:root {
  color-scheme: light dark;
  --forest: #123d2d;
  --hero: #0d2c18;
  --accent: #c67743;
  --accent-ink: #91502a;
  --paper: #f4f1e8;
  --surface: #fffefa;
  --surface-muted: #ece9de;
  --border: #ddd9cb;
  --text: #1c2922;
  --muted: #59645c;
  --link: #123d2d;
  --danger: #a6443a;
  --danger-soft: #f6dfdc;
  --success: #397157;
  --success-soft: #e4eee3;
  --hero-text: #f4f1e8;
  --hero-muted: #c3d0c1;
  --hero-border: #36503a;
  --hero-accent: #edb382;
  --radius: 16px;
  --icon-radius: 22%;
  --content-width: 1140px;
  --reading-width: 760px;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --shadow: 0 14px 40px rgb(9 41 31 / 6%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 2rem; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Avenir Next", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); overflow-wrap: anywhere; text-underline-offset: 0.25em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
::selection { color: var(--hero-text); background: var(--forest); }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, h4 { line-height: 1.2; overflow-wrap: anywhere; }
h1, .landing-content h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.045em; }
h1 { margin: 0; color: var(--hero-text); font-size: clamp(2.75rem, 5.7vw, 5.25rem); }
em { font-weight: inherit; }
p { margin: 0.85rem 0; }
p:first-child { margin-top: 0; }
p:last-child { margin-bottom: 0; }
ul { margin: 0.75rem 0; padding-left: 1.25rem; }
li + li { margin-top: 0.5rem; }
.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  transform: translateY(-180%);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0.65rem 1rem;
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }
.hero { position: relative; background: var(--hero); color: var(--hero-text); }
.hero-inner, .content, .footer-inner {
  width: min(calc(100% - 3rem), var(--content-width));
  margin: 0 auto;
}
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 1.75rem 0; border-bottom: 1px solid var(--hero-border); }
.brand { display: inline-flex; align-items: center; gap: 0.85rem; color: inherit; text-decoration: none; }
.brand-logo { width: 3.75rem; height: 3.75rem; flex: 0 0 auto; object-fit: cover; border-radius: var(--icon-radius); }
.brand-name { max-width: 15rem; font-size: 1.05rem; font-weight: 650; line-height: 1.35; letter-spacing: -0.02em; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.3rem 1.75rem; }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--hero-muted); font-size: 0.9rem; text-decoration: none; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--hero-text); border-bottom-color: var(--hero-accent); }
.eyebrow { margin: 0 0 1.3rem; color: var(--accent-ink); font-size: 0.7rem; font-weight: 700; line-height: 1.6; text-transform: uppercase; letter-spacing: 0.19em; }
.hero .eyebrow { color: var(--hero-accent); }
.hero-intro { max-width: 35rem; color: var(--hero-muted); font-size: 1.08rem; line-height: 1.7; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 3rem; align-items: center; padding: 5rem 0 3.75rem; }
.hero-copy h1 em { color: var(--hero-accent); }
.hero-copy .hero-intro { margin: 1.75rem 0 0; max-width: 28rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.6rem; margin-top: 2rem; }
.button, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  min-height: 44px;
  max-width: 100%;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--forest);
  color: #fff;
  padding: 0.85rem 1.25rem;
  font-weight: 650;
  text-decoration: none;
  line-height: 1.5;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.button:hover, button:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.button-accent { background: var(--hero-accent); color: var(--hero); }
.hero-link { display: inline-flex; align-items: center; min-height: 44px; gap: 0.75rem; color: var(--hero-text); font-size: 0.9rem; }
.platform-note { display: flex; align-items: center; gap: 0.55rem; color: var(--hero-muted); font-size: 0.78rem; margin-top: 1.5rem; }
.availability-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--hero-accent); }
.hero-map { margin: 0; min-width: 0; transform: rotate(2deg); }
.map-frame { position: relative; overflow: hidden; border-radius: 24px; background: #e8eadc; box-shadow: 0 24px 70px rgb(0 0 0 / 18%); }
.map-frame img { width: 100%; height: auto; }
