:root {
  --paper: #f4f0e8;
  --paper-strong: #fffaf0;
  --ink: #243447;
  --muted: #64727c;
  --line: rgba(36, 52, 71, 0.16);
  --blue: #2f6f9f;
  --green: #4f7a5a;
  --gold: #b88732;
  --lavender: #8c6aa8;
  --snow: #eef7f8;
  --shadow: 0 22px 60px rgba(36, 52, 71, 0.16);
  --radius: 8px;
  --font-display: "Avenir Next", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-body: "Hiragino Sans", "PingFang TC", "Noto Sans TC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgba(47, 111, 159, 0.55);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 30;
  transform: translateY(-140%);
  background: var(--ink);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
}

.skip-link:focus {
  transform: translateY(0);
}

.hero {
  min-height: 92vh;
  position: relative;
  display: grid;
  grid-template-columns: minmax(24px, 1fr) minmax(0, 1120px) minmax(24px, 1fr);
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  isolation: isolate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 24, 35, 0.68), rgba(10, 24, 35, 0.22) 52%, rgba(10, 24, 35, 0.08)),
    linear-gradient(0deg, rgba(244, 240, 232, 0.95), rgba(244, 240, 232, 0) 34%);
}

.hero__image {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: url("./assets/cover-tateyama-kurobe.png");
  background-size: cover;
  background-position: center 54%;
  transform: scale(1.02);
  animation: settle 900ms ease-out both;
}

.topbar {
  grid-column: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  color: white;
  position: relative;
  z-index: 5;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
}

.topbar__links {
  display: flex;
  gap: 6px;
  align-items: center;
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(14px);
  padding: 6px;
  border-radius: 999px;
}

.topbar__links a {
  padding: 7px 12px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  transition: background 160ms ease, color 160ms ease;
}

.topbar__links a:hover {
  background: rgba(255, 255, 255, 0.18);
  color: white;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.13);
  border-radius: 999px;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: white;
}

.hero__content {
  grid-column: 2;
  align-self: center;
  max-width: 690px;
  color: white;
  padding: 72px 0 120px;
  animation: rise 720ms ease-out 120ms both;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 0;
  font-size: 13px;
}

.hero .eyebrow {
  color: #f4d28f;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(44px, 8vw, 92px);
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
}

h3 {
  margin: 0;
  font-size: 21px;
}

.hero__lead {
  max-width: 620px;
  margin: 20px 0 0;
  font-size: 19px;
  color: rgba(255, 255, 255, 0.9);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  background: white;
  color: var(--ink);
}

.button--ghost {
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.1);
}

.hero__panel {
  grid-column: 2;
  align-self: end;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 720px;
  margin-bottom: 42px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  border-radius: var(--radius);
  overflow: hidden;
  color: white;
}

.hero__panel div {
  padding: 18px;
  background: rgba(12, 30, 42, 0.22);
}

.metric__label {
  display: block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.68);
}

.hero__panel strong {
  display: block;
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 1.25;
}

.hero__panel span:last-child {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

.route-band {
  background: var(--paper);
  padding: 18px 24px 0;
}

.route-band__inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(9, minmax(86px, 1fr));
  gap: 10px;
  overflow-x: auto;
  padding: 0 0 10px;
}

.route-stop {
  min-width: 86px;
  position: relative;
  padding: 22px 4px 0;
  text-align: center;
  font-size: 13px;
}

.route-stop::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 9px;
  height: 9px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgba(47, 111, 159, 0.12);
}

.route-stop::after {
  content: "";
  position: absolute;
  top: 12px;
  left: calc(50% + 12px);
  width: calc(100% - 10px);
  height: 1px;
  background: rgba(47, 111, 159, 0.35);
}

.route-stop:last-child::after {
  display: none;
}

.route-stop strong {
  display: block;
}

.route-stop span {
  color: var(--muted);
  font-size: 12px;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 86px 24px;
}

.section--tight {
  padding-top: 68px;
}

.section__header {
  max-width: 680px;
  margin-bottom: 28px;
}

.section__header p:last-child {
  margin: 12px 0 0;
  color: var(--muted);
}

.day-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 14px;
}

.day-tab,
.filter-chip {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.58);
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.day-tab[aria-selected="true"],
.filter-chip.is-active {
  background: var(--ink);
  color: white;
  border-color: var(--ink);
}

