:root {
  color-scheme: dark;
  --bg: #07101d;
  --bg-soft: #0b1727;
  --panel: rgba(13, 28, 47, .78);
  --panel-strong: #10223a;
  --text: #f5f8fc;
  --muted: #9eb0c7;
  --line: rgba(158, 176, 199, .17);
  --accent: #70d7ff;
  --accent-2: #7ff0c6;
  --warning: #ffd476;
  --danger: #ff9a9a;
  --shadow: 0 22px 60px rgba(0,0,0,.24);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #edf4fb;
  --bg-soft: #f7fbff;
  --panel: rgba(255,255,255,.88);
  --panel-strong: #ffffff;
  --text: #102033;
  --muted: #5f7187;
  --line: rgba(25, 58, 88, .12);
  --accent: #0879af;
  --accent-2: #087b61;
  --warning: #a05b00;
  --danger: #b42323;
  --shadow: 0 18px 50px rgba(43,72,98,.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  background:
    radial-gradient(circle at 15% 0%, rgba(60, 176, 232, .13), transparent 28rem),
    radial-gradient(circle at 90% 12%, rgba(75, 219, 174, .10), transparent 24rem),
    var(--bg);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: calc(70px + env(safe-area-inset-top));
  padding:
    calc(11px + env(safe-area-inset-top))
    max(20px, env(safe-area-inset-right))
    11px
    max(20px, env(safe-area-inset-left));
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; gap: 11px; align-items: center; }
.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: block;
  box-shadow: 0 10px 30px rgba(68, 194, 233, .2);
}
.brand strong { display:block; font-size: 17px; }
.brand small { display:block; color: var(--muted); font-size: 11px; margin-top: 2px; }
.top-actions { display:flex; gap:8px; align-items:center; }
.primary-button, .ghost-button {
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 10px 14px;
  font-weight: 750;
}
.primary-button { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color:#06131c; border:0; }
.ghost-button { background: var(--panel); color: var(--text); }
.primary-button:disabled, .ghost-button:disabled { opacity:.5; cursor:not-allowed; }

.page-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.hero { padding: 74px 0 42px; display:grid; grid-template-columns: 1.25fr .75fr; gap: 34px; align-items:end; }
.eyebrow { margin:0 0 9px; color: var(--accent); font-size: 12px; font-weight: 900; letter-spacing:.16em; }
h1 { margin:0; font-size: clamp(42px, 7vw, 78px); line-height:.98; letter-spacing:-.055em; }
h1 span { color: var(--accent); }
.hero-copy { max-width: 700px; color:var(--muted); line-height:1.8; font-size:15px; }
.panel { background: var(--panel); border:1px solid var(--line); border-radius:22px; box-shadow:var(--shadow); }
.hero-status { padding:20px; display:flex; gap:14px; align-items:center; }
.status-dot { width:12px; height:12px; border-radius:50%; background:var(--warning); box-shadow:0 0 0 7px color-mix(in srgb, var(--warning) 16%, transparent); }
.status-dot.ok { background:var(--accent-2); box-shadow:0 0 0 7px color-mix(in srgb, var(--accent-2) 16%, transparent); }
.hero-status small,.hero-status span { display:block; color:var(--muted); }
.hero-status strong { display:block; margin:4px 0; }

.section-tabs {
  display:flex;
  gap:8px;
  position:sticky;
  top: calc(72px + env(safe-area-inset-top));
  z-index:20;
  padding:8px;
  margin-bottom:28px;
  width:max-content;
  max-width:100%;
  overflow:auto;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:16px;
  backdrop-filter:blur(16px);
}
.section-tabs a { padding:9px 15px; border-radius:11px; color:var(--muted); font-weight:800; font-size:13px; white-space:nowrap; }
.section-tabs a:hover { background:var(--panel-strong); color:var(--text); }
.section-block { padding:44px 0 32px; scroll-margin-top:150px; }
.section-heading { display:flex; justify-content:space-between; gap:28px; align-items:end; margin-bottom:20px; }
.section-heading h2 { margin:0; font-size:clamp(26px,4vw,40px); letter-spacing:-.035em; }
.section-heading > p { max-width:520px; margin:0; color:var(--muted); line-height:1.7; }