.map-caption { position: absolute; top: 1.2rem; left: 1.2rem; right: 1.2rem; display: flex; align-items: center; gap: 0.6rem; padding: 0.8rem 1rem; border: 1px solid #d7dece; border-radius: 10px; background: #fffefa; color: #123d2d; font-size: 0.84rem; font-weight: 650; }
.map-caption > span:last-child { margin-left: auto; }
.map-caption-dot { width: 8px; height: 8px; border-radius: 50%; background: #397157; }
.map-key { position: absolute; bottom: 1.1rem; left: 1.2rem; right: 1.2rem; display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 0.5rem; color: #123d2d; font-size: 0.68rem; background: #fffefa; border-radius: 8px; padding: 0.55rem; }
.map-key-line { width: 20px; border-top: 2px dashed #c67743; }
.map-key-point { width: 7px; height: 7px; margin-left: 0.65rem; border-radius: 50%; background: #123d2d; }
.hero-map figcaption { margin-top: 1rem; color: var(--hero-muted); font-size: 0.68rem; text-align: right; letter-spacing: 0.05em; }
.hero-index { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--hero-border); }
.hero-index a { display: flex; align-items: center; gap: 1rem; min-height: 44px; padding: 1.25rem 0; color: var(--hero-text); text-decoration: none; font-size: 0.84rem; }
.hero-index a + a { border-left: 1px solid var(--hero-border); padding-left: 2rem; }
.hero-index a > span:first-child { color: var(--hero-accent); font-size: 0.68rem; }
.hero-index a > span:last-child { margin-left: auto; margin-right: 1.5rem; color: var(--hero-muted); }
.hero-index a:hover { color: var(--hero-accent); }
.content { padding: 3rem 0 5rem; }
.landing-content { padding-top: 5rem; padding-bottom: 4rem; }
.landing-content section { padding: 0; }
.landing-content section + section { border-top: 0; }
.landing-content h2 { margin: 0; font-size: clamp(2.25rem, 4.2vw, 3.5rem); }
.landing-content h2 em { color: var(--accent-ink); }
.intro-section { margin-bottom: 2.75rem; }
.section-intro { display: grid; grid-template-columns: 1fr 1.05fr; gap: 4rem; align-items: center; }
.section-intro p { margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.landing-content .feature-card { padding: 2rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); transition: border-color 180ms ease, transform 180ms ease; }
.feature-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.feature-top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 2rem; }
.feature-icon { width: 32px; height: 32px; color: var(--forest); }
.feature-number { color: var(--muted); font-size: 0.65rem; letter-spacing: 0.12em; }
.feature-card h3 { margin: 0 0 1rem; font-family: var(--serif); font-weight: 400; font-size: 1.75rem; letter-spacing: -0.025em; }
.feature-card p { color: var(--muted); font-size: 0.94rem; }
.landing-content .sharing-section { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 4rem; align-items: center; margin-top: 3rem; padding: 3.25rem; border-radius: 24px; background: var(--forest); color: var(--hero-text); }
.sharing-section h2 em, .sharing-section .eyebrow { color: var(--hero-accent); }
.sharing-section p:not(.eyebrow) { color: var(--hero-muted); font-size: 0.94rem; }
.sharing-section h2 { margin-bottom: 1.5rem; }
.sharing-symbol { color: var(--hero-accent); }
.sharing-symbol svg { width: 100%; max-width: 250px; margin: auto; }
.sharing-symbol circle:not([stroke]) { fill: var(--hero-accent); }
.text-link { display: inline-flex; align-items: center; min-height: 44px; gap: 1.5rem; font-weight: 650; font-size: 0.9rem; }
.sharing-section .text-link { color: var(--hero-text); }
.landing-content .offline-section { display: grid; grid-template-columns: 1fr 1.05fr; gap: 4rem; margin: 4rem 0; padding: 1rem 0; }
.offline-copy { color: var(--muted); }
.offline-note { display: flex; align-items: flex-start; gap: 0.7rem; margin-top: 1.5rem; color: var(--text); font-size: 0.85rem; font-weight: 600; }
.landing-content .feedback-section { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 2.75rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-muted); }
.feedback-section h2 { font-size: clamp(1.85rem, 3vw, 2.7rem); }
.feedback-section p:not(.eyebrow) { color: var(--muted); font-size: 0.94rem; }
.feedback-section .button { flex-shrink: 0; }
.document-hero { max-width: 52rem; padding: 3.5rem 0 4rem; }
.document-hero h1 { font-size: clamp(2.2rem, 5.1vw, 4.4rem); hyphens: auto; }
.document-hero .hero-intro { margin-top: 1.5rem; }
.document-layout, .support-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 2.5rem; align-items: start; }
.document-nav { position: sticky; top: 2rem; max-height: calc(100svh - 4rem); overflow-y: auto; scrollbar-width: thin; }
