/* TALLOW DARK — see DESIGN.md.
   One idea: the raw material and the refined result are the same substance,
   told twice. --render is the single scalar that carries that turn through
   the whole document. */

/* --------------------------------------------------------------------- *
   0 — the one variable
 * --------------------------------------------------------------------- */

@property --render {
  syntax: '<number>';
  inherits: true;
  initial-value: 0;
}

:root {
  --render: 0;

  --pitch: #0a0a0c;
  --pitch-warm: #14100a;
  --raise: #141417;
  --raise-warm: #1b1710;

  --chalk: #e6e4de;
  --grease: #9b978d;
  --dim: #6e6b64;

  --steel: #a8afb3;
  --tallow: #d9b26a;
  --ember: #8a5a22;

  /* live ground and live accent — both move with --render */
  --ground: color-mix(in oklab, var(--pitch), var(--pitch-warm) calc(var(--render) * 100%));
  --ground-raise: color-mix(in oklab, var(--raise), var(--raise-warm) calc(var(--render) * 100%));
  --accent: color-mix(in oklab, var(--steel), var(--tallow) calc(var(--render) * 100%));
  --rule: color-mix(in oklab, var(--dim), var(--ember) calc(var(--render) * 62%));

  --mono: 'Martian Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --serif: 'Newsreader', Georgia, 'Times New Roman', serif;

  --gutter: clamp(20px, 4.4vw, 76px);
  --band: clamp(72px, 11vh, 140px);
  --maxw: 1560px;

  --step--1: clamp(0.70rem, 0.67rem + 0.13vw, 0.78rem);
  --step-0:  clamp(0.94rem, 0.90rem + 0.18vw, 1.06rem);
  --step-1:  clamp(1.13rem, 1.05rem + 0.36vw, 1.38rem);
  --step-2:  clamp(1.38rem, 1.22rem + 0.72vw, 1.88rem);
  --step-3:  clamp(1.75rem, 1.42rem + 1.48vw, 2.75rem);
  --step-4:  clamp(2.25rem, 1.61rem + 2.86vw, 4.20rem);
  --step-5:  clamp(2.85rem, 1.72rem + 5.05vw, 6.30rem);
  --step-6:  clamp(3.40rem, 1.52rem + 8.40vw, 9.00rem);
}

/* --------------------------------------------------------------------- *
   1 — reset and ground
 * --------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--pitch);
  background: var(--ground);
  color: var(--chalk);
  font-family: var(--serif);
  font-size: var(--step-0);
  font-optical-sizing: auto;
  line-height: 1.62;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color .4s linear;
}

img { display: block; max-width: 100%; height: auto; }

a { color: inherit; }

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--tallow);
  outline-offset: 3px;
  border-radius: 1px;
}

::selection { background: var(--tallow); color: #0a0a0c; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--chalk);
  color: #0a0a0c;
  padding: .7rem 1.1rem;
  font: 600 var(--step--1)/1 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.skip:focus { left: 0; }

.u-vh {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* --------------------------------------------------------------------- *
   2 — the two voices
 * --------------------------------------------------------------------- */

.raw,
.label,
.meta,
nav,
.wordmark {
  font-family: var(--mono);
  font-variation-settings: 'wdth' 87.5;
  font-feature-settings: 'tnum' 1;
}

.label {
  display: block;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.5rem;
}
.label .n { color: var(--dim); }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 350;
  line-height: 1.02;
  letter-spacing: -0.016em;
  margin: 0;
  text-wrap: balance;
}

h1 { font-size: var(--step-6); }
h2 { font-size: var(--step-5); }
h3 { font-size: var(--step-2); line-height: 1.16; letter-spacing: -0.008em; }

/* the raw register: the same heading levels, set as a factory notice */
h1.raw, h2.raw, h3.raw {
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.06;
  text-transform: uppercase;
}
h1.raw { font-size: var(--step-4); }
h2.raw { font-size: var(--step-3); }
h3.raw { font-size: var(--step-1); letter-spacing: .02em; }

p { margin: 0 0 1.1em; max-width: 62ch; }
p.raw { font-size: var(--step--1); line-height: 1.85; letter-spacing: .015em; max-width: 46ch; color: var(--grease); }