.airport-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; }
.airport-card { overflow:hidden; background:var(--panel); border:1px solid var(--line); border-radius:24px; box-shadow:var(--shadow); }
.airport-head { padding:20px 20px 14px; display:flex; justify-content:space-between; gap:12px; align-items:start; border-bottom:1px solid var(--line); }
.airport-title h3 { margin:0; font-size:25px; letter-spacing:-.035em; }
.airport-title p { margin:3px 0 0; color:var(--muted); font-size:13px; }
.chips { display:flex; flex-wrap:wrap; justify-content:flex-end; gap:6px; }
.chip { border:1px solid var(--line); border-radius:999px; padding:5px 8px; color:var(--muted); font-size:10px; font-weight:900; letter-spacing:.03em; }
.chip.ok { color:var(--accent-2); border-color:color-mix(in srgb,var(--accent-2) 35%,transparent); }
.chip.warn { color:var(--warning); border-color:color-mix(in srgb,var(--warning) 35%,transparent); }
.chip.danger { color:var(--danger); border-color:color-mix(in srgb,var(--danger) 35%,transparent); }
.report { padding:18px 20px; border-bottom:1px solid var(--line); }
.report:last-child { border-bottom:0; }
.report-top { display:flex; justify-content:space-between; gap:12px; align-items:center; margin-bottom:10px; }
.report-label { font-size:12px; font-weight:950; letter-spacing:.12em; color:var(--accent); }
.copy-button { border:1px solid var(--line); background:transparent; color:var(--muted); padding:6px 9px; border-radius:9px; font-size:11px; }
.raw { margin:0; min-height:44px; white-space:pre-wrap; overflow-wrap:anywhere; font-family:"SFMono-Regular",Consolas,monospace; font-size:13px; line-height:1.65; }
.report-meta { margin-top:10px; display:grid; gap:4px; color:var(--muted); font-size:11px; }
.unavailable { color:var(--warning); font-weight:800; }
.last-known { margin-top:12px; padding:11px 12px; border:1px dashed var(--line); border-radius:13px; background:color-mix(in srgb,var(--panel-strong) 70%,transparent); }
.last-known summary { cursor:pointer; color:var(--muted); font-size:11px; font-weight:850; }
.last-known pre { margin:10px 0 0; white-space:pre-wrap; overflow-wrap:anywhere; font:12px/1.55 "SFMono-Regular",Consolas,monospace; }

.history-panel { padding:18px; margin-bottom:18px; }
.archive-state { display:flex; justify-content:space-between; gap:12px; padding-bottom:14px; margin-bottom:14px; border-bottom:1px solid var(--line); }
.archive-state span { color:var(--muted); }
.history-controls { display:grid; grid-template-columns:1fr 1fr auto; gap:12px; align-items:end; }
.history-controls label { display:grid; gap:7px; color:var(--muted); font-size:12px; font-weight:800; }
.history-controls input,.history-controls select { width:100%; border:1px solid var(--line); background:var(--bg-soft); color:var(--text); padding:11px 12px; border-radius:12px; }
.muted { color:var(--muted); font-size:13px; }

.guide-search { padding:18px; margin-bottom:16px; }
.guide-search > label { display:block; margin-bottom:8px; color:var(--muted); font-size:12px; font-weight:850; }
.guide-search-row { display:grid; grid-template-columns:1fr auto; gap:10px; }
.guide-search input {
  min-width:0;
  width:100%;
  border:1px solid var(--line);
  border-radius:13px;
  background:var(--bg-soft);
  color:var(--text);
  padding:12px 14px;
  outline:none;
}
.guide-search input:focus { border-color:color-mix(in srgb,var(--accent) 65%,var(--line)); box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 13%,transparent); }
.guide-list { display:grid; gap:12px; }
.guide-section { overflow:hidden; }
.guide-section > summary {
  list-style:none;
  cursor:pointer;
  padding:18px 20px;
  display:flex;
  justify-content:space-between;
  gap:18px;
  align-items:center;
  font-weight:900;
}
.guide-section > summary::-webkit-details-marker { display:none; }
.guide-section > summary::after { content:"＋"; color:var(--accent); font-size:20px; }
.guide-section[open] > summary::after { content:"−"; }
.guide-section-title small { display:block; margin-top:4px; color:var(--muted); font-weight:600; font-size:12px; }
.guide-items { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; padding:0 14px 14px; }
.guide-item {
  min-width:0;
  padding:15px;
  border:1px solid var(--line);
  border-radius:16px;
  background:color-mix(in srgb,var(--panel-strong) 68%,transparent);
}
.guide-code-row { display:flex; flex-wrap:wrap; gap:7px; align-items:center; margin-bottom:8px; }
.guide-code { display:inline-flex; padding:5px 8px; border-radius:8px; background:color-mix(in srgb,var(--accent) 12%,transparent); color:var(--accent); font:800 12px/1.2 "SFMono-Regular",Consolas,monospace; }
.guide-item h4 { margin:0 0 7px; font-size:14px; }
.guide-item p { margin:0; color:var(--muted); font-size:12px; line-height:1.7; }
.guide-item .guide-example { margin-top:8px; color:var(--text); font-family:"SFMono-Regular",Consolas,monospace; font-size:11px; }
.guide-empty { padding:22px; text-align:center; color:var(--muted); }
.example-heading { margin-top:42px; }
.example-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:14px; }
.example-card { padding:18px; }
.example-card h3 { margin:0 0 4px; }
.example-card > p { margin:0 0 14px; color:var(--muted); font-size:12px; }
.example-raw { margin:0 0 14px; padding:12px; border-radius:12px; background:var(--bg-soft); white-space:pre-wrap; overflow-wrap:anywhere; font:12px/1.6 "SFMono-Regular",Consolas,monospace; }
.example-breakdown { display:grid; gap:7px; }
.example-breakdown div { display:grid; grid-template-columns:90px 1fr; gap:9px; font-size:12px; line-height:1.55; }
.example-breakdown code { color:var(--accent); font-family:"SFMono-Regular",Consolas,monospace; }
.example-breakdown span { color:var(--muted); }

