:root {
  --paper: #f1efe8;
  --ink: #151817;
  --muted: #6f716d;
  --line: #c9c8c0;
  --night: #141817;
  --night-muted: #969c98;
  --acid: #d8ff52;
  --orange: #ff6b3d;
  --blue: #58a6ff;
  --violet: #b98cff;
  --wrap: min(1160px, calc(100vw - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Manrope", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, input { font: inherit; }
.wrap { width: var(--wrap); margin-inline: auto; }
.site-header {
  width: var(--wrap);
  height: 88px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  font-family: "DM Mono", monospace;
  font-size: 11px;
  letter-spacing: .08em;
}
.wordmark { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.wordmark-dot { width: 10px; height: 10px; background: var(--orange); border-radius: 50%; }
.header-link { color: var(--muted); text-underline-offset: 4px; }
.header-nav { display: flex; gap: 24px; }
.hero { min-height: calc(100vh - 88px); padding: 15vh 0 60px; position: relative; }
.eyebrow {
  margin: 0 0 24px;
  color: var(--muted);
  font: 500 11px/1.4 "DM Mono", monospace;
  letter-spacing: .14em;
}
h1, h2 { margin: 0; font-family: "Newsreader", serif; font-weight: 400; letter-spacing: -.045em; }
h1 { max-width: 1050px; font-size: clamp(60px, 8.3vw, 124px); line-height: .87; }
h1 em, h2 em { color: var(--orange); font-weight: 400; }
.hero-copy {
  width: min(540px, 100%);
  margin: 56px 0 0 auto;
  font-size: 18px;
  line-height: 1.65;
}
.scroll-cue {
  position: absolute;
  bottom: 48px;
  display: flex;
  gap: 18px;
  align-items: center;
  color: var(--muted);
  font: 12px "DM Mono", monospace;
  text-decoration: none;
}
.scroll-cue span { color: var(--ink); font-size: 18px; }
.dark-section { color: var(--paper); background: var(--night); }
.builder { padding: 120px 0 130px; border-bottom: 1px solid #303532; }
.builder-heading { display: grid; grid-template-columns: 1.2fr .8fr; gap: 100px; align-items: end; margin-bottom: 80px; }
.builder-heading > p { max-width: 460px; margin: 0 0 8px; color: var(--night-muted); font-size: 14px; line-height: 1.75; }
.builder form { border-top: 1px solid #3a403d; }
.builder fieldset { min-width: 0; margin: 0; padding: 42px 0; border: 0; border-bottom: 1px solid #3a403d; }
.builder legend { width: 100%; margin: 0 0 28px; padding: 0; color: var(--night-muted); font: 500 10px "DM Mono", monospace; letter-spacing: .12em; }
.profile-fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px 18px; }
.profile-fields legend { grid-column: 1 / -1; }
.builder label { display: flex; flex-direction: column; gap: 10px; color: var(--night-muted); font: 9px "DM Mono", monospace; letter-spacing: .04em; }
.builder input {
  width: 100%;
  min-width: 0;
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid #555c58;
  border-radius: 0;
  outline: none;
  color: var(--paper);
  background: transparent;
  font: 20px "Newsreader", serif;
}
.builder input:focus { border-color: var(--acid); }
.people-form-heading { display: flex; align-items: center; justify-content: space-between; margin: -10px 0 12px; color: var(--night-muted); font-size: 11px; }
.text-button { padding: 8px 0; border: 0; color: var(--acid); background: transparent; cursor: pointer; font: 10px "DM Mono", monospace; }
.field-help { max-width: 690px; margin: 0 0 30px; color: var(--night-muted); font-size: 11px; line-height: 1.6; }
.person-form-row { display: grid; grid-template-columns: 38px 1.5fr .55fr .8fr 32px; gap: 18px; align-items: end; padding: 22px 0; border-top: 1px solid #303532; }
.person-form-number { align-self: center; color: var(--person-color); font: 11px "DM Mono", monospace; }
.remove-person { width: 30px; height: 38px; border: 0; color: var(--night-muted); background: transparent; cursor: pointer; font-size: 22px; }
.remove-person:hover { color: var(--orange); }
.remove-person:disabled { opacity: .2; cursor: not-allowed; }
.person-refine { grid-column: 2 / -1; margin-top: 2px; color: var(--night-muted); }
.person-refine summary, .global-refine summary { width: max-content; cursor: pointer; list-style: none; font: 9px "DM Mono", monospace; text-decoration: underline; text-underline-offset: 4px; }
.person-refine summary::before, .global-refine summary::before { content: "+ "; }
.person-refine[open] summary::before, .global-refine[open] summary::before { content: "− "; }
.person-refine > div { display: flex; gap: 18px; align-items: end; margin-top: 18px; }
.person-refine label { width: 170px; }
.person-refine p { margin: 0 0 14px; font-size: 10px; }
.global-refine { padding: 28px 0; border-bottom: 1px solid #3a403d; color: var(--night-muted); }
.refine-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 24px; }
.form-actions { display: flex; align-items: center; justify-content: space-between; padding-top: 32px; }
.form-actions p { margin: 0; color: var(--night-muted); font-size: 10px; }
.generate-button { display: flex; align-items: center; gap: 60px; padding: 18px 20px; border: 0; color: var(--ink); background: var(--acid); cursor: pointer; font: 500 11px "DM Mono", monospace; }
.generate-button span { font-size: 18px; }
.chapter { padding: 120px 0; }
.chapter .wrap { display: grid; grid-template-columns: 80px 1fr; }
.chapter-number { color: var(--muted); font: 11px "DM Mono", monospace; }
.chapter-heading { grid-column: 2; }
h2 { font-size: clamp(52px, 7vw, 98px); line-height: .95; }
.dark-section .eyebrow { color: var(--night-muted); }
.history-visual { grid-column: 2; margin-top: 100px; }
.history-label { display: inline-flex; flex-direction: column; margin-bottom: 18px; }
.history-label strong { font: 500 12px "DM Mono", monospace; }
.history-label span { color: var(--night-muted); font-size: 13px; margin-top: 6px; }
.label-home { width: 70.6%; }
.history-line { display: flex; height: 12px; position: relative; }
.history-home { width: 70.6%; background: var(--acid); }
.history-away { flex: 1; background: #343a37; }
.move-marker {
  position: absolute;
  top: 34px;
  left: 70.6%;
  transform: translateX(-50%);
  white-space: nowrap;
  color: var(--night-muted);
  font: 10px "DM Mono", monospace;
}
.move-marker i { display: block; width: 1px; height: 24px; margin: -34px auto 8px; background: var(--paper); }
.history-scale { display: flex; justify-content: space-between; color: #6f7571; margin-top: 20px; font: 10px "DM Mono", monospace; }
.history-caption { grid-column: 2; display: grid; grid-template-columns: 1.6fr .7fr; gap: 80px; margin-top: 120px; }
.large-copy { margin: 0; font: 34px/1.32 "Newsreader", serif; }
.large-copy strong { color: var(--acid); font-weight: 400; }
.side-note { color: var(--night-muted); font-size: 12px; line-height: 1.7; }
.calculator { padding: 120px 0 140px; }
.calculator-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 80px; margin: 0 0 90px 80px; align-items: end; }
.calculator-intro > p { color: var(--muted); max-width: 440px; margin: 0 0 8px; line-height: 1.75; }
.controls {
  display: grid;
  grid-template-columns: 1fr auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 70px;
}
.control-group { min-width: 0; padding: 26px 24px; border-right: 1px solid var(--line); }
.control-group:first-child { padding-left: 0; }
.control-group:last-child { border-right: 0; }
.edit-scenario { align-self: center; padding: 18px 0 18px 30px; color: var(--muted); font: 10px "DM Mono", monospace; text-underline-offset: 4px; }