.toc { display: grid; gap: 0.1rem; }
.toc-links { margin: 0; padding: 0; list-style: none; }
.toc-links li + li { margin-top: 0; }
.toc a { display: flex; align-items: center; min-height: 44px; padding: 0.5rem 0.75rem; border-left: 1px solid var(--border); color: var(--muted); text-decoration: none; font-size: 0.81rem; line-height: 1.5; }
.toc a:hover { border-left-color: var(--accent); color: var(--link); background: var(--surface-muted); }
.toc-mobile { display: none; }
article, .status-card, .notice { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
article { min-width: 0; }
.status-card, .notice { margin-bottom: 2rem; padding: 1.25rem 1.5rem; background: var(--surface-muted); }
.status-card { display: flex; align-items: flex-start; gap: 0.9rem; }
.status-dot { width: 0.6rem; height: 0.6rem; flex: 0 0 auto; margin-top: 0.5rem; border-radius: 50%; background: var(--success); }
.status-card p, .notice p { margin: 0; font-size: 0.9rem; }
.notice ul { margin-bottom: 0; }
.notice.error { border-color: var(--danger); background: var(--danger-soft); }
.notice.success { border-color: var(--success); background: var(--success-soft); }
.article-heading { padding: 2rem; border-bottom: 1px solid var(--border); border-radius: var(--radius) var(--radius) 0 0; background: var(--surface-muted); }
.article-heading h2 { margin: 0; font-family: var(--serif); font-size: 1.9rem; font-weight: 400; letter-spacing: -0.03em; }
.article-heading p { margin: 0.85rem 0 0; color: var(--muted); font-size: 0.94rem; }
article section, form { padding: 2rem; }
article section + section { border-top: 1px solid var(--border); }
article h3 { margin: 0 0 1.2rem; font-size: 1.12rem; line-height: 1.4; }
article h4 { font-size: 1rem; line-height: 1.5; }
article section { font-size: 0.94rem; line-height: 1.8; }
code { overflow-wrap: anywhere; background: var(--surface-muted); padding: 0.12rem 0.32rem; border-radius: 4px; font-size: 0.88em; }
.contact-card { border-left: 3px solid var(--accent); background: var(--surface-muted); padding: 1.25rem; border-radius: 0 8px 8px 0; }
.support-layout { grid-template-columns: minmax(0, 760px) minmax(220px, 1fr); }
.support-aside { padding: 1.5rem 0; font-size: 0.9rem; }
.support-aside h2, .support-aside h3 { font-family: var(--serif); font-size: 1.7rem; font-weight: 400; }
.support-aside p { color: var(--muted); }
.support-aside a { display: inline-flex; align-items: center; min-height: 44px; }
.contact-link { font-size: 0.84rem; }
.support-tip { margin: 1.75rem 0 1rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.support-tip h3 { font-family: inherit; font-size: 0.94rem; font-weight: 650; }
.field { margin-bottom: 1.4rem; }
label { display: block; margin-bottom: 0.5rem; font-size: 0.94rem; font-weight: 650; }
.hint { margin: 0.45rem 0 0; color: var(--muted); font-size: 0.84rem; line-height: 1.65; }
input, select, textarea { width: 100%; min-height: 44px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); padding: 0.75rem 0.85rem; }
textarea { min-height: 12rem; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.captcha-box { border: 1px solid var(--border); border-radius: 8px; background: var(--surface-muted); padding: 1.25rem; }
.captcha-question { margin: 0 0 0.75rem; font-size: 0.94rem; font-weight: 650; }
.hidden-field { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.78rem; }
.footer-inner { display: flex; align-items: center; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 2rem; padding: 2rem 0; }
.footer-brand { color: var(--text); text-decoration: none; font-family: var(--serif); font-size: 1.35rem; }
.footer nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.footer nav a { display: inline-flex; align-items: center; min-height: 44px; }
.footer p { flex-basis: 100%; margin: 0; font-size: 0.73rem; }

@media (max-width: 1000px) {
  .hero-grid { gap: 2rem; padding-top: 3.5rem; }
  .hero-copy h1 { font-size: clamp(2.75rem, 5.7vw, 4.3rem); }
  .hero-actions { gap: 0.75rem; }
  .document-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 1.5rem; }
  .sharing-section { gap: 2rem; }
}
@media (max-width: 899px) {
  .document-layout, .support-layout { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .document-nav { position: static; max-height: none; overflow: visible; }
  .document-nav > .eyebrow, .toc-desktop { display: none; }
