:root {
  --sky-blue: #7db9f3;
  --mint-green: #7ed1c3;
  --pale-teal: #a8ddd6;
  --soft-navy: #5c6fa3;
  --sky-50: #f4f9fe;
  --sky-100: #e4f0fc;
  --sky-200: #c8e1f9;
  --sky-500: #5ba0e6;
  --sky-600: #3f84cb;
  --mint-50: #f1faf8;
  --mint-100: #ddf3ee;
  --mint-500: #5bbba8;
  --mint-600: #3fa38d;
  --navy-300: #8c9cc4;
  --navy-500: #5c6fa3;
  --navy-600: #475788;
  --navy-700: #344066;
  --gray-50: #fafbfc;
  --gray-100: #f4f5f7;
  --gray-200: #e6e8eb;
  --gray-300: #cdd2d8;
  --gray-500: #79818c;
  --brand-gradient: linear-gradient(120deg, var(--sky-blue), var(--mint-green));
  --brand-gradient-soft: linear-gradient(120deg, var(--sky-100), var(--mint-100));
  --border-soft: rgba(125, 185, 243, 0.22);
  --font-display: "Zen Maru Gothic", "Quicksand", "Yu Gothic", system-ui, sans-serif;
  --font-body: "Zen Kaku Gothic New", "Quicksand", "Yu Gothic", system-ui, sans-serif;
  --font-script: "Quicksand", "Zen Maru Gothic", system-ui, sans-serif;
  --font-mono: "Cascadia Mono", "Yu Gothic UI", ui-monospace, monospace;
  --shadow-sm: 0 2px 8px rgba(92, 111, 163, 0.08);
  --shadow-md: 0 8px 28px rgba(92, 111, 163, 0.12);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --ease-soft: cubic-bezier(0.32, 0.72, 0.32, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  color: var(--navy-700);
  background: #fff;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.8;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--sky-600); }
a:hover { color: var(--mint-600); }
img { max-width: 100%; }
code, .mono, kbd {
  font-family: var(--font-mono);
  font-size: 0.88em;
}
code {
  padding: 0.1em 0.4em;
  color: var(--navy-600);
  background: var(--gray-100);
  border-radius: 6px;
}
kbd {
  display: inline-block;
  min-width: 1.8em;
  padding: 0.08em 0.45em;
  color: var(--navy-600);
  text-align: center;
  background: #fff;
  border: 1px solid var(--gray-300);
  border-bottom-width: 2px;
  border-radius: 5px;
}

.top-ribbon {
  height: 6px;
  background: var(--brand-gradient);
}

.guide-hero {
  position: relative;
  max-width: 1320px;
  min-height: 430px;
  margin: 0 auto;
  padding: 56px 56px 64px;
  overflow: hidden;
}
.guide-hero::after {
  position: absolute;
  right: 56px;
  bottom: 0;
  left: 56px;
  height: 1px;
  content: "";
  background: var(--border-soft);
}
.hero-banner {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: url("/assets/forest.webp") center / cover;
  opacity: 0.34;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 88%);
  mask-image: linear-gradient(180deg, #000, transparent 88%);
}
.guide-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 56px;
  align-items: center;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 34px;
  color: var(--gray-500);
  font-size: 12px;
  letter-spacing: 0.05em;
}
.breadcrumbs a { color: var(--navy-500); text-decoration: none; }
.breadcrumbs span[aria-hidden="true"] { color: var(--pale-teal); }
.guide-eyebrow {
  margin-bottom: 14px;
  color: var(--sky-600);
  font-family: var(--font-script);
  font-size: 13px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.guide-title {
  max-width: 850px;
  margin: 0 0 20px;
  color: var(--navy-700);
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 66px);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.18;
}
.guide-lede {
  max-width: 66ch;
  margin: 0;
  color: var(--navy-600);
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.75;
}
.guide-hero-art {
  display: grid;
  place-items: center;
}
.guide-hero-art img {
  width: 190px;
  filter: drop-shadow(0 14px 24px rgba(92, 111, 163, 0.12));
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  color: var(--navy-700);
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transition: transform 160ms var(--ease-soft), box-shadow 160ms var(--ease-soft);
}
.button.primary { color: #fff; background: var(--brand-gradient); border-color: transparent; }
.button:hover { color: var(--navy-700); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.button.primary:hover { color: #fff; }