.lede { font-size: var(--step-1); line-height: 1.5; color: var(--chalk); }

.dropline {
  font-size: var(--step-2);
  line-height: 1.34;
  max-width: 24ch;
  font-style: italic;
  color: var(--chalk);
}

/* --------------------------------------------------------------------- *
   3 — shell
 * --------------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

section { position: relative; }

.band { padding-block: var(--band); }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--rule);
  opacity: .8;
}

/* --------------------------------------------------------------------- *
   4 — navigation
 * --------------------------------------------------------------------- */

.top {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  display: flex;
  align-items: baseline;
  gap: clamp(1rem, 4vw, 3.5rem);
  padding: 1.15rem var(--gutter);
  background: var(--pitch);
  background: var(--ground);
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: .34em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--chalk);
  white-space: nowrap;
}
.wordmark .b { color: var(--accent); }

.top nav {
  margin-left: auto;
  display: flex;
  gap: clamp(.9rem, 2.4vw, 2.2rem);
  flex-wrap: wrap;
}

.top nav a {
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--grease);
  white-space: nowrap;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.top nav a:hover,
.top nav a:focus-visible { color: var(--chalk); border-bottom-color: var(--accent); }
.top nav a[aria-current='page'] { color: var(--chalk); border-bottom-color: var(--accent); }

/* on a phone the wordmark already goes home — keep the nav to one line */
@media (max-width: 560px) {
  .top { gap: .8rem; }
  .top nav { gap: .9rem; flex-wrap: nowrap; }
  .top nav a { letter-spacing: .1em; }
  .top nav a[href='index.html'] { display: none; }
  .wordmark { letter-spacing: .22em; }
}

/* --------------------------------------------------------------------- *
   5 — hero
 * --------------------------------------------------------------------- */

.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr auto;
  align-content: end;
  padding-block: calc(var(--band) * 1.3) clamp(2rem, 6vh, 4rem);
  isolation: isolate;
}

.hero-frame {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}
.hero-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  opacity: .78;
}
@media (min-width: 900px) {
  .hero-frame img { width: 68%; margin-left: auto; object-position: 60% 45%; }
}
.hero-frame::after {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(to top, var(--ground) 4%, color-mix(in oklab, var(--ground), transparent 40%) 34%, transparent 70%),
    linear-gradient(to right, var(--ground) 30%, color-mix(in oklab, var(--ground), transparent 55%) 52%, transparent 78%);
}
@media (max-width: 899px) {
  .hero-frame::after {
    background: linear-gradient(to top, var(--ground) 22%, color-mix(in oklab, var(--ground), transparent 30%) 55%, color-mix(in oklab, var(--ground), transparent 70%) 100%);
  }
}

.hero-body { grid-row: 2; grid-column: 1; }

.hero h1 {
  max-width: 17ch;
  margin-bottom: clamp(1.4rem, 3.4vh, 2.6rem);
}
.hero h1 .thin { color: var(--grease); }

.hero-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.2rem, 3vw, 3rem);
  align-items: end;
  border-top: 1px solid var(--rule);
  padding-top: 1.4rem;
}

@media (min-width: 900px) {
  .hero-foot { grid-template-columns: minmax(0, 30ch) minmax(0, 1fr) auto; }
}

.hero-foot .cta { justify-self: start; }

@media (min-width: 900px) {
  .hero-foot .cta { justify-self: end; }
}

.scroll-cue {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dim);
  display: flex;
  align-items: center;
  gap: .6rem;
}
.scroll-cue::after {
  content: '';
  width: 42px; height: 1px;
  background: var(--rule);
  transform-origin: left;
  animation: cue 2.6s ease-in-out infinite;
}
@keyframes cue { 0%,100% { transform: scaleX(.3); } 50% { transform: scaleX(1); } }

