/* A calm, reference-work look (think encyclopedia or research note): light paper, serif headings,
   blue links, muted colours. The aim is trust and neutrality, not alarm. */
:root {
  --bg: #f8f9fa;
  --paper: #ffffff;
  --line: #c8ccd1;
  --line-soft: #eaecf0;
  --text: #202122;
  --muted: #54595d;
  --faint: #72777d;
  --link: #3366cc;
  --accent: #3d5a80;
  --accent-soft: #e8eef6;
  --up: #b32424;
  --down: #14866d;
  --note-bg: #eaf3ff;
  --note-line: #c4d7f5;
  --serif: "Source Serif 4", "Noto Serif JP", Georgia, "Times New Roman", serif;
  --sans: "Inter", "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.6; }
html[lang="ja"] body { line-height: 1.8; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- header ---------- */
.topbar { background: var(--paper); border-bottom: 1px solid var(--line); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 960px; margin: 0 auto; padding: 12px 16px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--text); font: 600 20px var(--serif); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 22px; height: 22px; }
.nav { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.lang { display: flex; gap: 4px; }
.lang button, .range button {
  background: var(--paper); border: 1px solid var(--line); color: var(--muted);
  font: 500 12px var(--sans); padding: 4px 10px; border-radius: 3px; cursor: pointer;
}
.lang button.on, .range button.on { color: var(--text); border-color: var(--text); background: var(--line-soft); }

main { max-width: 960px; margin: 0 auto; padding: 0 16px; }

/* ---------- hero ---------- */
.hero { padding: 32px 0 8px; }
.eyebrow { margin: 0 0 20px; text-align: center; font: 600 clamp(20px, 3.4vw, 26px)/1.35 var(--serif); }
.hero-grid { display: flex; align-items: center; justify-content: center; gap: 44px; flex-wrap: wrap; }
.clock { width: min(220px, 60vw); height: auto; }
.clock .face { fill: var(--paper); stroke: var(--line); stroke-width: 1.5; }
.clock .tick { stroke: var(--line); stroke-width: 1.5; }
.clock .tick.major { stroke: var(--faint); stroke-width: 2; }
.clock .danger { fill: none; stroke: var(--accent); stroke-width: 5; stroke-linecap: round; opacity: 0.9; }
.clock .hand { stroke: var(--text); stroke-width: 3; stroke-linecap: round; transform-origin: 100px 100px; transition: transform 1.4s cubic-bezier(.2, .8, .2, 1); }
.clock .hub { fill: var(--text); }
.clock .twelve { fill: var(--faint); font: 500 12px var(--sans); text-anchor: middle; }

.readout { text-align: left; }
.pct { margin: 0; font: 700 clamp(64px, 15vw, 104px)/1 var(--serif); letter-spacing: -0.02em; font-variant-numeric: lining-nums tabular-nums; }
.pct-sign { font-size: 0.42em; color: var(--muted); margin-left: 4px; font-weight: 400; }
.change { margin: 10px 0 0; font: 600 15px var(--sans); }
.change.up { color: var(--up); }
.change.down { color: var(--down); }
.change.flat { color: var(--muted); }
.midnight { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.asof { margin: 2px 0 0; color: var(--faint); font-size: 13px; }

.subs { display: flex; justify-content: center; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.sub { min-width: 160px; border: 1px solid var(--line); border-radius: 4px; padding: 10px 18px; background: var(--paper); text-align: center; }
.sub-label { color: var(--muted); font-size: 13px; }
.sub-val { font: 700 28px/1.25 var(--serif); font-variant-numeric: lining-nums tabular-nums; }
.sub-val small { font-size: 0.55em; color: var(--muted); margin-left: 2px; font-weight: 400; }
.sub-chg { font-size: 12px; }
.sub-chg.up { color: var(--up); }
.sub-chg.down { color: var(--down); }
.sub-chg.flat { color: var(--faint); }

/* The day's one-line note, as a quiet speech bubble rather than a headline. */
.note-bubble { position: relative; max-width: 620px; margin: 30px auto 0; padding: 12px 16px 12px 16px; background: var(--note-bg); border: 1px solid var(--note-line); border-radius: 10px; font-size: 15px; color: var(--text); }
.note-bubble::before { content: ""; position: absolute; top: -8px; left: 28px; width: 14px; height: 14px; background: var(--note-bg); border-left: 1px solid var(--note-line); border-top: 1px solid var(--note-line); transform: rotate(45deg); }
.note-who { display: block; font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.note-bubble[hidden] { display: none; }

/* ---------- panels ---------- */
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: 4px; padding: 20px 22px; margin: 18px 0; }
.panel h2 { margin: 0 0 14px; padding-bottom: 6px; border-bottom: 1px solid var(--line-soft); font: 600 21px/1.3 var(--serif); }
.panel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; border-bottom: 1px solid var(--line-soft); margin-bottom: 14px; }
.panel-head h2 { border: 0; margin: 0; }
.note { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