.day-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 22px;
  align-items: stretch;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.day-detail__main {
  padding: 28px;
}

.day-detail__main h3 {
  font-size: 34px;
  margin-bottom: 10px;
}

.day-detail__route {
  color: var(--muted);
  margin: 0 0 20px;
}

.day-detail__side {
  background: var(--snow);
  padding: 28px;
  border-left: 1px solid var(--line);
}

.info-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.info-item {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.info-item strong {
  display: block;
  color: var(--blue);
  margin-bottom: 3px;
}

.weather-cards {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.weather-card {
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 206px;
}

.weather-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: 24px;
  margin: 8px 0;
}

.weather-card span {
  color: var(--muted);
  font-size: 13px;
}

.weather-card p {
  margin: 12px 0 0;
}

.alpine {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 34px;
  align-items: center;
}

.alpine__copy {
  position: sticky;
  top: 24px;
}

.alpine__copy p:last-child {
  color: var(--muted);
}

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

.alpine-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 14px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.alpine-step__num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--blue);
  color: white;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
}

.alpine-step p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.spot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.spot-card,
.product-card,
.store-card,
.souvenir-card,
.check-group {
  background: rgba(255, 255, 255, 0.64);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.spot-card {
  overflow: hidden;
}

.spot-card__bar {
  height: 8px;
  background: var(--blue);
}

.spot-card__body {
  padding: 18px;
}

.spot-card p,
.product-card p,
.store-card p,
.souvenir-card p {
  color: var(--muted);
  margin: 10px 0 0;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(47, 111, 159, 0.1);
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.shop-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 22px;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.product-card {
  padding: 18px;
  animation: fade-in 260ms ease both;
}

.product-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.risk {
  font-weight: 700;
}

.risk--low {
  color: var(--green);
}

.risk--mid {
  color: var(--gold);
}

.risk--high {
  color: #9d433d;
}

.store-panel {
  align-self: start;
  position: sticky;
  top: 18px;
  background: var(--ink);
  color: white;
  border-radius: var(--radius);
  padding: 20px;
}

.store-panel h3 {
  margin-bottom: 14px;
}

.store-card {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
  padding: 14px;
  margin-top: 10px;
}

.store-card p {
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
}

.souvenir-rail {
  display: grid;
  grid-template-columns: repeat(6, minmax(180px, 1fr));
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.souvenir-card {
  min-width: 180px;
  padding: 18px;
}

.souvenir-card h3 {
  color: var(--blue);
}

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

.check-group {
  padding: 18px;
}

.check-item {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  align-items: start;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.check-item:first-of-type {
  border-top: 0;
}

.check-item input {
  margin-top: 5px;
  accent-color: var(--blue);
}

.check-item:has(input:checked) {
  color: rgba(100, 114, 124, 0.56);
  text-decoration: line-through;
}

.source-box {
  background: rgba(255, 255, 255, 0.64);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.source-box summary {
  cursor: pointer;
  font-weight: 700;
}

.source-box li {
  margin: 10px 0;
  overflow-wrap: anywhere;
}

.source-box a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 12;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--ink);
  color: white;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@keyframes settle {
  from {
    transform: scale(1.08);
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

@media (max-width: 940px) {
  .weather-cards,
  .spot-grid,
  .product-list,
  .checklist__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .day-detail,
  .alpine,
  .shop-layout {
    grid-template-columns: 1fr;
  }

  .day-detail__side {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .store-panel,
  .alpine__copy {
    position: static;
  }
}

@media (max-width: 720px) {
  .hero {
    min-height: 96vh;
    grid-template-columns: 18px minmax(0, 1fr) 18px;
  }

  .topbar__links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    border-radius: var(--radius);
    padding: 10px;
    background: rgba(20, 36, 49, 0.92);
  }

  .topbar__links.is-open {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-toggle {
    display: block;
  }

  .hero__content {
    padding: 42px 0 80px;
  }

  .hero__lead {
    font-size: 17px;
  }

  .hero__panel {
    grid-template-columns: 1fr;
    margin-bottom: 22px;
  }

  .section {
    padding: 58px 18px;
  }

  .weather-cards,
  .spot-grid,
  .product-list,
  .checklist__body {
    grid-template-columns: 1fr;
  }

  .route-band {
    padding-left: 18px;
    padding-right: 18px;
  }
}

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