.guide-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 64px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 56px 100px;
}
.guide-toc {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  padding: 64px 8px 20px 0;
  overflow-y: auto;
}
.toc-label {
  margin-bottom: 16px;
  color: var(--gray-500);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.guide-toc ol { padding: 0; margin: 0; list-style: none; counter-reset: guide-toc; }
.guide-toc li { margin: 3px 0; counter-increment: guide-toc; }
.guide-toc ol a {
  display: flex;
  gap: 13px;
  align-items: baseline;
  padding: 8px 12px;
  color: var(--navy-500);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  border-radius: var(--radius-sm);
}
.guide-toc ol a::before {
  flex: 0 0 auto;
  color: var(--sky-blue);
  font-family: var(--font-mono);
  font-size: 10px;
  content: counter(guide-toc, decimal-leading-zero);
}
.guide-toc ol a:hover,
.guide-toc ol a.is-active { color: var(--navy-700); background: var(--sky-50); }
.guide-toc ol a.is-active::before { color: var(--mint-500); }
.toc-back {
  display: grid;
  gap: 9px;
  margin-top: 26px;
  padding-top: 18px;
  font-size: 12px;
  border-top: 1px solid var(--border-soft);
}
.toc-back a { text-decoration: none; }

.guide-content { min-width: 0; padding-top: 64px; }
.guide-content section + section { margin-top: 96px; }
.sec-head {
  display: flex;
  gap: 22px;
  align-items: baseline;
  padding-bottom: 18px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--border-soft);
}
.sec-num {
  flex: 0 0 auto;
  color: var(--mint-500);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.sec-title {
  margin: 0 0 4px;
  color: var(--navy-700);
  font-family: var(--font-display);
  font-size: clamp(29px, 3.4vw, 39px);
  font-weight: 500;
  line-height: 1.3;
}
.sec-sub {
  margin: 0;
  color: var(--sky-600);
  font-family: var(--font-script);
  font-size: 11px;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}
.prose p, .prose li { color: var(--navy-600); }
.prose p { max-width: 72ch; margin: 0 0 1.15em; font-size: 16px; line-height: 1.9; }
.prose li { margin: 0.35em 0; line-height: 1.75; }
.prose strong { color: var(--navy-700); font-weight: 700; }
.prose a { text-decoration-thickness: 1px; text-underline-offset: 3px; }
.section-lede {
  max-width: 62ch;
  margin: 0 0 34px;
  color: var(--navy-600);
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.75;
}
.subhead {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 52px 0 16px;
  color: var(--navy-700);
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 500;
  line-height: 1.45;
}
.subhead::before {
  width: 8px;
  height: 8px;
  content: "";
  background: var(--brand-gradient);
  border-radius: 50%;
}
.minihead { margin: 30px 0 8px; color: var(--navy-700); font-size: 16px; }

.steps {
  padding: 0;
  margin: 28px 0;
  list-style: none;
  counter-reset: step;
}
.steps > li {
  position: relative;
  min-height: 54px;
  padding: 0 0 26px 60px;
  color: var(--navy-600);
  counter-increment: step;
}
.steps > li::before {
  position: absolute;
  top: -2px;
  left: 0;
  display: grid;
  width: 40px;
  height: 40px;
  color: var(--sky-600);
  font-family: var(--font-mono);
  font-size: 11px;
  content: counter(step, decimal-leading-zero);
  background: #fff;
  border: 1.5px solid var(--sky-blue);
  border-radius: 50%;
  place-items: center;
}
.steps > li::after {
  position: absolute;
  top: 40px;
  bottom: 0;
  left: 19px;
  width: 1px;
  content: "";
  background: var(--border-soft);
}
.steps > li:last-child::after { display: none; }
.steps b { display: block; margin-bottom: 3px; color: var(--navy-700); }
.steps span { display: block; font-size: 14.5px; line-height: 1.75; }

.callout {
  position: relative;
  padding: 22px 26px 22px 66px;
  margin: 26px 0;
  background: var(--sky-50);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
}
.callout::before {
  position: absolute;
  top: 22px;
  left: 24px;
  display: grid;
  width: 28px;
  height: 28px;
  color: #fff;
  font-family: var(--font-display);
  content: "i";
  background: var(--brand-gradient);
  border-radius: 50%;
  place-items: center;
}
.callout.warm { background: var(--mint-50); border-color: rgba(126, 209, 195, 0.3); }
.callout.caution { background: #fffaf0; border-color: rgba(220, 164, 69, 0.28); }
.callout.caution::before { content: "!"; background: #e6ad54; }
.callout-title { margin-bottom: 4px; color: var(--navy-700); font-weight: 700; }
.callout-body { color: var(--navy-600); font-size: 14.5px; line-height: 1.75; }
.callout-body p { margin: 0.45em 0; }

