/* 1 to 10 — Trip to Japan · page sections */

/* ---------- top bar ---------- */

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--topbar-h);
  z-index: 50;
  color: #fff;
  transition: background-color 240ms var(--ease-ui), box-shadow 240ms var(--ease-ui), color 240ms var(--ease-ui);
}
.topbar.is-solid {
  color: var(--ai);
  background-color: rgba(240, 241, 236, 0.86);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  box-shadow: 0 1px 0 var(--line), 0 6px 24px rgba(17, 26, 49, 0.06);
}
.topbar__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 800 1.12rem/1 var(--f-display); letter-spacing: 0.01em; flex: none; }
.brand .seal { --size: 30px; }
.topnav { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; min-width: 0; }
.topnav::-webkit-scrollbar { display: none; }
.topnav a {
  font: 500 0.74rem/1 var(--f-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0 12px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  white-space: nowrap;
  opacity: 0.86;
  transition: background-color 160ms var(--ease-ui), opacity 160ms var(--ease-ui);
}
.topnav a:hover { opacity: 1; background: rgba(255, 255, 255, 0.14); }
.topbar.is-solid .topnav a:hover { background: rgba(28, 42, 78, 0.07); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: max(660px, 100svh);
  display: grid;
  align-items: end;
  color: #fff;
  background: var(--ai-deep);
  overflow: hidden;
  isolation: isolate;
}
.hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.js .hero__img { animation: heroSettle 800ms var(--ease-out) both; }
@keyframes heroSettle { from { transform: scale(1.06); opacity: 0.6; } to { transform: none; opacity: 1; } }
.hero__shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(to top, rgba(17, 26, 49, 0.94) 0%, rgba(17, 26, 49, 0.62) 34%, rgba(17, 26, 49, 0.1) 64%, rgba(17, 26, 49, 0.32) 100%),
    linear-gradient(to right, rgba(17, 26, 49, 0.5) 0%, rgba(17, 26, 49, 0) 55%);
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
  padding-top: calc(var(--topbar-h) + 48px);
  padding-bottom: clamp(28px, 5vw, 60px);
}
.hero .eyebrow { color: rgba(255, 255, 255, 0.78); }
.hero__title { color: #fff; font-weight: 800; margin: 0 0 22px; }
.hero__num {
  display: block;
  font-size: clamp(4.6rem, 15vw, 11.5rem);
  line-height: 0.88;
  letter-spacing: -0.035em;
  font-variant-numeric: lining-nums;
}
.hero__num .to {
  font-size: 0.36em;
  font-weight: 500;
  letter-spacing: 0;
  vertical-align: 0.62em;
  margin-inline: 0.26em 0.3em;
  color: rgba(255, 255, 255, 0.82);
}
.hero__sub {
  display: block;
  margin-top: 14px;
  font-size: clamp(1.55rem, 3.8vw, 2.9rem);
  font-weight: 500;
  letter-spacing: 0.015em;
  color: rgba(255, 255, 255, 0.94);
}
.hero__lede { color: rgba(255, 255, 255, 0.84); max-width: 48ch; font-size: clamp(1.02rem, 1.4vw, 1.16rem); }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.hero__tategaki {
  position: absolute;
  top: calc(var(--topbar-h) + 36px);
  right: var(--gutter);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.hero__tategaki p {
  writing-mode: vertical-rl;
  margin: 0;
  font: 600 clamp(1.05rem, 1.8vw, 1.45rem)/1.5 var(--f-display);
  letter-spacing: 0.42em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 2px 16px rgba(17, 26, 49, 0.5);
}

/* glass route card */
.glass {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.17), rgba(255, 255, 255, 0.06));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22), 0 18px 48px rgba(10, 16, 32, 0.32);
  backdrop-filter: blur(16px) saturate(1.25);
  -webkit-backdrop-filter: blur(16px) saturate(1.25);
  border-radius: var(--r-lg);
}
.route { padding: 20px 22px 18px; }
.route__label { font: 500 0.7rem/1 var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255, 255, 255, 0.72); margin: 0 0 6px; }
.route__map { width: 100%; height: auto; overflow: visible; }
.route__map .track { fill: none; stroke: rgba(255, 255, 255, 0.28); stroke-width: 2; stroke-dasharray: 2 6; stroke-linecap: round; }
.route__map .trail { fill: none; stroke: #fff; stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 1; stroke-dashoffset: 1; }
.js .route__map.is-in .trail { stroke-dashoffset: 0; transition: stroke-dashoffset 1400ms var(--ease-out) 300ms; }
html:not(.js) .route__map .trail { stroke-dashoffset: 0; }
.route__map .node { fill: var(--shu); stroke: #fff; stroke-width: 2; }
.route__map text { font: 600 13px var(--f-display); fill: #fff; }
.route__map .sm { font: 500 9.5px var(--f-mono); fill: rgba(255, 255, 255, 0.72); letter-spacing: 0.08em; }
.route__legs { list-style: none; margin: 8px 0 0; padding: 12px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; border-top: 1px solid rgba(255, 255, 255, 0.18); }
.route__legs li { display: grid; gap: 2px; }
.route__legs .mono { font-size: 0.68rem; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.7); text-transform: uppercase; }
.route__legs strong { font: 700 1.05rem/1.2 var(--f-display); }
.route__legs .jp { font-size: 0.82rem; color: rgba(255, 255, 255, 0.7); letter-spacing: 0.2em; }