.control-label { display: flex; justify-content: space-between; font: 500 10px "DM Mono", monospace; letter-spacing: .1em; }
.control-label output { color: var(--orange); font-size: 13px; }
.segmented { display: flex; gap: 6px; margin-top: 16px; }
.segmented button {
  padding: 9px 10px;
  color: var(--muted);
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  font-size: 10px;
}
.segmented button.active { color: var(--ink); border-color: var(--ink); background: var(--acid); }
.control-hint { display: block; margin-top: 10px; color: var(--muted); font-size: 10px; }
input[type="range"] { width: 100%; margin: 24px 0 8px; accent-color: var(--ink); }
.range-scale { display: flex; justify-content: space-between; color: var(--muted); font: 9px "DM Mono", monospace; }
.lifetime-view { margin: 100px 0 120px; }
.lifetime-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 80px; align-items: end; margin-bottom: 50px; }
.lifetime-intro h3, .yearly-heading h3 { margin: 0; font: 48px/1.05 "Newsreader", serif; letter-spacing: -.035em; }
.lifetime-explainer { max-width: 430px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.lifetime-explainer p { margin: 0; }
.lifetime-explainer strong { color: var(--ink); }
.lifetime-legend { display: flex; gap: 24px; margin-top: 20px; font: 9px "DM Mono", monospace; }
.lifetime-legend span { display: flex; align-items: center; gap: 7px; }
.lifetime-legend i { width: 10px; height: 10px; border-radius: 1px; }
.used-key { background: var(--orange); opacity: .55; }
.left-key { background: var(--ink); }
.lifetime-grids { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 18px; }
.lifetime-person { padding: 26px; border: 1px solid var(--line); }
.lifetime-person-heading { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 22px; }
.lifetime-person-heading h4 { margin: 0; font: 30px "Newsreader", serif; }
.lifetime-person-heading strong {
  padding: 7px 9px;
  color: var(--ink);
  background: color-mix(in srgb, var(--person-color) 28%, transparent);
  border-bottom: 3px solid var(--person-color);
  font: 24px "Newsreader", serif;
}
.lifetime-person-heading strong span { color: #343835; font: 500 9px "DM Mono", monospace; }
.lifetime-grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 5px; }
.lifetime-square { aspect-ratio: 1; border-radius: 1px; }
.lifetime-square.used { background: var(--orange); opacity: .5; }
.lifetime-square.left { background: var(--person-color); box-shadow: 0 0 0 1px color-mix(in srgb, var(--person-color), black 12%); }
.lifetime-totals { display: flex; flex-wrap: wrap; gap: 10px 16px; margin: 20px 0 0; color: #343835; font: 500 11px/1.5 "DM Mono", monospace; }
.lifetime-totals span { display: flex; align-items: center; gap: 6px; }
.lifetime-totals i { width: 9px; height: 9px; flex: 0 0 auto; border-radius: 1px; }
.used-total i { background: var(--orange); opacity: .7; }
.remain-total { color: var(--ink); }
.remain-total i { background: var(--person-color); box-shadow: 0 0 0 1px color-mix(in srgb, var(--person-color), black 18%); }
.yearly-heading { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 30px; align-items: end; }
.yearly-heading .eyebrow { grid-column: 1 / -1; margin-bottom: 12px; }
.yearly-heading > p:last-child { margin: 0; color: var(--muted); font-size: 12px; text-align: right; }
.people { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 18px; }
.person-card { min-width: 0; border: 1px solid var(--line); background: rgba(255,255,255,.17); }
.person-top { padding: 26px; min-height: 220px; }
.person-kicker { display: flex; justify-content: space-between; font: 10px "DM Mono", monospace; color: var(--muted); }
.person-name { margin: 30px 0 4px; font: 48px/1 "Newsreader", serif; }
.person-age { color: var(--muted); font-size: 12px; }
.person-number { display: flex; align-items: baseline; gap: 8px; margin-top: 30px; }
.person-number strong { font: 500 52px/1 "Newsreader", serif; }
.person-number span { color: var(--muted); font: 10px "DM Mono", monospace; }
.week-visual { padding: 20px 26px 22px; background: var(--ink); }
.week-key, .week-legend {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #8e9591;
  font: 8px "DM Mono", monospace;
  letter-spacing: .06em;
}
.week-key strong { color: var(--paper); font-weight: 400; }
.day-field {
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: 6px;
  min-height: 0;
  padding: 18px 0;
  align-content: start;
}
.day { aspect-ratio: 1; border-radius: 2px; background: #363c39; }
.day.lit { background: var(--person-color); }
.week-legend { justify-content: flex-start; gap: 18px; letter-spacing: 0; }
.week-legend span { display: flex; align-items: center; gap: 6px; }
.week-legend strong { color: var(--paper); font-weight: 500; }
.legend-swatch { width: 8px; height: 8px; border-radius: 1px; background: #363c39; }
.legend-swatch.lit { background: var(--person-color); }
.person-summary { padding: 24px 26px 28px; }
.summary-line { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 11px; }
.summary-line span { color: var(--muted); }
.summary-line strong { font-family: "DM Mono", monospace; font-weight: 500; }
.tail-meter { margin-top: 22px; }
.meter-label { display: flex; justify-content: space-between; margin-bottom: 8px; font: 9px "DM Mono", monospace; color: var(--muted); }
.meter-track { height: 7px; background: #d7d5cc; }
.meter-fill { height: 100%; background: var(--person-color); }
.comparison { padding: 120px 0; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
.comparison h2 { font-size: clamp(50px, 6vw, 84px); }
.comparison .chapter-number { margin-bottom: 70px; }
.stack-list { display: flex; flex-direction: column; justify-content: flex-end; }
.stack-item { padding: 27px 0; border-top: 1px solid #3a403d; }
.stack-meta { display: flex; justify-content: space-between; margin-bottom: 14px; }
.stack-meta strong { font: 28px "Newsreader", serif; }
.stack-meta span { color: var(--night-muted); font: 10px "DM Mono", monospace; }
.stack-bar { height: 14px; background: #303532; }
.stack-bar i { display: block; height: 100%; background: var(--person-color); transition: width .4s ease; }
.stack-note { margin: 12px 0 0; color: var(--night-muted); font-size: 11px; }
.possibility { display: grid; grid-template-columns: 1.1fr .7fr; gap: 120px; padding-top: 130px; padding-bottom: 130px; align-items: center; }
.possibility-copy > p:last-child { max-width: 590px; color: var(--muted); line-height: 1.8; margin-top: 42px; }
.impact-card { padding: 40px; color: var(--paper); background: var(--orange); transform: rotate(1.5deg); box-shadow: 12px 12px 0 var(--ink); }
.impact-card p { font: 10px "DM Mono", monospace; letter-spacing: .1em; }
.impact-card strong { display: block; margin: 36px 0 8px; font: 72px/1 "Newsreader", serif; }
.impact-card span { display: block; font-size: 13px; line-height: 1.5; }
.impact-card button { margin-top: 40px; padding: 13px 17px; border: 1px solid var(--paper); color: var(--paper); background: transparent; cursor: pointer; font: 10px "DM Mono", monospace; }
.method { padding: 120px 0; background: #dedbd1; }
.method-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
.method h2 { font-size: clamp(50px, 6vw, 84px); }
.method-copy > p { margin: 0 0 24px; line-height: 1.75; font-size: 14px; }
.assumption-list { margin: 50px 0; }
.assumption-list div { display: flex; justify-content: space-between; border-top: 1px solid #b9b6ad; padding: 13px 0; font-size: 12px; }
.assumption-list dt { color: var(--muted); }
