:root {
  --paper: #efe9dd;
  --paper-2: #e5ddcd;
  --ink: #161412;
  --ink-2: #2a2622;
  --muted: #5e564c;
  --rule: #161412;
  --red: #c7361f;
  --red-ink: #a52a16;
  --on-ink: #efe9dd;
  --on-ink-muted: #b8ae9f;

  --f-display: 'Fraunces', Georgia, serif;
  --f-body: 'Newsreader', Georgia, serif;
  --f-mono: 'Space Mono', ui-monospace, monospace;

  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.85rem + 0.15vw, 0.9375rem);
  --text-base: clamp(1.0625rem, 1rem + 0.2vw, 1.1875rem);
  --text-lg: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --text-xl: clamp(1.75rem, 1.3rem + 1.8vw, 2.75rem);
  --text-hero: clamp(3.5rem, 1rem + 11vw, 11rem);

  --gutter: clamp(1.25rem, 4vw, 3rem);
  --max: 1240px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; scroll-padding-top: 4rem; }
body {
  font-family: var(--f-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  background-image: radial-gradient(rgba(22,20,18,.035) 1px, transparent 1px);
  background-size: 3px 3px;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; color: inherit; }
h1, h2, h3 { font-family: var(--f-display); line-height: 1.08; text-wrap: balance; font-weight: 600; }
h2 { font-size: var(--text-xl); letter-spacing: -0.015em; }
h3 { font-size: var(--text-lg); letter-spacing: -0.01em; }
p { max-width: 64ch; text-wrap: pretty; }
:focus-visible { outline: 3px solid var(--red); outline-offset: 3px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 10; }
.skip:focus { left: 1rem; }

.wrap { max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }
.label, .box__tag, .tile__type, .pill, .toc span {
  font-family: var(--f-mono);
  font-size: var(--text-xs);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.small { font-size: var(--text-sm); color: var(--muted); }

/* Masthead */
.masthead {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}
.masthead__row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 3.25rem; }
.masthead nav { display: flex; gap: clamp(.75rem, 2vw, 1.75rem); align-items: center; }
.masthead nav a { font-family: var(--f-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .08em; text-decoration: none; }
.masthead nav a:hover { color: var(--red-ink); }
.masthead .label, .nav-cta { white-space: nowrap; }
.nav-cta { background: var(--ink); color: var(--paper) !important; padding: .45rem .8rem; }
.nav-cta:hover { background: var(--red); }

/* Cover */
.cover { padding-block: clamp(1.5rem, 4vw, 3rem) clamp(3rem, 7vw, 6rem); }
.nameplate { border-bottom: 6px solid var(--ink); padding-bottom: .5rem; margin-bottom: 1.25rem; position: relative; }
.nameplate__the {
  font-family: var(--f-display); font-style: italic; font-weight: 500;
  font-size: clamp(1.25rem, .8rem + 2vw, 2.5rem); color: var(--red);
  display: block; margin-bottom: -.15em; padding-left: .2em;
}
.nameplate__word {
  font-size: clamp(3.25rem, 0.8rem + 10vw, 10rem); font-weight: 800; line-height: .9;
  letter-spacing: -0.02em; word-spacing: 0.08em; font-variation-settings: 'opsz' 144; padding-bottom: .18em;
  text-transform: none;
}

.box { border: 1.5px solid var(--ink); background: var(--paper); padding: clamp(1rem, 2vw, 1.5rem); position: relative; }
.box__tag { display: inline-block; background: var(--ink); color: var(--paper); padding: .2rem .5rem; margin-bottom: .9rem; }

