/* Page-specific layout. Tokens and chrome live in base.css. */

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

.hero { padding: 64px 0 20px; }
.hero .eyebrow { margin: 0 0 18px; }

.hero h1 {
  font-size: clamp(38px, 6.6vw, 82px);
  max-width: 15ch;
  margin: 0 0 22px;
}

/* The half-life figure is the whole point of the page, so it gets the serif
   and the accent — the one place either is used at this size. */
.hl-figure {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--accent-text);
  white-space: nowrap;
}

.hero-sub {
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 62ch;
  margin: 0 0 44px;
}

/* --- stat band ------------------------------------------------------------ */

.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 30px 8px;
  margin-bottom: 8px;
}

.stat { padding: 0 22px; }
.stat + .stat { border-left: 1px solid var(--line); }

.stat-v {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 10px;
}

.stat-k { font-size: 13px; line-height: 1.45; color: var(--ink-2); font-weight: 500; }
.stat-k em { font-style: normal; color: var(--accent-text); font-weight: 700; }

/* --- sections ------------------------------------------------------------- */

/* padding-TOP only, never the shorthand. Every section is `class="wrap sec"`,
   and app.css loads after base.css, so `padding: 76px 0 0` silently zeroed
   .wrap's horizontal padding on every section of the page. Above 1240px the
   max-width hid it; at any narrower viewport the text ran into the edge of the
   screen. */
.sec { padding-top: 76px; }
.sec-head { margin-bottom: 26px; max-width: 68ch; }
.sec-head h2 { font-size: clamp(26px, 3.2vw, 38px); margin-bottom: 12px; }
.sec-head p { font-size: 15.5px; line-height: 1.6; margin: 0; }

/* --- chart ---------------------------------------------------------------- */

.chart-card { padding: 30px 30px 22px; }
.chart { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }

.chart-area { fill: var(--accent-soft); }
.chart-line { fill: none; stroke: var(--accent-text); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart-dot { fill: var(--panel-solid); stroke: var(--accent-text); stroke-width: 2.5; }
.chart-grid { stroke: var(--line); stroke-width: 1; }
.chart-half { stroke: var(--bad); stroke-width: 1.5; stroke-dasharray: 5 4; opacity: 0.75; }
.chart-label { fill: var(--ink-3); font-size: 11.5px; font-weight: 600; font-family: var(--sans); }
.chart-value { fill: var(--ink); font-size: 12.5px; font-weight: 800; font-family: var(--sans); }
.chart-halflabel { fill: var(--bad); font-size: 11.5px; font-weight: 700; font-family: var(--sans); }

/* Hover target is a full-height column, not the 4px dot — a 5%-survival point
   sits at the very bottom of the plot and would be unhittable otherwise. */
.chart-hit { fill: transparent; cursor: default; }
.chart-hit:hover + .chart-dot,
.chart-hit:focus + .chart-dot { r: 7; }

.chart-note { font-size: 12.5px; line-height: 1.55; margin: 18px 0 0; max-width: 78ch; }

/* --- the cliff callout ---------------------------------------------------- */

.cliff {
  margin-top: 16px;
  padding: 26px 30px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.cliff-fig {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.cliff p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--ink-2); flex: 1 1 340px; }
.cliff strong { color: var(--ink); }

/* --- table ---------------------------------------------------------------- */

.table-card { padding: 6px; }
.table-scroll { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }

th {
  text-align: left;
  padding: 14px 16px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
  border-bottom: 1px solid var(--line);
}

td { padding: 13px 16px; border-bottom: 1px solid var(--line); white-space: nowrap; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.14s; }
tbody tr:hover { background: var(--panel-2); }

.r { text-align: right; }

.sym { font-weight: 700; letter-spacing: -0.01em; }
.sym-addr { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); margin-left: 8px; }

.mult { font-weight: 800; color: var(--accent-text); font-variant-numeric: tabular-nums; }
.dd { font-variant-numeric: tabular-nums; }
.dd-hot { color: var(--bad); font-weight: 700; }

