:root {
  --color-bg: #faf8f3;
  --color-paper: #f7f2e8;
  --color-ink: #203632;
  --color-muted: #3e5550;
  --color-line: #e4ddd2;
  --color-field: #8a847b;
  --color-stroke: #3a3631;
  --color-accent: #a84d22;
  --color-accent-hover: #8f401c;
  --color-tint: #faebdd;
  --color-black: #242424;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 120px;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-en: "Cormorant Garamond", Palatino, serif;
  --max: 1120px;
  --read: 720px;
  --header: 64px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.03em;
}
body.has-dock { padding-bottom: 72px; }
img, svg { display: block; max-width: 100%; }
a { color: var(--color-accent); text-underline-offset: 3px; }
a:hover { color: var(--color-accent-hover); }
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: var(--space-2);
  top: -48px;
  background: var(--color-black);
  color: #fff;
  padding: 8px 12px;
  z-index: 50;
  text-decoration: none;
}
.skip:focus { top: 8px; }

.wrap {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding-inline: 20px;
}
.read { max-width: var(--read); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header);
  background: rgba(250, 248, 243, 0.94);
  border-bottom: 1px solid var(--color-line);
}
.site-header .wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.logo {
  color: var(--color-ink);
  text-decoration: none;
  min-width: 0;
}
.logo b {
  display: block;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0.06em;
  line-height: 1.3;
}
.logo span {
  display: block;
  color: var(--color-muted);
  font-size: 14px;
  letter-spacing: 0.08em;
  line-height: 1.4;
}
.nav-toggle { display: none; }
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.nav a {
  color: var(--color-ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.nav a[aria-current="page"] { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.nav a:hover { color: var(--color-accent); }

.label {
  display: block;
  margin: 0 0 var(--space-2);
  color: var(--color-muted);
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
}
h1, h2, h3, p, li {
  overflow-wrap: anywhere;
  line-break: strict;
}
h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.06em;
  max-width: 100%;
}
h1 {
  margin: 0;
  font-size: clamp(30px, 4.2vw + 14px, 60px);
  line-height: 1.4;
}
h2 {
  margin: 0 0 var(--space-3);
  font-size: clamp(24px, 2vw + 17px, 40px);
  line-height: 1.5;
}
h3 {
  margin: 0 0 var(--space-1);
  font-size: 22px;
  line-height: 1.5;
}
.en {
  display: block;
  margin-top: 4px;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-weight: 400;
  letter-spacing: 0.02em;
}
h1 .en { font-size: 14px; line-height: 1.7; }
h2 .en, h3 .en { font-size: 14px; line-height: 1.7; font-family: var(--font-sans); letter-spacing: 0.02em; text-transform: none; }
.lead {
  margin: var(--space-3) 0 0;
  max-width: var(--read);
  font-size: 16px;
}
.note {
  margin: var(--space-2) 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
}

.hero {
  padding: var(--space-7) 0 var(--space-6);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(240px, 0.85fr);
  gap: var(--space-6);
  align-items: end;
}
.hero-grid > *,
.split > *,
.row > *,
.other > *,
.stack > * { min-width: 0; }
.checks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: var(--space-5) 0 0;
  padding: 0;
  list-style: none;
}
.checks li {
  padding: 0 var(--space-3) 0 0;
}
.checks li + li {
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-line);
}
.checks strong {
  display: block;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.checks span {
  display: block;
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
}
.btn {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  min-height: 48px;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn .en {
  margin-top: 0;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary .en { color: #fff; }
.btn-primary:hover { background: var(--color-accent-hover); color: #fff; }
.btn-line {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-line .en { color: var(--color-accent); }
.btn-line:hover { background: var(--color-tint); color: var(--color-accent-hover); }

.figure {
  margin: 0;
  min-height: 280px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
}
.figure svg { width: min(100%, 420px); height: auto; }

.section { padding: var(--space-7) 0; }
.section + .section { border-top: 1px solid var(--color-line); }
.section-head { margin-bottom: var(--space-5); }

.stack { display: grid; gap: var(--space-4); }
.row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-line);
}
.row h3 { font-size: 20px; }
.kicker {
  margin: 0;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
}
th, td {
  padding: 14px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-line);
  font-weight: 400;
}
th {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
}
.gap-top { margin-top: var(--space-5); }
.gap-s { margin-top: var(--space-4); }
.other {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-4);
}
.panel {
  background: var(--color-paper);
  border-radius: 10px;
  padding: var(--space-3);
}
.panel h3 { font-size: 20px; }
.panel p { margin: 0; }

ol.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
ol.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-line);
}
ol.steps li::before {
  content: counter(step, decimal-leading-zero);
  color: var(--color-accent);
  font-family: var(--font-en);
  font-size: 20px;
  line-height: 1.4;
}
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}

