/* The Improbability Drive. Tokens and type from the design spec; circles and
   1px rules only; the wit lives in rotation. */

:root {
  --paper: #F5F1E6;
  --card: #FCFAF3;
  --ink: #201B14;
  --muted: #7A7060;
  --line: #E0D8C6;
  --red: #C02A12;
  --red-dn: #99200C;
  --red-deep: #7C1806;
  --guide: #1E7A46;
  --ghost: #EBE3CF;
  --disabled: #D9D2C1;
  --on-red: #F5F1E6;

  --serif: Newsreader, "Iowan Old Style", Georgia, serif;
  --sans: Archivo, "Helvetica Neue", Arial, sans-serif;
  --mono: "Space Mono", "SFMono-Regular", Menlo, monospace;

  --button: 320px;
  --drop: 8px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16130E;
    --card: #1D1913;
    --ink: #EAE3D3;
    --muted: #948A78;
    --line: #2C2820;
    --red: #E14A2E;
    --red-dn: #B33418;
    --red-deep: #8A2610;
    --guide: #3FA36A;
    --ghost: #221E16;
    --disabled: #2C2820;
    --on-red: #16130E;
  }
}
:root[data-theme="dark"] {
  --paper: #16130E;
  --card: #1D1913;
  --ink: #EAE3D3;
  --muted: #948A78;
  --line: #2C2820;
  --red: #E14A2E;
  --red-dn: #B33418;
  --red-deep: #8A2610;
  --guide: #3FA36A;
  --ghost: #221E16;
  --disabled: #2C2820;
  --on-red: #16130E;
}

*, *::before, *::after { box-sizing: border-box; }
html { height: 100%; }
body {
  margin: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dn); text-decoration: underline; }
button { font: inherit; color: inherit; cursor: pointer; }
[hidden] { display: none !important; }
sup { line-height: 0; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---- type roles ---- */
.label {
  font-family: var(--sans); font-weight: 600; font-size: 11px; line-height: 1;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.guide { font-family: var(--serif); font-size: 24px; line-height: 1.45; }
.aside { font-family: var(--serif); font-style: italic; color: var(--muted); }

/* ---- page frame ---- */
.drive {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 56px 24px 28px;
  overflow-x: clip;
}
.ghost {
  position: absolute; top: 8px; right: 36px;
  font-family: var(--mono); font-size: 220px; line-height: 1;
  color: var(--ghost); user-select: none; pointer-events: none;
}

.top { position: relative; text-align: center; }
.tagline { margin: 0; font-family: var(--serif); font-size: 26px; line-height: 1.4; }
.tagline .muted { color: var(--muted); }

.computing { display: flex; align-items: center; justify-content: center; gap: 18px; }
.pill {
  display: inline-block;
  background: var(--guide); color: var(--paper);
  border-radius: 999px; padding: 7px 16px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.14em;
  transform: rotate(-2deg);
}

.stage {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  gap: 36px; width: 100%;
}

.engaging-stack { flex-direction: column; align-items: center; gap: 36px; width: 100%; }
.result-stack { flex-direction: column; align-items: center; gap: 40px; width: 100%; }
.drive.is-record { justify-content: flex-start; gap: 36px; padding-top: 48px; }
.drive.is-about { justify-content: flex-start; gap: 40px; padding-top: 64px; }

/* ---- the button ---- */
.engage {
  position: relative;
  width: var(--button); height: var(--button);
  border-radius: 50%; border: 0;
  background: var(--red); color: var(--on-red);
  box-shadow: 0 var(--drop) 0 var(--red-dn);
  font-weight: 700; font-size: 30px; letter-spacing: 0.22em; padding-left: 0.22em;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
  -webkit-tap-highlight-color: transparent;
}
.engage:hover { background: var(--red-dn); box-shadow: 0 var(--drop) 0 var(--red-deep); }
.engage:active, .engage.is-pressed {
  transform: translateY(6px);
  box-shadow: 0 2px 0 var(--red-deep);
  background: var(--red-dn);
}
.engage:focus-visible { outline: 2px solid var(--ink); outline-offset: 6px; }
.engage[disabled] { background: var(--disabled); color: var(--muted); box-shadow: none; transform: none; cursor: not-allowed; }
.engage.is-small { --button: 240px; font-size: 22px; letter-spacing: 0.2em; }
.engage.is-small .engage-label { opacity: 0.85; }