/* ---------- plan / stamp book ---------- */

.plan__grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
.principles { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; }
.principles li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  align-items: start;
  background: var(--paper);
  border-radius: var(--r-md);
  padding: 16px 18px;
  box-shadow: var(--shadow-1);
}
.principles .ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(28, 42, 78, 0.07); color: var(--ai); }
.principles .ico svg { width: 22px; height: 22px; }
.principles strong { display: block; font: 700 1.08rem/1.3 var(--f-display); color: var(--ai); margin-bottom: 2px; }
.principles p { margin: 0; color: var(--nezumi); font-size: 0.97rem; line-height: 1.6; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 28px; }
.stat { background: var(--ai); color: #fff; border-radius: var(--r-md); padding: 16px 16px 14px; }
.stat b { display: block; font: 800 clamp(1.9rem, 3.4vw, 2.6rem)/1 var(--f-display); font-variant-numeric: tabular-nums; }
.stat span { display: block; margin-top: 8px; font: 500 0.7rem/1.35 var(--f-mono); letter-spacing: 0.06em; text-transform: uppercase; color: rgba(255, 255, 255, 0.74); }

.stampbook {
  list-style: none;
  margin: 0;
  padding: clamp(18px, 2.4vw, 28px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  background: var(--paper);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-2);
}
.stampbook__title { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 6px; }
.stampbook__title h3 { font-size: 1.3rem; }
.stampbook__title span { font: 500 0.72rem/1 var(--f-mono); letter-spacing: 0.1em; color: var(--nezumi); text-transform: uppercase; }
.stampbook a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  padding: 12px;
  min-height: 72px;
  border-radius: var(--r-sm);
  text-decoration: none;
  transition: background-color 180ms var(--ease-ui);
}
.stampbook a:hover { background: rgba(28, 42, 78, 0.05); }
.stampbook a:hover .seal { transform: rotate(0deg) scale(1.05); }
.stampbook .seal { --size: 46px; transition: transform 220ms var(--ease-ui); }
.stampbook small { display: block; font: 500 0.68rem/1.2 var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--nezumi); }
.stampbook strong { display: block; font: 700 1rem/1.3 var(--f-display); color: var(--ai); }

/* ---------- chapters ---------- */

.chapter {
  position: relative;
  min-height: clamp(380px, 62vh, 600px);
  display: grid;
  align-items: end;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
  background: var(--ai-deep);
}
.chapter > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.chapter::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(to top, rgba(17, 26, 49, 0.9) 0%, rgba(17, 26, 49, 0.3) 50%, rgba(17, 26, 49, 0.05) 100%); }
.chapter__inner { display: flex; justify-content: space-between; align-items: end; gap: 24px; padding-block: clamp(36px, 6vw, 64px); }
.chapter .eyebrow { color: rgba(255, 255, 255, 0.78); }
.chapter h2 { color: #fff; font-size: clamp(2.8rem, 7vw, 5.4rem); line-height: 0.95; letter-spacing: -0.02em; }
.chapter p { color: rgba(255, 255, 255, 0.92); max-width: 54ch; margin: 16px 0 0; }
/* the words sit on a dark frosted panel, so a bright city photo never fights them */
.chapter__inner > div:first-child {
  max-width: 660px;
  padding: clamp(22px, 2.6vw, 34px) clamp(22px, 3vw, 40px);
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(12, 18, 36, 0.78), rgba(12, 18, 36, 0.58));
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), 0 24px 60px rgba(8, 12, 24, 0.35);
}
.chapter__kanji { writing-mode: vertical-rl; font: 800 clamp(3.4rem, 9vw, 7.5rem)/1 var(--f-display); letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.92); text-shadow: 0 6px 40px rgba(17, 26, 49, 0.5); flex: none; }