.explorer-link {
  font-size: 12px;
  color: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  transition: color 0.15s, border-color 0.15s;
}

.explorer-link:hover { color: var(--ink); border-color: var(--line-2); }

.empty { padding: 40px 16px; text-align: center; color: var(--ink-3); font-size: 14px; }

/* --- fee tier bars -------------------------------------------------------- */

.fee-bar-h, .fee-bar-c { width: 180px; }
.fee-bar-c { padding-right: 20px; }

.fee-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  overflow: hidden;
}

.fee-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--accent-text);
}

.tier-note { font-size: 12.5px; margin: 14px 2px 0; max-width: 70ch; line-height: 1.55; }

@media (max-width: 760px) {
  .fee-bar-h, .fee-bar-c { display: none; }
}

/* --- method --------------------------------------------------------------- */

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 12px;
}

.m-card { padding: 26px 26px 28px; }
.m-card h2, .m-card h3 { font-size: 16.5px; margin-bottom: 11px; letter-spacing: -0.02em; }
.m-card p { margin: 0; font-size: 14px; line-height: 1.62; color: var(--ink-2); }
.m-card strong { color: var(--ink); font-weight: 700; }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--accent-soft);
  color: var(--accent-text);
  padding: 1px 5px;
  border-radius: 5px;
}

.provenance { margin-top: 12px; padding: 26px 30px 28px; }
.provenance h2 { font-size: 16.5px; margin-bottom: 16px; letter-spacing: -0.02em; }

.provenance dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 9px 26px;
  font-size: 13.5px;
}

.provenance dt { color: var(--ink-3); font-weight: 600; }
.provenance dd { margin: 0; font-family: var(--mono); font-size: 12.5px; word-break: break-all; }
.provenance dd a { border-bottom: 1px solid var(--line-2); }
.provenance dd a:hover { color: var(--accent-text); border-color: var(--accent-line); }

/* --- responsive ----------------------------------------------------------- */

@media (max-width: 900px) {
  .stat-band { grid-template-columns: repeat(2, 1fr); gap: 26px 8px; }
  .stat:nth-child(3) { border-left: none; }
}

@media (max-width: 560px) {
  .hero { padding-top: 40px; }
  .sec { padding-top: 56px; }
  .stat-band { grid-template-columns: 1fr; padding: 24px 8px; }
  .stat + .stat { border-left: none; border-top: 1px solid var(--line); padding-top: 22px; }
  .chart-card { padding: 20px 14px 16px; }
  .cliff { padding: 22px; gap: 16px; }
  .provenance dl { grid-template-columns: 1fr; gap: 3px 0; }
  .provenance dt { margin-top: 10px; }
}

/* Scopes a column header to the window it actually measures. "Trades" alone
   read as a lifetime count next to an Age column showing days. */
.th-scope {
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: none;
  color: var(--ink-3);
  opacity: 0.8;
}

/* Axis ticks mark band boundaries; the dots sit between them. */
.chart-tick { stroke: var(--line-2); stroke-width: 1; }

/* The card that documents a metric this page got wrong. Flagged because it is
   the most useful thing here, not the least. */
.m-card-flag {
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

:root[data-theme='dark'] .m-card-flag { background: var(--accent-soft); }

/* --- halvings + remaining life -------------------------------------------- */

.halvings, .remaining-card { margin-top: 16px; padding: 26px 30px 28px; }
.halvings h2, .remaining-card h2 { font-size: 16.5px; margin-bottom: 18px; letter-spacing: -0.02em; }
.halvings > p, .remaining-card > .dim { font-size: 13px; line-height: 1.6; margin: 18px 0 0; max-width: 76ch; }
.remaining-card > .dim { margin: 0 0 20px; }

.halving-row, .remaining-row {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.halving-v {
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 800;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.halving-k { font-size: 12px; color: var(--ink-3); margin-top: 6px; font-weight: 600; }

/* The stretch factor is the finding, so the connector carries it rather than
   being a decorative arrow. */
.halving-arrow {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 3px 10px;
  border: 1px dashed var(--line-2);
  border-radius: 999px;
  white-space: nowrap;
}