.cover__grid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(12, 1fr);
  grid-template-areas:
    "lead lead lead lead lead lead lead lead status status status status"
    "lead lead lead lead lead lead lead lead quote quote quote quote"
    "lead lead lead lead lead lead lead lead index index index index";
}
.box--lead { grid-area: lead; display: flex; flex-direction: column; justify-content: space-between; gap: 2rem; background: var(--ink); color: var(--on-ink); border-color: var(--ink); }
.box--lead .box__tag { background: var(--red); color: #fff; align-self: flex-start; }
.cover__art { flex: 1; min-height: 9rem; display: grid; grid-template-columns: 3fr 2fr 2fr; grid-template-rows: 1fr 1fr .6fr; gap: 8px; }
.cover__art span { border: 1px solid rgba(239,233,221,.28); font-family: var(--f-mono); font-size: .65rem; letter-spacing: .1em; text-transform: uppercase; color: rgba(239,233,221,.5); padding: .4rem .5rem; }
.cover__art .a1 { grid-row: span 3; background: repeating-linear-gradient(180deg, transparent 0 9px, rgba(239,233,221,.08) 9px 10px); }
.cover__art .a3 { border-color: var(--red); color: var(--red); }
.cover__art .a6 { grid-column: 2 / 4; background: rgba(239,233,221,.08); }
.cover__head { font-family: var(--f-display); font-size: clamp(2rem, 1.2rem + 3.2vw, 4.25rem); line-height: 1; letter-spacing: -0.025em; font-weight: 600; max-width: 16ch; margin-bottom: 1rem; }
.cover__deck { color: var(--on-ink-muted); font-size: var(--text-lg); line-height: 1.45; max-width: 48ch; margin-bottom: 1.5rem; }
.box--status { grid-area: status; }
.status__big { font-family: var(--f-display); font-size: var(--text-xl); font-style: italic; line-height: 1; margin-bottom: .5rem; color: var(--red-ink); }
.box--quote { grid-area: quote; background: var(--red); color: #fff; border-color: var(--red); display: flex; flex-direction: column; justify-content: space-between; gap: 1rem; }
.box--quote .label { color: rgba(255,255,255,.85); }
.quote { font-family: var(--f-display); font-style: italic; font-size: clamp(1.5rem, 1rem + 1.6vw, 2.25rem); line-height: 1.05; }
.box--index { grid-area: index; }
.toc { list-style: none; }
.toc li + li { border-top: 1px solid rgba(22,20,18,.2); }
.toc a { display: flex; gap: .75rem; padding: .45rem 0; text-decoration: none; font-size: var(--text-sm); }
.toc a:hover { color: var(--red-ink); }
.toc span { color: var(--red-ink); padding-top: .15em; }

.btn {
  display: inline-block; align-self: flex-start;
  font-family: var(--f-mono); font-size: var(--text-sm); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; text-decoration: none;
  background: var(--paper); color: var(--ink); padding: .9rem 1.25rem;
  border: 1.5px solid var(--paper); transition: background .15s, color .15s;
}
.btn:hover { background: var(--red); border-color: var(--red); color: #fff; }
.btn--light { background: var(--paper); }

/* Sections */
.section { padding-block: clamp(4rem, 9vw, 8rem); }
.section--ink { background: var(--ink); color: var(--on-ink); }
.section--ink .label { color: var(--on-ink-muted); }
.section--paper2 { background: var(--paper-2); border-block: 1.5px solid var(--ink); }
.section__head { display: grid; gap: 1rem; margin-bottom: clamp(2rem, 4vw, 3.5rem); max-width: 52rem; }
.section__head p { color: var(--muted); }
.section--ink .section__head p { color: var(--on-ink-muted); }
.label { color: var(--red-ink); }

.spread { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(2rem, 5vw, 5rem); }
#idea { padding-top: 0; }
#idea::before { content: ''; grid-column: 1 / -1; height: 1.5px; background: var(--ink); }
.spread__label { display: grid; gap: 1rem; align-content: start; }
.spread__body { columns: 2; column-gap: 2.5rem; }
.spread__body p { margin-bottom: 1.1rem; break-inside: avoid-column; }
.dropcap::first-letter {
  font-family: var(--f-display); font-weight: 800; float: left;
  font-size: 4.2em; line-height: .8; padding: .08em .1em 0 0; color: var(--red);
}

/* Box grid */
.boxgrid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(12rem, auto); gap: 12px; }
.tile { border: 1.5px solid var(--on-ink-muted); padding: 1.25rem; display: flex; flex-direction: column; gap: .5rem; transition: border-color .2s, transform .2s; }
.tile:hover { border-color: var(--on-ink); transform: translateY(-2px); }
.tile p { color: var(--on-ink-muted); font-size: var(--text-sm); }
.tile__type { color: var(--red); margin-bottom: auto; padding-bottom: 1.5rem; }
.tile--feature { grid-column: span 2; grid-row: span 2; justify-content: flex-end; background: var(--on-ink); color: var(--ink); border-color: var(--on-ink); }
.tile--feature h3 { font-size: var(--text-xl); }
.tile--feature p { color: var(--muted); font-size: var(--text-base); }
.tile--feature .tile__type { color: var(--red-ink); }
.tile--dossier { grid-column: span 2; }
.tile--wide { grid-column: span 2; }
.tile--accent { background: var(--red); border-color: var(--red); }
.tile--accent .tile__type, .tile--accent p { color: #fff; }

/* Modes */
.preview-tag { display: block; margin-bottom: .6rem; }
.modes { display: flex; flex-wrap: wrap; gap: 0; border: 1.5px solid var(--ink); width: fit-content; max-width: 100%; }
.mode { background: transparent; border: 0; border-right: 1.5px solid var(--ink); padding: .75rem 1.1rem; cursor: pointer; font-family: var(--f-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .08em; }
.mode:last-child { border-right: 0; }
.mode:hover { background: var(--paper-2); }
.mode.is-on { background: var(--ink); color: var(--paper); }
.modebox { border: 1.5px solid var(--ink); border-top: 0; padding: 1.5rem; max-width: 46rem; min-height: 7rem; background: var(--paper); }
.modebox .tile__type { color: var(--red-ink); display: block; padding-bottom: .5rem; }
.modebox p { font-family: var(--f-display); font-size: var(--text-lg); line-height: 1.3; }
.turns { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 3vw, 3rem); margin-top: clamp(3rem, 6vw, 5rem); border-top: 1.5px solid var(--ink); padding-top: 2rem; }
.turns h3 { margin-bottom: .5rem; }
.turns p { color: var(--muted); font-size: var(--text-sm); }