/* ---------- days ---------- */

.days-wrap { padding-left: max(var(--gutter), 92px); }
.day { padding-block: clamp(56px, 7vw, 104px); }
.day__main {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(28px, 4.5vw, 72px);
}
.day + .day { border-top: 1px solid var(--line); }
.day__media { position: sticky; top: calc(var(--topbar-h) + 36px); align-self: start; }
.day__media .ph { aspect-ratio: 4 / 5; box-shadow: var(--shadow-2); }
.day__media .seal { position: absolute; top: -20px; left: -16px; z-index: 3; --size: 86px; }
.day__kicker { font: 500 0.76rem/1 var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--shu-deep); margin: 0 0 14px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; }
.day__kicker span + span::before { content: "·"; margin-right: 14px; color: var(--nezumi); }
.day h3 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); letter-spacing: -0.01em; margin-bottom: 16px; }
.day__lede { font-size: 1.12rem; color: var(--nezumi); max-width: 60ch; }

.slots { list-style: none; margin: 30px 0 0; padding: 0; position: relative; }
.slots::before { content: ""; position: absolute; left: 7px; top: 10px; bottom: 10px; width: 1px; background: var(--line-strong); }
.slot { position: relative; padding: 0 0 26px 38px; }
.slot::before { content: ""; position: absolute; left: 1px; top: 7px; width: 13px; height: 13px; border-radius: 50%; background: var(--washi); box-shadow: inset 0 0 0 2px var(--ai); }
.slot--key::before { background: var(--shu); box-shadow: inset 0 0 0 2px var(--shu), 0 0 0 4px rgba(198, 62, 41, 0.16); }
.slot__time { display: block; font: 500 0.74rem/1 var(--f-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--nezumi); margin-bottom: 8px; font-variant-numeric: tabular-nums; }
.slot h4 { font-size: 1.24rem; margin-bottom: 6px; }
.slot h4 .jp { font-weight: 500; font-size: 0.86em; color: var(--nezumi); margin-left: 6px; letter-spacing: 0.06em; }
.slot p { margin: 0 0 8px; color: #34373f; }
.slot .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }

.notes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.note { border-radius: var(--r-md); padding: 16px 18px; font-size: 0.95rem; line-height: 1.6; }
.note h5 { margin: 0 0 6px; font: 600 0.72rem/1 var(--f-mono); letter-spacing: 0.12em; text-transform: uppercase; }
.note p { margin: 0; }
.note--book { background: rgba(198, 62, 41, 0.07); box-shadow: inset 0 0 0 1px rgba(198, 62, 41, 0.18); }
.note--book h5 { color: var(--shu-deep); }
.note--swap { background: rgba(61, 91, 72, 0.08); box-shadow: inset 0 0 0 1px rgba(61, 91, 72, 0.2); }
.note--swap h5 { color: var(--matsu); }
.note--wide { grid-column: 1 / -1; }

/* fixed day rail */
.dayrail {
  position: fixed;
  left: 20px;
  top: 50%;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform: translate(-12px, -50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 260ms var(--ease-ui), transform 260ms var(--ease-ui);
}
.dayrail.is-on { opacity: 1; transform: translate(0, -50%); pointer-events: auto; }
.dayrail a {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  text-decoration: none;
  font: 800 1.1rem/1 var(--f-display);
  color: var(--ai);
  background: rgba(251, 251, 248, 0.9);
  box-shadow: var(--shadow-1), inset 0 0 0 1px var(--line);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background-color 200ms var(--ease-ui), color 200ms var(--ease-ui), transform 200ms var(--ease-ui), box-shadow 200ms var(--ease-ui);
}
.dayrail a:hover { transform: translateX(3px); }
.dayrail a[aria-current="step"] { background: var(--shu); color: #fff; transform: rotate(-6deg); box-shadow: 0 6px 16px rgba(198, 62, 41, 0.35); }

.principles .principle--key { box-shadow: var(--shadow-1), inset 0 0 0 1.5px rgba(198, 62, 41, 0.35); }
.principles .principle--key .ico { background: var(--shu); color: #fff; }

/* day rail tooltips (pointer devices only) */
.dayrail a { position: relative; }
.dayrail .tip {
  position: absolute;
  left: calc(100% + 14px);
  top: 50%;
  translate: -6px -50%;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  padding: 9px 14px 10px;
  border-radius: 12px;
  background: var(--ai);
  color: #fff;
  font: 700 0.98rem/1.25 var(--f-display);
  box-shadow: 0 2px 4px rgba(17, 26, 49, 0.08), 0 12px 32px rgba(17, 26, 49, 0.22);
  transition: opacity 160ms var(--ease-ui), translate 160ms var(--ease-ui);
}
.dayrail .tip::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 50%;
  width: 10px;
  height: 10px;
  background: inherit;
  border-radius: 2px;
  transform: translateY(-50%) rotate(45deg);
}
.dayrail .tip small {
  display: block;
  margin-bottom: 3px;
  font: 500 0.64rem/1.2 var(--f-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}
.dayrail a[aria-current="step"] .tip { rotate: 6deg; }
.dayrail a:hover .tip,
.dayrail a:focus-visible .tip { opacity: 1; translate: 0 -50%; }
@media (hover: none), (max-width: 900px) { .dayrail .tip { display: none; } }