.remaining-row { gap: 12px; }

.remaining {
  flex: 1 1 118px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--panel-2);
}

.remaining-age { font-size: 11.5px; font-weight: 600; }
.remaining-v {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent-text);
  font-variant-numeric: tabular-nums;
  margin: 5px 0 3px;
}
.remaining-n { font-size: 11px; }

/* --- sub headings --------------------------------------------------------- */

.sec-head.sub { margin-top: 46px; }
.sec-head.sub h3 { font-size: clamp(19px, 2.2vw, 24px); font-weight: 800; letter-spacing: -0.025em; margin-bottom: 10px; }

/* --- cohort explorer ------------------------------------------------------ */

.cohort-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

#c-search {
  flex: 1 1 300px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}

#c-search::placeholder { color: var(--ink-3); }
#c-search:focus { outline: none; border-color: var(--accent-line); box-shadow: 0 0 0 3px var(--accent-soft); }

.seg { display: inline-flex; border: 1px solid var(--line-2); border-radius: 999px; overflow: hidden; }

.seg-b {
  border: none;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 0 14px;
  height: 38px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.seg-b:hover { color: var(--ink); }
.seg-b.on { background: var(--accent); color: var(--accent-ink); }

.btn-sm { height: 32px; padding: 0 14px; font-size: 13px; }

th.sortable { padding: 0; }

/* The header cell's button carries the padding so the whole cell is the hit
   target, and inherits the header's type so it does not look like a control. */
.th-sort {
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  text-align: inherit;
  cursor: pointer;
  transition: color 0.15s;
}

.th-sort:hover { color: var(--ink); }
th.r .th-sort { text-align: right; }
th.sortable[data-dir='desc']::after { content: ' ↓'; color: var(--accent-text); }
th.sortable[data-dir='asc']::after { content: ' ↑'; color: var(--accent-text); }

.mono { font-family: var(--mono); font-size: 12.5px; font-weight: 600; }

.tag-dead, .tag-live {
  display: inline-block;
  margin-left: 9px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.tag-dead { background: rgba(194, 51, 74, 0.12); color: var(--bad); }
.tag-live { background: var(--accent-soft); color: var(--accent-text); }

.table-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px 10px;
  font-size: 12.5px;
}

/* --- trend ---------------------------------------------------------------- */

.trend-line { fill: none; stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.trend-0 { stroke: var(--accent-text); }
.trend-1 { stroke: var(--ink-3); stroke-dasharray: 6 4; }
.trend-2 { stroke: var(--bad); stroke-dasharray: 2 4; }
.trend-lab-0 { fill: var(--accent-text); }
.trend-lab-1 { fill: var(--ink-3); }
.trend-lab-2 { fill: var(--bad); }

.chart.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  font-size: 15px;
  color: var(--ink-3);
  font-weight: 600;
}

@media (max-width: 560px) {
  .halvings, .remaining-card { padding: 22px; }
  .halving-row { gap: 12px; }
  .cohort-controls { flex-direction: column; align-items: stretch; }
  .seg { justify-content: center; }

  /* flex-basis follows the MAIN axis, so the 300px basis that sizes the search
     box horizontally on desktop makes it 300px TALL once the row becomes a
     column — a full-width pill 300px high with the placeholder floating in the
     middle of it. The height declaration does not save it because flex-basis
     wins over height on the main axis. */
  #c-search { flex: none; width: 100%; }
}

/* The line under the stat band. Frames the median against the launch rate —
   the two numbers are only striking next to each other. */
.hero-kicker {
  margin: 20px 4px 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 70ch;
}

.hero-kicker strong { color: var(--accent-text); font-weight: 800; }

/* --- landing page cards --------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 12px;
}

.nav-card {
  display: block;
  padding: 26px 26px 28px;
  transition: transform 0.18s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.18s, border-color 0.18s;
}

.nav-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-lg), inset 0 1px 0 var(--sheen);
}

.nav-card-stat {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--accent-text);
}

