/* =============
   Base
============= */
:root{
  --bg: #f7f7fb;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --accent-2: #f59e0b;
  --line: #e5e7eb;
  --ok: #16a34a;
  --warn: #dc2626;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", "Meiryo", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

/* Subtle animated orbs background */
.bg-orb{
  position: fixed;
  inset: -20vmax;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(40vmax 40vmax at 10% -5%, rgba(99,102,241,.25), transparent 60%),
    radial-gradient(35vmax 35vmax at 110% 10%, rgba(245,158,11,.25), transparent 60%);
  animation: drift 16s ease-in-out infinite alternate;
  filter: blur(0.5px);
}
@keyframes drift{ to{ transform: translate3d(-2%, 1%, 0) scale(1.02); } }

/* Appear on scroll */
.appear{ opacity: 0; transform: translateY(8px); }
.appear.is-visible{ opacity: 1; transform: none; transition: opacity .6s ease, transform .6s ease; }

/* Float-in badge */
.float-in{ animation: floatIn .9s cubic-bezier(.2,.8,.2,1) .2s both; }
@keyframes floatIn{ from{ transform: translateY(10px) scale(.96); opacity: 0; } }

/* Sticky header */
.sticky{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: color-mix(in oklch, white 72%, transparent);
  border-bottom: 1px solid var(--line);
}

/* =============
   Header
============= */
.site-header{
  display:grid;
  grid-template-columns: 140px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 12px clamp(12px, 4vw, 32px);
}

.badge{
  display:flex;
  flex-direction: column;
  align-items: center;
  justify-content:center;
  width: 92px;
  height: 92px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f0f5ff, #ffffff 60%);
  border: 2px solid var(--line);
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}
.badge .class{
  font-size: 34px;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1;
}
.badge .label{
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.titles h1{
  margin:0;
  font-weight: 800;
  line-height: 1.05;
  display:flex;
  flex-wrap: wrap;
  gap: .25ch .5ch;
  align-items: baseline;
  font-size: clamp(18px, 3.5vw, 28px);
}
.titles .thin{ font-weight: 300; letter-spacing: .04em; }
.titles .jp{ padding:.1em .35em; border-radius:.5em; background:#fff; border:1px solid var(--line); }
.titles .year{ color: var(--accent-2); font-weight: 900; }

.subtitle{
  margin:.2rem 0 0;
  color: var(--muted);
  letter-spacing: .35em;
  text-transform: uppercase;
  font-size: 10px;
}

.date-card{
  min-width: 160px;
  justify-self: end;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
  text-align: center;
}
.date-card .date-label{ font-size: 11px; color: var(--muted); letter-spacing: .25em; text-transform: uppercase; }
.date-card .date-value{ margin-top: 2px; font-weight: 800; font-size: 18px; }
.countdown{ margin-top: 4px; font-feature-settings: "tnum"; font-variant-numeric: tabular-nums; }
.countdown.ok{ color: var(--ok); }
.countdown.warn{ color: var(--warn); }

/* =============
   Sections
============= */
main{ padding: 0 clamp(12px, 4vw, 32px) 32px; }
section{ scroll-margin-top: 84px; }

/* Timeline */
.timeline{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
}
.timeline h2{ margin: 0 0 8px; font-size: 18px; }
.timeline-list{ list-style: none; margin:0; padding:0; position: relative; }
.timeline-list::before{
  content:""; position:absolute; left: 86px; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(var(--accent), var(--accent-2)); border-radius: 2px; opacity:.25;
}
.time-item{ display:grid; grid-template-columns: 72px 1fr; gap: 8px 16px; padding: 14px 0; position: relative; }
.time-item + .time-item{ border-top: 1px dashed var(--line); }
.time{ justify-self: end; font-weight: 900; font-size: 22px; letter-spacing: .02em; color: var(--accent); position: relative; }
.time::after{ content:""; position:absolute; right: -18px; top: 50%; translate: 0 -50%; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 6px rgba(37,99,235,.12); }
.place{ font-weight: 700; font-size: 16px; padding-left: 20px;}
.note{ grid-column: 2 / -1; color: var(--muted); padding-left: 20px;}