.syncroom-option {
  position: relative;
  padding: 28px 30px;
  margin: 28px 0 34px;
  overflow: hidden;
  background: linear-gradient(135deg, #f2fbff 0%, var(--mint-50) 100%);
  border: 2px solid rgba(91, 187, 168, 0.38);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.syncroom-option::after {
  position: absolute;
  top: -54px;
  right: -42px;
  width: 150px;
  height: 150px;
  content: "";
  background: rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  pointer-events: none;
}
.syncroom-option h3 {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  color: var(--navy-700);
  font-family: var(--font-display);
  font-size: 23px;
}
.syncroom-option > p {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--navy-600);
  font-size: 14.5px;
  line-height: 1.8;
}
.syncroom-steps {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 11px;
  padding: 0;
  margin: 20px 0;
  list-style: none;
  counter-reset: syncroom-step;
}
.syncroom-steps li {
  position: relative;
  min-height: 36px;
  padding-left: 48px;
  counter-increment: syncroom-step;
}
.syncroom-steps li::before {
  position: absolute;
  top: 1px;
  left: 0;
  display: grid;
  width: 32px;
  height: 32px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  content: counter(syncroom-step);
  background: var(--brand-gradient);
  border-radius: 50%;
  place-items: center;
}
.syncroom-steps strong { display: block; margin-bottom: 2px; color: var(--navy-700); }
.syncroom-steps span { display: block; color: var(--navy-600); font-size: 14px; line-height: 1.7; }
.syncroom-note {
  position: relative;
  z-index: 1;
  padding: 14px 16px;
  color: var(--navy-600);
  font-size: 13.5px;
  line-height: 1.7;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(91, 187, 168, 0.2);
  border-radius: 12px;
}

.shot {
  margin: 30px 0 40px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 15px;
  box-shadow: var(--shadow-md);
}
.shot::before {
  display: block;
  height: 31px;
  content: "";
  background:
    radial-gradient(circle at 19px 15px, #e0e4e8 0 4px, transparent 5px),
    radial-gradient(circle at 35px 15px, #e0e4e8 0 4px, transparent 5px),
    radial-gradient(circle at 51px 15px, #e0e4e8 0 4px, transparent 5px),
    linear-gradient(#fbfcfe, #f2f5f9);
  border-bottom: 1px solid var(--border-soft);
}
.shot a, .shot img { display: block; }
.shot img { width: 100%; height: auto; }
.shot figcaption {
  padding: 12px 18px 14px;
  color: var(--gray-500);
  font-size: 13px;
  line-height: 1.6;
  background: var(--sky-50);
  border-top: 1px solid var(--border-soft);
}
.shot.narrow { max-width: 760px; }
.shot.small { max-width: 620px; }
.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  align-items: start;
  margin: 30px 0 42px;
}
.shot-grid .shot { margin: 0; }

.table-wrap { margin: 24px 0 34px; overflow-x: auto; border: 1px solid var(--border-soft); border-radius: var(--radius-md); }
.data-table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 14px; }
.data-table th, .data-table td { padding: 14px 17px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border-soft); }
.data-table th { color: var(--navy-700); background: var(--sky-50); }
.data-table td { color: var(--navy-500); line-height: 1.65; }
.data-table td:first-child { color: var(--navy-700); font-weight: 700; }
.data-table tr:last-child td { border-bottom: 0; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 28px 0;
}
.info-card, .guide-card, .route-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.info-card h3, .info-card h4, .route-card h3 { margin: 0 0 8px; color: var(--navy-700); font-family: var(--font-display); }
.info-card p, .route-card p { margin: 0; color: var(--navy-500); font-size: 14px; line-height: 1.75; }
.route-card.recommended { background: linear-gradient(135deg, var(--sky-50), var(--mint-50)); border-color: rgba(91, 187, 168, 0.3); }
.pill {
  display: inline-block;
  padding: 3px 9px;
  margin-bottom: 10px;
  color: var(--mint-600);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  background: var(--mint-100);
  border-radius: 999px;
}
.pill.sky { color: var(--sky-600); background: var(--sky-100); }

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin: 30px 0;
}
.guide-card { position: relative; display: flex; min-height: 230px; flex-direction: column; text-decoration: none; transition: transform 180ms var(--ease-soft), box-shadow 180ms var(--ease-soft); }
.guide-card:hover { color: inherit; box-shadow: var(--shadow-md); transform: translateY(-2px); }
.guide-card .number { color: var(--mint-500); font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; }
.guide-card h2 { margin: 14px 0 10px; color: var(--navy-700); font-family: var(--font-display); font-size: 25px; line-height: 1.4; }
.guide-card p { margin: 0 0 18px; color: var(--navy-500); font-size: 14px; line-height: 1.75; }
.guide-card .go { margin-top: auto; color: var(--sky-600); font-size: 13px; }
.guide-card.featured { background: linear-gradient(135deg, var(--sky-50), var(--mint-50)); }

.checklist { display: grid; gap: 10px; padding: 0; margin: 24px 0; list-style: none; }
.checklist li { position: relative; padding: 13px 16px 13px 46px; color: var(--navy-600); background: var(--gray-50); border: 1px solid var(--border-soft); border-radius: 12px; }
.checklist li::before { position: absolute; top: 13px; left: 16px; width: 22px; height: 22px; content: ""; background: radial-gradient(circle, #fff 0 3px, var(--mint-500) 4px); border-radius: 50%; }

.next-guide {
  display: flex;
  gap: 22px;
  align-items: center;
  justify-content: space-between;
  padding: 26px 28px;
  margin-top: 86px;
  background: var(--brand-gradient-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
}
.next-guide small { display: block; color: var(--sky-600); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; }
.next-guide strong { color: var(--navy-700); font-family: var(--font-display); font-size: 20px; }
.next-guide a { flex: 0 0 auto; }

.footer { position: relative; padding: 70px 56px 46px; overflow: hidden; border-top: 1px solid var(--border-soft); }
.footer-banner { position: absolute; inset: 0; pointer-events: none; background: url("/assets/forest.webp") center top / cover; opacity: 0.42; }
.footer-inner { position: relative; display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: end; max-width: 1208px; margin: 0 auto; }
.footer-tag { margin: 0 0 6px; color: var(--sky-blue); font-family: var(--font-script); font-size: 27px; }
.footer-ja { margin: 0; color: var(--navy-500); font-family: var(--font-display); letter-spacing: 0.06em; }
.footer-meta { color: var(--gray-500); font-size: 12px; line-height: 1.8; text-align: right; }
.footer-meta b { color: var(--navy-600); }
.top-link { position: fixed; right: 24px; bottom: 24px; z-index: 10; display: grid; width: 44px; height: 44px; color: var(--sky-600); text-decoration: none; pointer-events: none; background: #fff; border: 1px solid var(--border-soft); border-radius: 50%; box-shadow: var(--shadow-sm); opacity: 0; transition: opacity 180ms var(--ease-soft); place-items: center; }
.top-link.visible { pointer-events: auto; opacity: 1; }
.reveal { opacity: 0; transform: translateY(6px); transition: opacity 480ms var(--ease-soft), transform 480ms var(--ease-soft); }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .guide-hero { min-height: 0; padding: 42px 28px 48px; }
  .guide-hero::after { right: 28px; left: 28px; }
  .guide-hero-inner { grid-template-columns: 1fr 130px; gap: 24px; }
  .guide-hero-art img { width: 128px; }
  .guide-shell { grid-template-columns: 1fr; gap: 0; padding: 0 28px 80px; }
  .guide-toc { position: static; max-height: none; padding: 30px 0 10px; overflow: visible; }
  .guide-toc ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 14px; }
  .toc-back { grid-template-columns: repeat(2, max-content); }
  .guide-content { padding-top: 42px; }
}

@media (max-width: 680px) {
  .guide-hero-inner { grid-template-columns: 1fr; }
  .guide-hero-art { display: none; }
  .guide-title { font-size: 40px; }
  .guide-lede { font-size: 17px; }
  .guide-toc ol, .card-grid, .guide-grid, .shot-grid { grid-template-columns: 1fr; }
  .sec-head { gap: 14px; }
  .callout { padding: 58px 20px 20px; }
  .callout::before { top: 18px; left: 20px; }
  .syncroom-option { padding: 24px 20px; }
  .syncroom-option h3 { font-size: 21px; }
  .next-guide { align-items: stretch; flex-direction: column; }
  .footer { padding: 56px 28px 38px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .guide-card, .button { transition: none; }
}

@media print {
  .top-ribbon, .guide-toc, .top-link, .hero-banner, .guide-hero-art, .footer-banner { display: none; }
  .guide-hero { min-height: 0; padding: 24px 0; }
  .guide-shell { display: block; padding: 0; }
  .guide-content { padding: 0; }
  .reveal { opacity: 1; transform: none; }
  .shot, .callout, .info-card, .route-card, .data-table { break-inside: avoid; box-shadow: none; }
}