.events { list-style: none; margin: 0; padding: 0; }
.events li { display: grid; grid-template-columns: 64px 1fr; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line-soft); }
.events li:first-child { border-top: 0; padding-top: 0; }
.events .delta { font: 600 14px var(--sans); font-variant-numeric: tabular-nums; padding-top: 2px; }
.events .delta.up { color: var(--up); }
.events .delta.down { color: var(--down); }
.events .title { font-weight: 600; }
.events .summary { color: var(--muted); margin: 4px 0 0; font-size: 15px; }
.events .meta { color: var(--faint); font-size: 12px; margin-top: 4px; }
.events.compact li { padding: 8px 0; }
.events.compact .summary { display: none; }
.events li.empty { display: block; color: var(--muted); }
.archived { font-size: 11px; color: var(--faint); margin-left: 6px; }

.chart-wrap { position: relative; }
.chart { width: 100%; height: 240px; display: block; }
.chart .grid { stroke: var(--line-soft); stroke-width: 1; }
.chart .axis { fill: var(--faint); font: 11px var(--sans); }
.chart .line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; }
.chart .dot { fill: var(--paper); stroke: var(--accent); stroke-width: 2; }
.chart .dot.event { fill: var(--accent); }
.chart .hit { fill: transparent; cursor: crosshair; }
.tip { position: absolute; pointer-events: none; background: var(--paper); border: 1px solid var(--line); box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08); border-radius: 4px; padding: 7px 10px; font-size: 12px; max-width: 260px; transform: translate(-50%, -112%); }
.horizon-tabs { display: flex; gap: 6px; margin: 0 0 12px; }

.definition { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.mix { display: grid; gap: 14px; }
.mix-row { display: grid; grid-template-columns: minmax(120px, 210px) 1fr 64px; gap: 12px; align-items: center; }
.mix-label { font-size: 14px; }
.mix-label small { display: block; color: var(--faint); font-size: 12px; }
.bar { height: 8px; background: var(--line-soft); border-radius: 2px; overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--accent); }
.mix-val { font: 600 15px var(--sans); text-align: right; font-variant-numeric: tabular-nums; }

.sources { margin-top: 18px; }
.sources summary { cursor: pointer; color: var(--link); font-size: 14px; }
.table-wrap { overflow-x: auto; margin-top: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 7px 8px; border: 1px solid var(--line-soft); vertical-align: top; }
th { background: var(--bg); color: var(--text); font-weight: 600; }
td.num { white-space: nowrap; font-variant-numeric: tabular-nums; }
.live { color: var(--down); font-size: 11px; margin-left: 4px; white-space: nowrap; }

.share-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.share-buttons a, .share-buttons button {
  background: var(--paper); border: 1px solid var(--line); color: var(--text); border-radius: 3px;
  padding: 7px 16px; font: 500 14px var(--sans); cursor: pointer;
}
.share-buttons a:hover, .share-buttons button:hover { border-color: var(--text); text-decoration: none; }

.method p, .method li { font-size: 15px; }
.method h3 { font: 600 17px var(--serif); margin: 22px 0 6px; }
.method ol, .method ul { padding-left: 22px; }
.method .formula { font-family: var(--mono); background: var(--bg); border: 1px solid var(--line-soft); border-radius: 3px; padding: 10px 12px; overflow-x: auto; font-size: 13px; }

.footer { border-top: 1px solid var(--line); background: var(--paper); margin-top: 28px; }
.footer-inner { max-width: 960px; margin: 0 auto; padding: 20px 16px 40px; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 8px 0; }
.muted { color: var(--faint); }

/* ---------- archive page ---------- */
.archive-day { border-top: 1px solid var(--line-soft); padding: 14px 0; }
.archive-day:first-of-type { border-top: 0; padding-top: 0; }
.archive-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 18px; }
.archive-date { font: 600 17px var(--serif); min-width: 150px; }
.archive-nums { font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
.archive-nums b { color: var(--text); }
.archive-note { color: var(--muted); font-size: 14px; margin: 4px 0 0; }
.archive-day .events { margin-top: 8px; }
.downloads { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 14px; }

@media (max-width: 600px) {
  .hero-grid { gap: 16px; }
  .readout { text-align: center; }
  .events li { grid-template-columns: 54px 1fr; gap: 10px; }
  .mix-row { grid-template-columns: 1fr 56px; }
  .mix-row .bar { grid-column: 1 / -1; grid-row: 2; }
  .nav .nav-link { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .clock .hand { transition: none; }
}
.archive-nums .up { color: var(--up); }
.archive-nums .down { color: var(--down); }