: 8px;
}

.toc a {
  display: block;
  margin: 7px 0;
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
}

.guide-content {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.guide-shell > .guide-content {
  max-width: 760px;
  margin: 28px auto 0;
}

.guide-card,
.source-panel,
.faq-block,
.cta-panel {
  min-width: 0;
  padding: 24px;
}

.guide-card h2,
.source-panel h2,
.faq-block h2,
.cta-panel h2 {
  margin-bottom: 12px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif", serif;
  font-size: 36px;
  line-height: 1.18;
}

.guide-card h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.guide-card ul,
.guide-card ol,
.source-panel ul {
  margin: 0;
  padding-left: 22px;
}

.guide-card li,
.source-panel li {
  margin: 8px 0;
}

.table-wrap {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  border: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-2);
}

.highlight-box {
  border-left: 5px solid var(--green);
  background: #edf7ef;
  padding: 14px 16px;
  font-weight: 800;
}

.form-list {
  margin: 16px 0;
}

.form-list dt {
  margin-top: 12px;
  color: var(--blue);
  font-weight: 900;
}

.form-list dt:first-of-type {
  margin-top: 0;
}

.form-list dd {
  margin: 4px 0 0;
  padding-left: 0;
  color: var(--ink);
  line-height: 1.75;
}

.answer-box {
  border: 2px solid var(--ink);
  background: #fff9df;
  padding: 16px;
  font-weight: 900;
}

.evidence-grid,
.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 16px 0;
}

.evidence-card,
.topic-card {
  min-width: 0;
  border: 1px solid var(--line);
  background: #fff;
  padding: 14px;
}

.evidence-card h3,
.topic-card h3 {
  margin-bottom: 6px;
  color: var(--blue);
}

.evidence-card p,
.topic-card p {
  margin-bottom: 0;
}

.note-box {
  border-left: 5px solid var(--accent);
  background: #fff3ed;
  padding: 14px 16px;
  font-weight: 800;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.related-links a {
  border: 1px solid var(--ink);
  background: var(--surface-2);
  padding: 5px 10px;
  color: var(--ink);
  text-decoration: none;
}

.source-list {
  display: grid;
  gap: 8px;
}

.source-list a {
  overflow-wrap: anywhere;
}

.faq-block details {
  border-top: 1px solid var(--line);
  padding: 12px 0;
}

.faq-block summary {
  cursor: pointer;
  font-weight: 900;
}

.cta-panel {
  background: var(--surface-2);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 2px solid var(--ink);
  background: var(--blue);
  color: #fff;
  padding: 0 16px;
  box-shadow: 4px 4px 0 var(--ink);
  text-decoration: none;
}

.secondary-button {
  background: var(--surface);
  color: var(--ink);
}

@media (max-width: 820px) {
  .guide-shell {
    width: min(100vw - 20px, 720px);
    padding-top: 10px;
  }

  .guide-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding: 34px 0 22px;
  }

  h1 {
    font-size: 34px;
    line-height: 1.1;
  }

  .guide-card h2,
  .source-panel h2,
  .faq-block h2,
  .cta-panel h2 {
    font-size: 25px;
    line-height: 1.22;
  }

  .lede {
    font-size: 16px;
  }

  .guide-grid {
    display: block;
  }

  .toc {
    position: static;
    margin: 18px 0;
  }

  .guide-card,
  .source-panel,
  .faq-block,
  .cta-panel {
    padding: 18px;
  }

  .evidence-grid,
  .topic-grid {
    grid-template-columns: 1fr;
  }
}