  .toc-mobile { display: block; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
  .toc-mobile summary { min-height: 44px; padding: 1rem 1.25rem; cursor: pointer; font-weight: 650; font-size: 0.9rem; }
  .toc-mobile .toc { padding: 0 1.25rem 1rem; }
  .support-aside { padding: 1rem 0; }
}
@media (max-width: 699px) {
  .hero-inner, .content, .footer-inner { width: min(calc(100% - 2.5rem), var(--content-width)); }
  .site-header { align-items: flex-start; flex-direction: column; gap: 1rem; padding: 1.25rem 0 0.5rem; }
  .brand-name { font-size: 1rem; }
  .site-nav { width: 100%; justify-content: space-between; gap: 0.5rem; }
  .site-nav a { font-size: 0.83rem; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; padding: 2.5rem 0; }
  .hero-copy h1 { font-size: clamp(2.6rem, 10.9vw, 4.3rem); }
  .hero-intro { font-size: 1rem; }
  .hero-copy .hero-intro { margin-top: 1.25rem; }
  .hero-map { transform: rotate(0); max-width: 480px; width: 100%; margin: 0 auto; }
  .map-frame { border-radius: 16px; }
  .map-caption { top: 0.8rem; left: 0.8rem; right: 0.8rem; padding: 0.65rem; font-size: 0.77rem; }
  .map-key { bottom: 0.8rem; left: 0.8rem; right: 0.8rem; }
  .hero-index a { flex-wrap: wrap; gap: 0.25rem; font-size: 0.75rem; align-content: center; }
  .hero-index a + a { padding-left: 0.75rem; }
  .hero-index a > span:first-child { width: 100%; }
  .hero-index a > span:last-child { display: none; }
  .landing-content { padding-top: 3rem; }
  .section-intro, .landing-content .sharing-section, .landing-content .offline-section { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .section-intro { gap: 1.5rem; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .landing-content .feature-card { padding: 1.5rem; }
  .feature-top { margin-bottom: 1.5rem; }
  .landing-content .sharing-section { padding: 2rem 1.5rem; margin-top: 2rem; }
  .sharing-symbol svg { max-width: 140px; margin: 0; }
  .landing-content .offline-section { margin: 3rem 0; }
  .landing-content .feedback-section { align-items: flex-start; flex-direction: column; padding: 2rem 1.5rem; }
  .document-hero { padding: 2.5rem 0; }
  .content { padding-bottom: 3rem; }
  .article-heading, article section, form { padding: 1.5rem; }
  .article-heading h2 { font-size: 1.65rem; }
  .status-card, .notice { padding: 1.1rem; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 0.6rem; }
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0c1510;
    --surface: #142219;
    --surface-muted: #1c2b22;
    --border: #34483b;
    --text: #f1f3ef;
    --muted: #aab6ae;
    --link: #9bc8a8;
    --forest: #123d2d;
    --accent: #f0a56f;
    --accent-ink: #edb382;
    --danger: #ff9f96;
    --danger-soft: #442522;
    --success: #83cea3;
    --success-soft: #20382a;
    --shadow: 0 14px 40px rgb(0 0 0 / 10%);
  }
  .feature-icon { color: var(--link); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}
@media print {
  :root {
    --paper: #fff;
    --surface: #fff;
    --surface-muted: #fff;
    --border: #999;
    --text: #000;
    --muted: #000;
    --link: #000;
    --accent-ink: #000;
    --hero-text: #000;
    --hero-muted: #000;
    --hero-accent: #000;
  }
  body { background: #fff; color: #000; font-family: Arial, sans-serif; }
  .skip-link, form, .site-nav, .hero-index, .hero-actions, .platform-note, .hero-map, .document-nav, .sharing-symbol, .footer nav, .feedback-section .button { display: none; }
  .hero { background: #fff; color: #000; }
  .hero-inner, .content, .footer-inner { width: 100%; }
  .site-header { padding: 0 0 1rem; border-color: #999; }
  .hero-grid, .section-intro, .document-layout, .support-layout, .feature-grid, .landing-content .sharing-section, .landing-content .offline-section { display: block; }
  .document-hero, .hero-grid { padding: 1rem 0; }
  .brand, h1, h2, .hero-copy h1 em, .hero .hero-intro, .eyebrow, a, .footer, .landing-content h2 em, .sharing-section p:not(.eyebrow) { color: #000; }
  .hero-copy h1 { font-size: 2.5rem; }
  article, .status-card, .article-heading, .notice, .contact-card, .landing-content .feature-card, .landing-content .sharing-section, .landing-content .feedback-section { background: #fff; border-color: #999; box-shadow: none; color: #000; }
  .landing-content .sharing-section { padding: 2rem 0; }
  .feature-card { margin-bottom: 1rem; }
  .feature-card:hover, .hero-map { transform: none; }
  article section, .feature-card { break-inside: avoid; }
  .feature-icon { color: #000; }
}