.loading-card { min-height:330px; display:grid; place-items:center; color:var(--muted); }
footer { width:min(1180px,calc(100% - 32px)); margin:50px auto 0; padding:24px 0 calc(26px + env(safe-area-inset-bottom)); border-top:1px solid var(--line); color:var(--muted); font-size:11px; line-height:1.7; }
.privacy-note { opacity:.78; }
.version-note { opacity:.48; }



/* --- Exam alert --------------------------------------------------------- */
body.exam-alert-open { overflow:hidden; }
.exam-alert-backdrop {
  position:fixed;
  inset:0;
  z-index:10000;
  display:grid;
  place-items:center;
  padding:calc(22px + env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) calc(22px + env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
  background:rgba(2,9,18,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  animation:examBackdropIn .22s ease-out;
}
.exam-alert-backdrop[hidden] { display:none !important; }
.exam-alert-card {
  position:relative;
  width:min(560px,100%);
  max-height:min(760px,calc(100dvh - 44px - env(safe-area-inset-top) - env(safe-area-inset-bottom)));
  overflow:auto;
  padding:28px;
  border:1px solid color-mix(in srgb,var(--accent) 48%,var(--line));
  border-radius:28px;
  background:
    radial-gradient(circle at 90% 0%, color-mix(in srgb,var(--accent) 14%,transparent), transparent 36%),
    linear-gradient(145deg, color-mix(in srgb,var(--panel-strong) 96%,#0c2442 4%), var(--panel));
  color:var(--text);
  box-shadow:0 28px 90px rgba(0,0,0,.5),0 0 45px color-mix(in srgb,var(--accent) 10%,transparent);
  animation:examCardIn .3s cubic-bezier(.2,.8,.2,1);
}
.exam-alert-close {
  position:absolute;
  top:16px;
  right:16px;
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:1px solid var(--line);
  border-radius:50%;
  background:color-mix(in srgb,var(--panel-strong) 88%,transparent);
  color:var(--muted);
  font-size:24px;
  line-height:1;
  cursor:pointer;
}
.exam-alert-kicker {
  display:flex;
  align-items:center;
  gap:9px;
  margin:0 44px 12px 0;
  color:var(--accent);
  font-size:12px;
  font-weight:950;
  letter-spacing:.16em;
}
.exam-alert-live-dot {
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--accent-2);
  box-shadow:0 0 0 6px color-mix(in srgb,var(--accent-2) 12%,transparent),0 0 16px color-mix(in srgb,var(--accent-2) 65%,transparent);
  animation:examPulse 1.8s ease-in-out infinite;
}
.exam-alert-card h2 {
  margin:0;
  padding-right:34px;
  font-size:clamp(27px,5vw,38px);
  line-height:1.12;
  letter-spacing:-.04em;
}
.exam-alert-description { margin:9px 0 20px; color:var(--muted); font-size:13px; line-height:1.65; }
.exam-alert-highlight {
  display:grid;
  grid-template-columns:48px 1fr;
  gap:14px;
  align-items:center;
  padding:15px;
  margin-top:11px;
  border:1px solid color-mix(in srgb,var(--accent-2) 30%,var(--line));
  border-radius:18px;
  background:color-mix(in srgb,var(--accent-2) 7%,var(--panel-strong));
}
.exam-alert-highlight.secondary {
  border-color:color-mix(in srgb,#8da8ff 32%,var(--line));
  background:color-mix(in srgb,#8da8ff 7%,var(--panel-strong));
}
.exam-alert-backdrop[data-tone="urgent"] .exam-alert-highlight.secondary {
  border-color:color-mix(in srgb,var(--warning) 46%,var(--line));
  background:color-mix(in srgb,var(--warning) 9%,var(--panel-strong));