.nav-card-lab { font-size: 11.5px; font-weight: 600; margin-top: 7px; }

.nav-card h3 {
  font-size: 16.5px;
  letter-spacing: -0.02em;
  margin: 18px 0 8px;
}

.nav-card p { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--ink-2); }

/* An arrow that only appears on hover would be decoration; this one is always
   there so the card reads as a link without needing to be hovered. */
.nav-card h3::after {
  content: ' →';
  color: var(--accent-text);
  transition: margin-left 0.18s;
  display: inline-block;
}

.nav-card:hover h3::after { margin-left: 4px; }

/* --- per-page heading ----------------------------------------------------- */

/* Each page's h1 replaces the hero's, so it needs the h2 scale rather than the
   82px hero scale — it is a section title that happens to be the page title. */
.page-h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 12px;
}

.nav-links a.on { color: var(--ink); font-weight: 700; }

/* --- prev / next ---------------------------------------------------------- */

.pagenav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 84px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.pagenav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color 0.15s;
}

.pagenav a:hover { color: var(--accent-text); }
.pagenav a span { font-size: 11.5px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.pagenav-r { text-align: right; }

@media (max-width: 560px) {
  .pagenav { margin-top: 56px; }
  .nav-card { padding: 22px; }
}

/* --- mobile navigation ---------------------------------------------------- */

/* The hamburger only exists below the width where .nav-links is hidden. Above
   it the links are already visible and a menu button would be a second, worse
   way to reach the same places. */
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }

  /* Re-shown as a dropdown. base.css hides .nav-links entirely at this width,
     which was correct when the whole site was one page of anchors and left a
     phone with no navigation at all once it became seven pages. */
  .nav-links {
    display: none;
    position: absolute;
    /* Below the 66px nav, not overlapping its bottom edge — the nav gains a
       background once the page scrolls, and a 4px overlap reads as a seam. */
    top: 72px;
    right: 16px;
    left: 16px;
    flex-direction: column;
    gap: 0;
    padding: 6px;
    border: 1px solid var(--line-2);
    border-radius: var(--r);
    background: var(--panel-solid);
    box-shadow: var(--shadow-lg);
    z-index: 70;
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    padding: 13px 14px;
    border-radius: var(--r-sm);
    font-size: 15px;
    font-weight: 600;
  }

  .nav-links a + a { border-top: 1px solid var(--line); }
  .nav-links a.on { background: var(--accent-soft); color: var(--accent-text); }
}

@media (prefers-reduced-motion: no-preference) {
  .nav-links.open { animation: navdrop 0.16s cubic-bezier(0.22, 0.61, 0.36, 1); }
}

@keyframes navdrop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* --- hour-of-day bars ----------------------------------------------------- */

.hour-bar { fill: var(--accent-soft); stroke: var(--accent-line); stroke-width: 1; transition: fill 0.15s; }
.hour-bar:hover { fill: var(--accent-line); }
.hour-peak { fill: var(--accent-text); stroke: var(--accent-text); }
.hour-low { fill: var(--panel-2); stroke: var(--line-2); }

.context-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

/* The 404's copy sits above the same cards the landing page uses. */
.notfound .eyebrow { margin-bottom: 14px; }
.notfound .muted { max-width: 56ch; margin: 0 0 34px; font-size: 15.5px; line-height: 1.6; }
.notfound a { color: var(--accent-text); border-bottom: 1px solid var(--accent-line); }

/* Card headings carry the h3 scale regardless of their tag — the level is
   chosen for document structure, the size for the design. */
.card-h { font-size: 16.5px; font-weight: 800; letter-spacing: -0.02em; }

/* Available to screen readers, out of the visual flow. Used where a heading is
   needed for correct document structure but would be noise on screen. */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* The interval under the hero figure. Deliberately quiet — it qualifies the
   headline rather than competing with it — but present, because a number that
   moves between visits and never admits it is the fastest way to lose a reader
   who came here for numbers that hold up. */
.hl-ci {
  margin: -8px 0 22px;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-3);
  max-width: 62ch;
}