/* --------------------------------------------------------------------- *
   6 — the render pass (the one authored moment)
 * --------------------------------------------------------------------- */

.render {
  position: relative;
  height: 320svh;
}

.render-stage {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  background: #060607;
}

.render-stage canvas,
.render-stage .fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.render-stage canvas { z-index: 1; }
.render-stage .fallback { z-index: 0; filter: grayscale(1) contrast(1.15) brightness(.82); }
.render-stage.live .fallback { opacity: 0; }

.render-ui {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: calc(var(--band) * 1.05) var(--gutter) clamp(1.6rem, 5vh, 3rem);
  pointer-events: none;
}

.render-ui .state {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .16em;
  text-transform: uppercase;
  line-height: 2.1;
  margin: 0;
  list-style: none;
  padding: 0;
  max-width: 34ch;
  text-shadow: 0 1px 14px rgba(0,0,0,.85);
}
.render-ui .state li { display: flex; gap: 1ch; }
.render-ui .state dt, .render-ui .state .k {
  color: var(--dim);
  min-width: 11ch;
}

.state--raw, .state--done { transition: opacity .5s linear; }
.state--raw { grid-row: 1; color: var(--steel); }
.state--done {
  grid-row: 3;
  color: var(--tallow);
  justify-self: end;
  text-align: right;
}
.state--done li { justify-content: flex-end; }

.render-ui h2 {
  grid-row: 2;
  align-self: center;
  max-width: 15ch;
  text-shadow: 0 2px 30px rgba(0,0,0,.7);
}

.meniscus-chip {
  position: absolute;
  right: var(--gutter);
  top: 50%;
  z-index: 4;
  transform: translateY(-50%);
  transition: opacity .3s linear;
  font-family: var(--mono);
  font-size: var(--step--1);
  font-feature-settings: 'tnum' 1;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #0a0a0c;
  background: var(--accent);
  padding: .35rem .8rem;
  white-space: nowrap;
  pointer-events: none;
}

/* --------------------------------------------------------------------- *
   7 — the ledger: every fact printed twice
 * --------------------------------------------------------------------- */

.ledger-head {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1fr;
  margin-bottom: clamp(2.4rem, 6vh, 4.5rem);
}
@media (min-width: 960px) {
  .ledger-head { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: end; gap: clamp(2rem, 5vw, 6rem); }
}

.ledger {
  border-top: 1px solid var(--rule);
}

.ledger-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .35rem;
  padding: clamp(1.1rem, 2.6vh, 1.9rem) 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}

@media (min-width: 960px) {
  .ledger-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 6rem);
  }
}

.ledger-row .cell-raw {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--mono);
  font-variation-settings: 'wdth' 87.5;
  font-size: var(--step--1);
  line-height: 1.75;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--grease);
}

.ledger-row .cell-done {
  grid-column: 1;
  grid-row: 2;
  font-size: var(--step-1);
  line-height: 1.34;
  color: var(--chalk);
}

@media (min-width: 960px) {
  .ledger-row .cell-done { grid-column: 2; grid-row: 1; }
}

.ledger-row:last-child { border-bottom: 0; }

.ledger-row--turn { background: var(--ground-raise); }
.ledger-row--turn .cell-raw { padding-left: clamp(0px, 1.4vw, 1.4rem); }
.ledger-row--turn .cell-done { color: var(--tallow); font-style: italic; }
@media (min-width: 960px) {
  .ledger-row--turn .cell-raw,
  .ledger-row--turn .cell-done { padding-block: .9rem; }
  .ledger-row--turn .cell-done { padding-right: clamp(0px, 1.4vw, 1.4rem); }
}

.col-head {
  display: none;
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--dim);
  padding-bottom: .9rem;
}
@media (min-width: 960px) {
  .col-heads {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 6rem);
    border-bottom: 1px solid var(--rule);
  }
  .col-head { display: block; }
  .col-head:nth-child(1) { grid-column: 1; grid-row: 1; color: var(--steel); }
  .col-head:nth-child(2) { grid-column: 2; grid-row: 1; color: var(--tallow); }
}