.assumption-list dd { margin: 0; font-family: "DM Mono", monospace; }
.method-copy .source { color: var(--muted); font-size: 11px; }
.source a { text-underline-offset: 3px; }
footer { color: var(--paper); background: var(--night); }
footer .wrap { min-height: 190px; display: flex; align-items: center; justify-content: space-between; }
footer p { margin: 0; font: 40px "Newsreader", serif; }
footer a { color: var(--night-muted); font: 10px "DM Mono", monospace; }
.footer-links { display: flex; align-items: flex-end; flex-direction: column; gap: 14px; }

@media (max-width: 850px) {
  :root { --wrap: min(100% - 30px, 680px); }
  .site-header { height: 70px; }
  .header-nav .header-link:last-child { display: none; }
  .hero { min-height: 850px; padding-top: 120px; }
  h1 { font-size: clamp(57px, 17vw, 92px); }
  .hero-copy { margin: 50px 0 0; font-size: 16px; }
  .builder { padding: 90px 0; }
  .builder-heading { grid-template-columns: 1fr; gap: 35px; margin-bottom: 60px; }
  .profile-fields { grid-template-columns: 1fr 1fr; }
  .person-form-row { grid-template-columns: 28px 1fr 1fr 28px; gap: 16px 12px; padding: 26px 0; }
  .person-form-row .person-form-number { grid-row: 1 / 3; }
  .person-form-row label:first-of-type { grid-column: 2 / 4; }
  .person-form-row .remove-person { grid-column: 4; grid-row: 1; }
  .person-form-row label:nth-of-type(2) { grid-column: 2; }
  .person-form-row label:nth-of-type(3) { grid-column: 3; }
  .person-refine { grid-column: 2 / 4; }
  .person-refine > div { align-items: flex-start; flex-direction: column; }
  .person-refine label { width: 100%; }
  .refine-fields { grid-template-columns: 1fr; }
  .form-actions { align-items: flex-start; flex-direction: column; gap: 24px; }
  .generate-button { width: 100%; justify-content: space-between; }
  .chapter { padding: 90px 0; }
  .chapter .wrap { grid-template-columns: 1fr; }
  .chapter-number, .chapter-heading, .history-visual, .history-caption { grid-column: 1; }
  .chapter-number { margin-bottom: 32px; }
  h2 { font-size: 58px; }
  .history-visual { margin-top: 70px; }
  .history-caption { grid-template-columns: 1fr; gap: 25px; margin-top: 90px; }
  .large-copy { font-size: 30px; }
  .calculator { padding: 90px 0; }
  .calculator-intro { grid-template-columns: 1fr; margin: 0 0 60px; gap: 35px; }
  .controls { grid-template-columns: 1fr; }
  .control-group, .control-group:first-child { padding: 22px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .control-group:last-child { border-bottom: 0; }
  .edit-scenario { padding: 20px 0; }
  .segmented { overflow-x: auto; }
  .segmented button { flex: 1; white-space: nowrap; }
  .lifetime-view { margin: 75px 0 90px; }
  .lifetime-intro { grid-template-columns: 1fr; gap: 28px; margin-bottom: 35px; }
  .lifetime-intro h3, .yearly-heading h3 { font-size: 39px; }
  .lifetime-grids { grid-template-columns: 1fr; }
  .lifetime-person { padding: 22px; }
  .lifetime-grid { gap: 6px; }
  .yearly-heading { grid-template-columns: 1fr; gap: 14px; }
  .yearly-heading > p:last-child { text-align: left; }
  .people { grid-template-columns: 1fr; }
  .day-field { gap: 7px; }
  .comparison { padding: 90px 0; }
  .comparison-grid { grid-template-columns: 1fr; gap: 70px; }
  .possibility { grid-template-columns: 1fr; gap: 65px; padding-top: 90px; padding-bottom: 100px; }
  .impact-card { margin: 0 8px; padding: 32px; }
  .impact-card strong { font-size: 62px; }
  .method { padding: 90px 0; }
  .method-grid { grid-template-columns: 1fr; gap: 60px; }
  footer .wrap { min-height: 160px; }
  footer p { font-size: 30px; }
  .footer-links { max-width: 180px; text-align: right; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}