/* Places */
.places{ margin-top: 16px; }
.places h2{ margin: 0 0 8px; font-size: 18px; }
.place-card{
  display:grid; grid-template-columns: 1.2fr 1fr; gap: 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 12px;
  box-shadow: 0 8px 20px rgba(0,0,0,.05); overflow: clip;
}
.place-card + .place-card{ margin-top: 12px; }
.place-body h3{ margin: 0 0 4px; font-size: 18px; }
.place-body .lead{ margin: 0 0 8px; color: var(--muted); font-size: 14px; }
.place-body .facts{ margin: 0 0 6px; padding-left: 1.2em; }
.place-body .src{ margin: 6px 0 0; font-size: 12px; color: var(--muted); }
.place-media{ border-radius: 10px; overflow:hidden; border:1px solid var(--line); }
/* 固定ビューポート＋動くトラック */
.carousel-viewport{
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.carousel-track{
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  transform: translateX(0);
  transition: transform .6s ease;
  will-change: transform;
}
.carousel-track img{
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
  display: block;
  background: #eef1f5; /* 読み込み中のプレースホルダ */
}

/* Maps */
.maps{ margin-top: 16px; }
.maps h2{ margin: 0 0 8px; font-size: 18px; }
.map-grid{ display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.map-card{ background: var(--card); border:1px solid var(--line); border-radius: 12px; padding: 8px; }
.map-card figcaption{ font-weight: 700; font-size: 14px; margin: 0 0 6px; }
.map-embed{ position: relative; width: 100%; aspect-ratio: 16/10; border-radius: 10px; overflow:hidden; }
.map-embed iframe{ position:absolute; inset:0; width:100%; height:100%; border:0; }

/* Checklist */
.checklist{ margin-top: 16px; }
.checklist h2{ margin: 0 0 8px; font-size: 18px; }
.list{ display:grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; background: var(--card); border:1px solid var(--line); border-radius: 12px; padding: 12px; }
.list label{ display:flex; gap:8px; align-items:center; }
.add-item{ margin-top: 8px; display:flex; gap: 8px; }
.add-item input{ flex:1; padding: 10px 12px; border:1px solid var(--line); border-radius: 999px; }
.btn.small{ padding: 8px 12px; font-size: 14px; }

/* FAQ */
.faq{ margin-top: 16px; }
.faq h2{ margin: 0 0 8px; font-size: 18px; }
.accordion details{ background: var(--card); border:1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
.accordion details + details{ margin-top: 8px; }
.accordion summary{ cursor: pointer; font-weight: 700; }
.accordion .panel{ color: var(--muted); margin-top: 6px; }

/* Emergency */
.emergency{ margin-top: 16px; }
.emergency h2{ margin: 0 0 8px; font-size: 18px; }
.emg-grid{ display:flex; gap: 8px; flex-wrap: wrap; }
.emg-btn{ display:inline-flex; align-items:center; justify-content:center; gap:8px; text-decoration:none; padding:12px 16px; border-radius: 999px; background: linear-gradient(135deg, var(--accent), #4f46e5); color:#fff; font-weight:700; box-shadow: 0 8px 20px rgba(79,70,229,.2); }
.emg-btn.outline{ background: transparent; color: var(--accent); border:2px solid var(--accent); box-shadow:none; }
.muted{ color: var(--muted); }
.small{ font-size: 12px; }

/* Memo */
.memo{ margin-top: 16px; }
.memo h2{ margin: 0 0 8px; font-size: 18px; }
.memo-grid{ display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.memo-card{ background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; box-shadow: 0 8px 20px rgba(0,0,0,.05); }
.memo-card h3{ margin:0 0 8px; font-size: 16px; }
.memo-card ul{ margin:0; padding-left: 1.2em; }

/* Footer */
.site-footer{ padding: 16px clamp(12px, 4vw, 32px) 40px; display:flex; justify-content: center; }
.btn{ appearance:none; border:none; background: linear-gradient(135deg, var(--accent), #4f46e5); color:#fff; padding: 12px 18px; border-radius: 999px; font-weight: 700; box-shadow: 0 10px 25px rgba(79,70,229,.25); cursor:pointer; }
.btn:active{ transform: translateY(1px); }

/* Responsive */
@media (max-width: 900px){
  .site-header{ grid-template-columns: 1fr auto; }
  .badge{ display:none; }
  .place-card{ grid-template-columns: 1fr; }
  .map-grid{ grid-template-columns: 1fr; }
  .list{ grid-template-columns: 1fr; }
  .memo-grid{ grid-template-columns: 1fr; }
}

/* Print (A4 portrait) */
@media print{
  @page{ size: A4; margin: 10mm; }
  body{ background: #fff; }
  .btn, .emg-grid, .add-item{ display:none; }
  .site-header{ position: static; }
  main{ padding: 0; }
  .site-footer{ padding: 0; }
}