}
.exam-alert-icon {
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#06131c;
  font-size:22px;
  font-weight:950;
}
.exam-alert-icon.calendar { background:linear-gradient(135deg,#8da8ff,var(--accent)); }
.exam-alert-backdrop[data-tone="urgent"] .exam-alert-icon.calendar { background:linear-gradient(135deg,var(--warning),#ff9d68); }
.exam-alert-highlight strong { display:block; color:var(--accent-2); font-size:19px; letter-spacing:-.02em; }
.exam-alert-highlight.secondary strong { color:#a9bcff; }
.exam-alert-backdrop[data-tone="urgent"] .exam-alert-highlight.secondary strong { color:var(--warning); }
.exam-alert-highlight span { display:block; margin-top:3px; color:var(--muted); font-size:12px; }
.exam-alert-dates { margin:18px 0 0; padding:0; border-top:1px solid var(--line); }
.exam-alert-dates > div { display:grid; grid-template-columns:1fr auto; gap:18px; padding:11px 2px; border-bottom:1px solid var(--line); }
.exam-alert-dates dt { color:var(--muted); font-size:12px; }
.exam-alert-dates dd { margin:0; color:var(--text); font-size:12px; font-weight:850; text-align:right; }
.exam-alert-actions { display:grid; grid-template-columns:1fr 1fr; gap:9px; margin-top:18px; }
.exam-alert-actions a,.exam-alert-dismiss {
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:11px 12px;
  border-radius:13px;
  font-size:12px;
  font-weight:900;
  text-align:center;
}
.exam-alert-primary { background:linear-gradient(135deg,var(--accent),var(--accent-2)); color:#06131c; }
.exam-alert-secondary { border:1px solid var(--line); background:var(--panel-strong); color:var(--text); }
.exam-alert-dismiss { grid-column:1/-1; border:0; background:transparent; color:var(--muted); cursor:pointer; }
.exam-alert-note { margin:8px 0 0; color:var(--muted); font-size:10px; line-height:1.55; text-align:center; }
@keyframes examBackdropIn { from { opacity:0; } to { opacity:1; } }
@keyframes examCardIn { from { opacity:0; transform:translateY(18px) scale(.975); } to { opacity:1; transform:none; } }
@keyframes examPulse { 0%,100% { opacity:1; transform:scale(1); } 50% { opacity:.48; transform:scale(.82); } }

@media (max-width: 900px) {
  .hero { grid-template-columns:1fr; padding-top:48px; }
  .airport-grid { grid-template-columns:1fr; }
  .guide-items { grid-template-columns:1fr; }
  .example-grid { grid-template-columns:1fr; }
  .section-heading { align-items:start; flex-direction:column; }
}

@media (max-width: 620px) {
  .page-shell { width:min(100% - 22px,1180px); }
  .topbar {
    min-height: calc(64px + env(safe-area-inset-top));
    padding:
      calc(9px + env(safe-area-inset-top))
      max(11px, env(safe-area-inset-right))
      9px
      max(11px, env(safe-area-inset-left));
  }
  .brand small { display:none; }
  .brand-icon { width:38px; height:38px; border-radius:12px; }
  .primary-button { padding:9px 11px; }
  .hero { padding-top:36px; }
  .hero-copy { font-size:14px; }
  .section-tabs { top: calc(66px + env(safe-area-inset-top)); width:100%; }
  .history-controls { grid-template-columns:1fr 1fr; }
  .history-controls button { grid-column:1/-1; }
  .section-block { padding-top:34px; }
  .guide-search-row { grid-template-columns:1fr; }
  .guide-search-row button { width:100%; }
  .example-breakdown div { grid-template-columns:74px 1fr; }
}