:root {
  --dusk: #1b1622;
  --dusk-2: #241d2e;
  --dusk-3: #2f263b;
  --line: #43385a;
  --fog: #e9e3f0;
  --muted: #b8aec8;
  --pink: #ff6b8b;
  --amber: #ffb547;
  --serif: Cochin, Constantia, "Palatino Linotype", Palatino, Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --gutter: clamp(16px, 4vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--fog); font: 400 1.125rem/1.65 var(--serif);
  background:
    radial-gradient(120% 60% at 50% 0, rgba(255, 107, 139, 0.18), transparent 60%),
    linear-gradient(180deg, #221a2c 0, var(--dusk) 520px);
  background-color: var(--dusk);
}
[hidden] { display: none !important; }
a { color: var(--amber); text-underline-offset: 0.2em; }
h1, h2, h3 { margin: 0; font-weight: 400; line-height: 1.1; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
.skip { position: absolute; left: var(--gutter); top: -80px; z-index: 20; background: var(--amber); color: var(--dusk); padding: 0.6rem 1rem; }
.skip:focus { top: 12px; }

.site-header { max-width: 1180px; margin: 0 auto; padding: 20px var(--gutter); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--fog); text-decoration: none; font-size: 1.3rem; letter-spacing: 0.02em; }
.brand svg { width: 32px; height: 32px; }
.brand b { font-weight: 400; color: var(--amber); }
.site-header ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; margin: 0; padding: 0; list-style: none; }
.site-header nav a { color: var(--fog); text-decoration: none; font-style: italic; }
.site-header nav a:hover { color: var(--amber); }

.hero { max-width: 1180px; margin: 0 auto; padding: clamp(24px, 5vw, 56px) var(--gutter) clamp(48px, 7vw, 88px); text-align: center; }
.horizon {
  font: 700 clamp(5rem, 24vw, 16rem)/0.9 var(--serif); letter-spacing: -0.02em;
  background: linear-gradient(180deg, var(--amber) 15%, var(--pink) 60%, rgba(255, 107, 139, 0) 98%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin: 0.2rem 0 1rem; font-style: italic; }
.lede { max-width: 60ch; margin: 0 auto; color: var(--muted); font-size: 1.2rem; }
.stats { margin: 2.5rem auto 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; max-width: 1000px; }
.stats div { background: var(--dusk-2); padding: 1.1rem 0.9rem; }
.stats dt { font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.stats dd { margin: 0.3rem 0 0; font: 700 clamp(1.15rem, 2.4vw, 1.6rem)/1.2 var(--mono); color: var(--fog); overflow-wrap: anywhere; }
.stats dd span { display: block; font: 400 0.85rem/1.3 var(--serif); color: var(--amber); font-style: italic; margin-top: 0.25rem; }

.band { max-width: 1180px; margin: 0 auto; padding: clamp(48px, 7vw, 88px) var(--gutter); border-top: 1px solid var(--line); }
.band > h2 { font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: 1.25rem; }
.band > h2::before { content: ""; display: block; width: 56px; height: 4px; border-radius: 4px; margin-bottom: 1rem; background: linear-gradient(90deg, var(--amber), var(--pink)); }
.section-lede { color: var(--muted); max-width: 66ch; margin-bottom: 1.75rem; }

.rules { list-style: none; margin: 0 0 2rem; padding: 0; counter-reset: r; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.rules li { counter-increment: r; background: var(--dusk-2); border: 1px solid var(--line); border-radius: 14px; padding: 1.4rem; }
.rules li::before { content: "0" counter(r); font: 700 0.9rem var(--mono); color: var(--pink); display: block; margin-bottom: 0.6rem; }
.rules h3 { font-size: 1.4rem; margin-bottom: 0.5rem; }
.rules p { color: var(--muted); }
.aside { border-left: 4px solid var(--amber); background: rgba(255, 181, 71, 0.07); padding: 1.1rem 1.25rem; border-radius: 0 12px 12px 0; max-width: 820px; }
.aside h3 { font-size: 1.3rem; margin-bottom: 0.4rem; color: var(--amber); }
.aside p { color: var(--fog); }

/* Chart */
.chart-wrap { background: var(--dusk-2); border: 1px solid var(--line); border-radius: 16px; padding: clamp(12px, 2.5vw, 24px); }
.chart { display: block; width: 100%; height: auto; touch-action: pan-y; cursor: crosshair; }
.chart .axis text { font: 12px var(--mono); fill: var(--muted); }
.chart .marker text { font: italic 13px var(--serif); fill: var(--amber); }
.scrub { display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: center; margin: 1rem 0; }
.scrub label { font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.scrub input { width: 100%; accent-color: var(--pink); }
.readout { margin: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0.75rem; }
.readout div { background: var(--dusk-3); border-radius: 10px; padding: 0.7rem 0.8rem; min-width: 0; }
.readout dt { font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.readout dd { margin: 0.2rem 0 0; font: 600 1.02rem/1.3 var(--mono); overflow-wrap: anywhere; }
.fine { margin-top: 1rem; color: var(--muted); font-size: 0.98rem; font-style: italic; }

/* Table */
.table-wrap { overflow: auto; max-height: 70vh; border: 1px solid var(--line); border-radius: 14px; }
.halving-table { width: 100%; border-collapse: collapse; min-width: 860px; font-variant-numeric: tabular-nums; }
.halving-table th, .halving-table td { padding: 0.55rem 0.8rem; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
.halving-table td { font: 0.92rem/1.4 var(--mono); }
.halving-table thead th { position: sticky; top: 0; z-index: 1; background: var(--dusk-3); font: 400 0.8rem/1.3 var(--serif); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.halving-table tbody th { font: 700 1rem var(--mono); color: var(--amber); }
.halving-table td span { display: block; font-size: 0.75rem; color: var(--muted); }
.halving-table tr.past { background: rgba(255, 181, 71, 0.06); }
.halving-table tr.last { background: rgba(255, 107, 139, 0.12); }
.halving-table tr.end { background: linear-gradient(90deg, rgba(255, 181, 71, 0.2), rgba(255, 107, 139, 0.2)); }
.halving-table tr.end td, .halving-table tr.end th { border-bottom: 0; font-weight: 700; }

.after-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.after-grid article { background: var(--dusk-2); border: 1px solid var(--line); border-radius: 14px; padding: 1.4rem; }
.after-grid h3 { font-size: 1.45rem; margin-bottom: 0.5rem; font-style: italic; }
.after-grid p { color: var(--muted); }

.site-footer { max-width: 1180px; margin: 0 auto; padding: 1.5rem var(--gutter) 3rem; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem; color: var(--muted); font-size: 0.98rem; }
.site-footer strong { color: var(--fog); font-weight: 400; }

@media (max-width: 960px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rules { grid-template-columns: 1fr; }
  .readout { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .readout div:first-child { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .stats dd { font-size: 1rem; overflow-wrap: normal; }
  .after-grid { grid-template-columns: 1fr; }
  .scrub { grid-template-columns: 1fr; gap: 0.3rem; }
}

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