.site-footer {
  padding: var(--space-6) 0 var(--space-5);
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
}
.site-footer a { font-weight: 500; }
.foot-name {
  margin: 0 0 var(--space-1);
  color: var(--color-ink);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.06em;
}
.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: var(--space-3) 0;
  padding: 0;
  list-style: none;
}
.foot-links a { color: var(--color-ink); }

.dock {
  display: none;
}

.sup { color: var(--color-muted); font-size: 14px; line-height: 1.7; }

@media (max-width: 768px) {
  .hero { padding: 56px 0 48px; }
  .hero-grid, .split, .other, .row, .checks {
    grid-template-columns: minmax(0, 1fr);
  }
  .checks li,
  .checks li + li {
    padding: var(--space-2) 0;
    border-left: 0;
    border-top: 1px solid var(--color-line);
  }
  .checks li:first-child { border-top: 0; padding-top: 0; }
  .figure { min-height: 0; justify-content: flex-start; margin-top: var(--space-4); }
  .figure svg { width: min(100%, 280px); }
  .section { padding: 64px 0; }
  .nav-toggle {
    display: block;
  }
  .nav-toggle summary {
    list-style: none;
    cursor: pointer;
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    border: 1px solid var(--color-accent);
    border-radius: 6px;
    color: var(--color-accent);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.08em;
  }
  .nav-toggle summary::-webkit-details-marker { display: none; }
  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 16px;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
  }
  .nav-toggle[open] .nav { display: flex; }
  .nav a { padding: 12px 0; border-top: 1px solid var(--color-line); }
  .actions { align-items: stretch; }
  .actions .btn { width: 100%; }
  .dock {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    padding: 0;
    background: var(--color-bg);
    border-top: 1px solid var(--color-line);
  }
  .dock a {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 56px;
    margin: 0;
    border-radius: 0;
    border: 0;
  }
  table, thead, tbody, tr, th, td { display: block; }
  thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
  td { border-bottom: 0; padding: 4px 0; }
  tr {
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-line);
  }
  td::before {
    content: attr(data-label);
    display: block;
    color: var(--color-muted);
    font-size: 14px;
    font-weight: 500;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

/* ==== TARNAR トークン第2版レイヤー（2026-10-10 Claude適用。S00 tokens.css 第2段に合わせる） ==== */
:root {
  --read: 672px; --measure: 672px; --read-max: 672px;
  --color-paper: #f4efe6; --color-surface: #f4efe6; --color-cream: #f4efe6;
  --color-stroke: #203632;
  --radius-btn: 0; --radius-card: 0;
}
html body h1 { font-size: clamp(26px, 7vw, 46px); line-height: 1.35; letter-spacing: 0.02em; }
html body h2 { font-size: clamp(26px, 5vw, 36px); line-height: 1.35; }
html body h3 { font-size: 22px; }
.section { padding-top: 42px; padding-bottom: 42px; }
@media (min-width: 800px) { .section { padding-top: 64px; padding-bottom: 64px; } }
html body *:not(img):not(video):not(iframe) { border-radius: 0 !important; }
html body img { border-radius: 2px; }
/* 線画：色と太さ（表示px）。記事本文の中の図は対象外 */
svg:not(.entry-body svg) [stroke="#3A3631" i] { stroke: #203632; }
svg:not(.entry-body svg) [fill="#FCFBF7" i] { fill: #faf8f3; }
svg:not(.entry-body svg) [fill="#F7F2E8" i] { fill: #f4efe6; }
svg:not(.entry-body svg) :is(:is(path, line, circle, ellipse, polyline, polygon, rect)[stroke]:not([stroke="none"]), g[stroke]:not([stroke="none"]) :is(path, line, circle, ellipse, polyline, polygon, rect)) { vector-effect: non-scaling-stroke; stroke-width: 2px; }
.figure svg :is(:is(path, line, circle, ellipse, polyline, polygon, rect)[stroke]:not([stroke="none"]), g[stroke]:not([stroke="none"]) :is(path, line, circle, ellipse, polyline, polygon, rect)) { stroke-width: 3px; }
@media (min-width: 800px) { .figure svg :is(:is(path, line, circle, ellipse, polyline, polygon, rect)[stroke]:not([stroke="none"]), g[stroke]:not([stroke="none"]) :is(path, line, circle, ellipse, polyline, polygon, rect)) { stroke-width: 4px; } }
/* ==== /TARNAR トークン第2版レイヤー ==== */