/* Algorithm */
.algo { display: grid; grid-template-columns: 5fr 6fr; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.algo__text { display: grid; gap: 1rem; }
.signals { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.signals li { font-family: var(--f-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .05em; border: 1px solid var(--ink); padding: .5rem .6rem; background: var(--paper); }
.demo__bar { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: .25rem; }
.demo__bar .box__tag { margin-bottom: .5rem; }
.demo__grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 4.5rem; grid-auto-flow: dense; gap: 6px; margin-bottom: 1.25rem; }
.dbox { border: 1.5px solid var(--ink); padding: .4rem .5rem; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; background: var(--paper-2); transition: background .2s; }
.dbox b { font-family: var(--f-display); font-weight: 600; font-size: .95rem; line-height: 1.1; }
.dbox span { font-family: var(--f-mono); font-size: .68rem; color: var(--muted); }
.dbox.s2 { background: var(--paper); }
.dbox.s4 { background: var(--ink); color: var(--paper); }
.dbox.s4 span { color: var(--on-ink-muted); }
.dbox.s4 b { font-size: 1.35rem; }
.demo__controls { display: grid; gap: .9rem; }
.demo__controls label { display: grid; grid-template-columns: 1fr auto; gap: .25rem .75rem; font-family: var(--f-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .06em; align-items: center; }
.demo__controls input[type=range] { grid-column: 1 / -1; width: 100%; accent-color: var(--red); }
.demo__controls input[type=checkbox] { grid-column: 1 / -1; width: 1.1rem; height: 1.1rem; accent-color: var(--red); }
.demo__controls label:has(input[type=checkbox]) { grid-template-columns: auto 1fr auto; }
.demo__controls label:has(input[type=checkbox]) input { grid-column: auto; order: -1; }
.demo__controls output { color: var(--red-ink); font-weight: 700; }
.demo__note { margin-top: 1rem; }

/* Roadmap */
.road { list-style: none; border-top: 1.5px solid var(--ink); }
.road__item { display: grid; grid-template-columns: 4rem 1fr auto; gap: 1.5rem; align-items: center; padding: 1.5rem 0; border-bottom: 1px solid rgba(22,20,18,.25); }
.road__n { font-family: var(--f-display); font-size: 2.75rem; font-weight: 800; line-height: 1; color: rgba(22,20,18,.25); }
.road__item.is-active .road__n { color: var(--red); }
.road__item p { color: var(--muted); font-size: var(--text-sm); margin-top: .25rem; }
.pill { border: 1px solid var(--ink); padding: .3rem .6rem; white-space: nowrap; }
.pill--live { background: var(--ink); color: var(--paper); }

/* Notify */
.notify__inner { display: grid; gap: 1.25rem; justify-items: start; }
.notify h2 { font-size: clamp(2.25rem, 1.2rem + 4vw, 5rem); letter-spacing: -0.03em; }
.notify p { color: var(--on-ink-muted); }

.footer { background: var(--ink); color: var(--on-ink-muted); border-top: 1px solid #3a352f; padding-block: 1.75rem; font-size: var(--text-sm); }
.footer__row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer strong { color: var(--on-ink); }
.footer .label { color: var(--on-ink-muted); }

/* Responsive */
@media (max-width: 960px) {
  .cover__grid { grid-template-columns: 1fr 1fr; grid-template-areas: "lead lead" "status quote" "index index"; }
  .spread, .algo { grid-template-columns: 1fr; }
  .spread__body { columns: 1; }
  .boxgrid { grid-template-columns: repeat(2, 1fr); }
  .turns { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .cover__art { min-height: 6rem; }
  .masthead nav a:not(.nav-cta) { display: none; }
  .cover__grid { grid-template-columns: 1fr; grid-template-areas: "lead" "status" "quote" "index"; }
  .boxgrid { grid-template-columns: 1fr; }
  .tile--feature, .tile--dossier, .tile--wide { grid-column: auto; grid-row: auto; }
  .signals { grid-template-columns: 1fr; }
  .road__item { grid-template-columns: 2.5rem 1fr; }
  .road__item .pill { grid-column: 2; justify-self: start; }
  .mode { flex: 1 1 50%; border-bottom: 1.5px solid var(--ink); }
  .demo__grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 4.75rem; }
  .dbox b { font-size: .85rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }