:root {
  --navy: #0f2747;
  --ink: #1d2633;
  --gold: #b98a35;
  --gold-soft: #efe1c6;
  --paper: #fffaf1;
  --white: #ffffff;
  --mist: #eef3f7;
  --line: rgba(15, 39, 71, 0.14);
  --shadow: 0 18px 42px rgba(15, 39, 71, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Meiryo", system-ui, sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button,
a.button {
  min-height: 48px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  background: var(--white);
  padding: 10px 14px;
  z-index: 10;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  background: var(--navy);
  color: var(--white);
}

.hero {
  min-height: 86svh;
  display: grid;
  align-items: end;
  position: relative;
  overflow: hidden;
}

.hero__photo {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 39, 71, 0.18), rgba(15, 39, 71, 0.92)),
    url("./assets/photos/hero-gunkanjima.jpg");
  background-size: cover;
  background-position: center 34%;
  filter: saturate(0.88);
  transform: scale(1.02);
}

.hero__content {
  position: relative;
  width: min(960px, 100%);
  padding: 42px 22px 34px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--gold-soft);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  color: inherit;
}

h1 {
  max-width: 11em;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2.45rem, 11vw, 5.8rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.55rem, 6vw, 2.6rem);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
}

h3 {
  font-size: 1.12rem;
}

.hero__lead {
  max-width: 38em;
  margin: 18px 0 0;
  font-size: 1.04rem;
}

.hero__actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: var(--radius);
  padding: 12px 16px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
}

.button--primary {
  background: var(--gold);
  color: #16120a;
}

.button--ghost {
  border-color: rgba(255, 255, 255, 0.42);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.button--light {
  background: var(--white);
  border-color: var(--line);
  color: var(--navy);
}

.quick-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  scrollbar-width: none;
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(10px);
}

.quick-nav a {
  white-space: nowrap;
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  font-size: 0.9rem;
}

.section {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 52px 0 0;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading .section-kicker,
.next-card .section-kicker {
  color: var(--gold);
}

.section-heading p:not(.section-kicker) {
  margin: 10px 0 0;
}

.section--compact {
  padding-top: 42px;
}

.next-card {
  margin-top: -28px;
  position: relative;
  z-index: 2;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: grid;
  gap: 16px;
}

.next-card__body {
  padding: 14px;
  background: var(--mist);
  border-radius: var(--radius);
}

.overview-grid,
.card-grid,
.compact-grid,
.guide-grid {
  display: grid;
  gap: 14px;
}

.overview-grid {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.overview-card,
.spot-card,
.compact-card,
.guide-card,
.highlight-card,
.story-card,
.notice,
.faq-item,
.timeline {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(15, 39, 71, 0.08);
}

.overview-card,
.compact-card,
.guide-card,
.faq-item {
  padding: 18px;
}

.overview-card span,
.meta,
.price {
  color: #657183;
  font-size: 0.92rem;
}

.story-card {
  padding: 24px;
  border-left: 6px solid var(--gold);
}

.story-card p:first-child {
  font-size: 1.12rem;
  font-weight: 700;
}

.notice {
  margin-top: 16px;
  padding: 18px;
  background: #fff5dd;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  overflow-x: auto;
}

.tab-button {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--navy);
  border-radius: 999px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 700;
  white-space: nowrap;
}

.tab-button[aria-selected="true"] {
  background: var(--navy);
  color: var(--white);
}

.timeline {
  padding: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 14px;
  position: relative;
  padding: 12px 0;
}

.timeline-item + .timeline-item {
  border-top: 1px solid var(--line);
}

.time {
  color: var(--gold);
  font-weight: 800;
}

.timeline-item strong {
  color: var(--navy);
}

.timeline-badge {
  display: inline-block;
  margin-top: 7px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: #5c4319;
  font-size: 0.8rem;
  font-weight: 700;
}

.highlight-list {
  display: grid;
  gap: 16px;
}

.highlight-card {
  overflow: hidden;
}

.highlight-card__top {
  padding: 18px;
  background: linear-gradient(135deg, var(--navy), #24476f);
  color: var(--white);
}

.highlight-card__body {
  padding: 18px;
  display: grid;
  gap: 12px;
}

.quote-line {
  border-left: 4px solid var(--gold);
  padding-left: 12px;
  font-weight: 800;
  color: var(--navy);
}

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.spot-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.spot-photo {
  min-height: 170px;
  background:
    linear-gradient(135deg, rgba(15, 39, 71, 0.72), rgba(185, 138, 53, 0.45)),
    var(--photo);
  background-size: cover;
  background-position: center;
  color: var(--white);
  display: flex;
  align-items: flex-end;
  padding: 14px;
}

.spot-photo span {
  background: rgba(15, 39, 71, 0.72);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
}

.spot-card__body {
  padding: 18px;
  display: grid;
  gap: 10px;
  flex: 1;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag {
  border-radius: 999px;
  background: var(--mist);
  padding: 3px 9px;
  font-size: 0.82rem;
}

.guide-grid,
.compact-grid {
  grid-template-columns: repeat(auto-fit, minmax(235px, 1fr));
}

.source-list {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.source-list ul {
  padding-left: 1.1em;
  margin: 10px 0 0;
}

.source-list li + li {
  margin-top: 8px;
}

.source-list span {
  display: block;
  color: #657183;
  font-size: 0.88rem;
}

.guide-card ul,
.compact-card ul,
.highlight-card ul {
  padding-left: 1.1em;
  margin: 8px 0 0;
}

.rating {
  color: var(--gold);
  font-weight: 800;
}

.checklist {
  display: grid;
  gap: 10px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px 14px;
}

.check-row input {
  width: 22px;
  height: 22px;
  accent-color: var(--gold);
}

.faq-item + .faq-item {
  margin-top: 10px;
}

.faq-item summary {
  cursor: pointer;
  color: var(--navy);
  font-weight: 800;
}

.site-footer {
  margin-top: 56px;
  background: var(--navy);
  color: rgba(255, 255, 255, 0.86);
  padding: 26px 18px 72px;
  font-size: 0.92rem;
}

.site-footer p {
  width: min(1080px, 100%);
  margin: 0 auto 8px;
}

:focus-visible {
  outline: 3px solid #e4b85b;
  outline-offset: 3px;
}

@media (min-width: 760px) {
  .hero__content {
    padding: 74px 48px 60px;
  }

  .section {
    padding-top: 72px;
  }

  .next-card {
    grid-template-columns: 220px 1fr;
    align-items: center;
    padding: 26px;
  }

  .timeline-item {
    grid-template-columns: 110px 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}