.button-wrap { position: relative; }
.tag {
  position: absolute;
  border: 1.5px solid var(--guide); color: var(--guide); background: var(--card);
  padding: 6px 10px; font-size: 11px; font-weight: 700; letter-spacing: 0.1em;
  white-space: nowrap;
}
.tag.warn { top: 26px; right: -186px; transform: rotate(3deg); }
.tag .dark-only { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tag .light-only { display: none; }
  :root:not([data-theme="light"]) .tag .dark-only { display: inline; }
  :root:not([data-theme="light"]) .tag.warn { right: -214px; }
}
:root[data-theme="dark"] .tag .light-only { display: none; }
:root[data-theme="dark"] .tag .dark-only { display: inline; }
.marginalia {
  position: absolute; bottom: 34px; left: -190px; width: 160px;
  text-align: right; font-size: 15px; line-height: 1.4;
  transform: rotate(-4deg);
}

/* ---- engaging ---- */
.figure {
  font-family: var(--mono); font-variant-numeric: tabular-nums;
  font-size: 76px; line-height: 1; text-align: center;
  margin: 0;
}
.figure.is-static { color: var(--muted); font-size: 44px; }
.progress { width: 560px; max-width: 100%; height: 2px; background: var(--line); position: relative; }
.progress > i { position: absolute; left: 0; top: 0; height: 2px; width: 0; background: var(--ink); transition: width 400ms linear; }
.status { margin: 0; font-family: var(--serif); font-style: italic; font-size: 19px; color: var(--guide); min-height: 1.5em; }
.reduced-copy { max-width: 560px; text-align: center; font-family: var(--serif); font-size: 19px; line-height: 1.5; margin: 0; }
.ticker {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 28px;
  font-family: var(--mono); font-size: 12px; color: var(--muted); margin: 0; padding: 0; list-style: none;
}
.bottom-engaging { display: flex; flex-direction: column; align-items: center; gap: 24px; }

/* ---- the card ---- */
.card {
  width: 720px; max-width: 100%;
  background: var(--card); border: 1px solid var(--line);
  padding: 48px 56px;
  display: flex; flex-direction: column; gap: 32px;
  transform: rotate(-0.4deg);
}
.card.is-calc { transform: rotate(0.4deg); }
.card.is-compact { width: 680px; padding: 40px 48px; gap: 24px; transform: none; }
.card.is-note { width: 480px; padding: 40px 44px; gap: 22px; transform: none; }
.card-head { display: flex; justify-content: space-between; gap: 16px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--muted); }
.card-head span:first-child { white-space: nowrap; }
.card-head span + span { overflow-wrap: anywhere; text-align: right; }
.event { margin: 0; font-family: var(--serif); font-size: 27px; line-height: 1.4; }
.event-note { margin: 6px 0 0; font-size: 13px; color: var(--muted); }
.prob { display: flex; flex-direction: column; gap: 8px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 24px 0; }
.prob-figure { margin: 0; font-family: var(--mono); font-size: 52px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.prob-figure sup { font-size: 0.5em; vertical-align: super; }
.prob-figure .against { font-size: 0.5em; color: var(--muted); }
.factors { display: flex; flex-direction: column; gap: 10px; }
.factors ul { list-style: none; margin: 0; padding: 0; }
.factors li { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.factors li:last-child { border-bottom: 0; }
.factors li::before { content: "✳ "; color: var(--guide); }
.factors li > span:first-child { flex: 1; }
.factors .weight { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.comparison { margin: 0; font-family: var(--serif); font-style: italic; font-size: 17px; color: var(--muted); }
.filed { margin: 0; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; color: var(--muted); text-transform: uppercase; }
.card-foot { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.card-foot > .stamp { margin-left: auto; }
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.btn-again {
  border: 0; border-radius: 999px;
  background: var(--red); color: var(--on-red);
  box-shadow: 0 4px 0 var(--red-dn);
  padding: 13px 26px; font-size: 13px; font-weight: 700; letter-spacing: 0.1em;
  white-space: nowrap; text-transform: uppercase;
  transition: transform 100ms ease, box-shadow 100ms ease;
}
.btn-again:hover { background: var(--red-dn); }
.btn-again:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--red-dn); }
.btn-quiet { background: transparent; border: 1px solid var(--line); padding: 13px 18px; font-size: 13px; font-weight: 600; }
.btn-quiet:hover { border-color: var(--ink); }
.stamp {
  display: inline-block; align-self: flex-start;
  border: 2px solid var(--red); color: var(--red);
  padding: 8px 14px; font-size: 13px; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; transform: rotate(-2.5deg);
}
.stamp.is-tilt { transform: rotate(3deg); }
.stamp.is-guide { border: 1.5px solid var(--guide); color: var(--guide); transform: rotate(-3deg); }
.note-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.note-body { margin: 0; font-size: 14px; line-height: 1.6; color: var(--muted); }
.countdown { display: flex; align-items: center; gap: 16px; }
.countdown .mono { font-size: 13px; color: var(--muted); }

/* ---- input + footer ---- */
.bottom { display: flex; flex-direction: column; align-items: center; gap: 40px; width: 100%; }
.calc { display: flex; align-items: stretch; width: 100%; max-width: 640px; justify-content: center; }
.calc input {
  width: 520px; max-width: 100%;
  padding: 13px 16px; border: 1px solid var(--line); border-right: 0;
  background: var(--card); color: var(--ink);
  font-family: var(--sans); font-size: 15px; outline: none;
}
.calc input:focus { border-color: var(--ink); }
.calc input::placeholder { color: var(--muted); }
.btn-calc {
  background: transparent; border: 1px solid var(--ink);
  padding: 13px 22px; font-size: 13px; font-weight: 600; letter-spacing: 0.08em;
  white-space: nowrap;
}
.btn-calc:hover { background: var(--ink); color: var(--paper); }
.foot { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; font-size: 12px; color: var(--muted); margin: 0; }
.foot .aside { font-size: 13px; }
.foot a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.foot a:hover { color: var(--ink); }

/* ---- shared page ---- */
.record { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.record p { margin: 0; }
.record .when { font-family: var(--serif); font-size: 20px; }
.record .witness { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--muted); text-transform: uppercase; }
.invite { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.invite p { margin: 0; font-family: var(--serif); font-size: 17px; color: var(--muted); }
.engage.is-invite { --button: 180px; font-size: 17px; letter-spacing: 0.18em; --drop: 6px; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }

/* ---- about ---- */
.about { width: 560px; max-width: 100%; font-family: var(--serif); font-size: 18px; line-height: 1.6; }
.about p { margin: 0 0 1em; }
.about .label { margin-bottom: 12px; }

/* ---- state visibility ---- */
[data-state] .only-idle, [data-state] .only-engaging, [data-state] .only-result { display: none; }
[data-state="idle"] .only-idle { display: flex; }
[data-state="engaging"] .only-engaging { display: flex; }
[data-state="result"] .only-result, [data-state="result"] .only-idle.keep { display: flex; }
[data-state="result"] .ghost, [data-state="engaging"] .ghost { display: none; }
[data-state="idle"] .tagline.keep, [data-state="result"] .tagline.keep { display: block; }

/* ---- motion ---- */
.card { animation: arrive 420ms ease-out both; }
@keyframes arrive { from { opacity: 0; transform: translateY(10px) rotate(-0.4deg); } }
.card.is-calc { animation-name: arrive-calc; }
@keyframes arrive-calc { from { opacity: 0; transform: translateY(10px) rotate(0.4deg); } }
@media (prefers-reduced-motion: reduce) {
  .card, .engage, .btn-again, .progress > i { animation: none; transition: none; }
}

/* ---- phone ---- */
@media (max-width: 720px) {
  :root { --button: 240px; }
  .drive { padding: 64px 16px 24px; gap: 28px; }
  .ghost { display: none; }
  .tagline { font-size: 20px; }
  .engage { font-size: 23px; letter-spacing: 0.2em; box-shadow: 0 7px 0 var(--red-dn); }
  .engage.is-small { --button: 190px; font-size: 18px; }
  .tag.warn { top: -16px; right: -28px; transform: rotate(4deg); font-size: 9px; padding: 5px 8px; }
  .marginalia { display: none; }
  .figure { font-size: 30px; line-height: 1.25; }
  .figure.is-static { font-size: 28px; }
  .progress { width: 220px; }
  .status { font-size: 16px; }
  .ticker { display: none; }
  .computing { flex-direction: column; gap: 12px; }
  .card, .card.is-compact, .card.is-note { padding: 24px 20px; gap: 20px; transform: none; }
  .card-head { font-size: 10px; }
  .card-head span:first-child { white-space: normal; }
  .card:not(.is-compact) .card-head span + span { white-space: nowrap; }
  .event { font-size: 20px; line-height: 1.45; }
  .prob { padding: 16px 0; }
  .prob-figure { font-size: 30px; line-height: 1.15; }
  .factors li { font-size: 13px; padding: 7px 0; }
  .factors .weight { display: none; }
  .comparison { font-size: 14px; }
  .stamp { font-size: 11px; padding: 6px 10px; }
  .card-foot { flex-direction: column-reverse; align-items: stretch; }
  .actions { flex-direction: column; align-items: stretch; }
  .btn-again { text-align: center; padding: 15px 0; }
  .actions .pair { display: flex; gap: 10px; }
  .actions .pair .btn-quiet { flex: 1; text-align: center; }
  .calc { flex-direction: column; align-items: stretch; gap: 10px; }
  .calc input { width: 100%; border-right: 1px solid var(--line); padding: 14px; font-size: 14px; }
  .btn-calc { align-self: flex-end; padding: 12px 20px; font-size: 12px; }
  .foot .footnote { display: none; }
  .record .when { font-size: 16px; }
  .engage.is-invite { --button: 150px; font-size: 15px; }
}