/* --------------------------------------------------------------------- *
   8 — frames and editorial blocks
 * --------------------------------------------------------------------- */

.frame {
  position: relative;
  width: 100vw;
  margin-left: 50%;
  transform: translateX(-50%);
  overflow: hidden;
}
.frame img {
  width: 100%;
  height: clamp(340px, 74svh, 820px);
  object-fit: cover;
}
.frame figcaption {
  position: absolute;
  left: var(--gutter);
  bottom: clamp(1rem, 3vh, 2rem);
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--chalk);
  text-shadow: 0 1px 16px rgba(0,0,0,.9);
  max-width: 40ch;
}
.frame figcaption b { color: var(--accent); font-weight: 600; }

/* staggered editorial pair — deliberately not a card grid */
.stagger {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.4rem, 7vh, 6rem) clamp(2rem, 5vw, 6rem);
  align-items: start;
}
@media (min-width: 900px) {
  .stagger { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .stagger > .s-a  { grid-column: 1 / span 5;  grid-row: 1; }
  .stagger > .s-b  { grid-column: 7 / span 5;  grid-row: 1; margin-top: clamp(3rem, 12vh, 9rem); }
  .stagger > .s-c  { grid-column: 2 / span 5;  grid-row: 2; margin-top: clamp(1rem, 6vh, 4rem); }
  .stagger > .s-d  { grid-column: 8 / span 4;  grid-row: 2; }
}

.piece img { width: 100%; }
.piece .cap {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: .9rem;
  display: block;
}
.piece h3 { margin: .3rem 0 .6rem; }

/* a whole page that lives after the turn (note.html) */
body.is-rendered { --render: 1; }

/* the rendered side: warm ground, serif prose */
.rendered {
  --render: 1;
  background: var(--ground);
  color: var(--chalk);
}
.rendered .label { color: var(--tallow); }

.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 5rem);
}
@media (min-width: 900px) {
  .two-col { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .two-col > * { grid-row: 1; }
  .two-col > :nth-child(1) { grid-column: 1; }
  .two-col > :nth-child(2) { grid-column: 2; }
}

/* note list — a vertical ledger, not a pyramid diagram */
.notes { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.notes li {
  display: grid;
  grid-template-columns: minmax(8ch, 12ch) minmax(0, 1fr);
  gap: 1.4rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.notes li > .k {
  grid-column: 1; grid-row: 1;
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dim);
}
.notes li > .v { grid-column: 2; grid-row: 1; font-size: var(--step-1); line-height: 1.4; }

/* --------------------------------------------------------------------- *
   9 — actions
 * --------------------------------------------------------------------- */

.cta {
  display: inline-flex;
  align-items: center;
  gap: .9rem;
  font-family: var(--mono);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  text-decoration: none;
  color: #0a0a0c;
  background: var(--accent);
  padding: .95rem 1.5rem;
  transition: background-color .25s, transform .25s;
}
.cta:hover, .cta:focus-visible { background: var(--chalk); transform: translateY(-1px); }
.cta svg { width: 1em; height: 1em; }

.cta--ghost {
  color: var(--chalk);
  background: transparent;
  border: 1px solid var(--rule);
}
.cta--ghost:hover, .cta--ghost:focus-visible { background: transparent; border-color: var(--accent); color: var(--accent); }

.acquire {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 4rem);
  align-items: end;
  border-top: 1px solid var(--rule);
  padding-top: clamp(2rem, 5vh, 3.4rem);
}
@media (min-width: 900px) {
  .acquire { grid-template-columns: minmax(0, 1fr) auto; }
  .acquire > :nth-child(1) { grid-column: 1; grid-row: 1; }
  .acquire > :nth-child(2) { grid-column: 2; grid-row: 1; }
}

.price {
  font-family: var(--mono);
  font-variation-settings: 'wdth' 87.5;
  font-size: var(--step-3);
  letter-spacing: -.01em;
  color: var(--chalk);
  display: block;
}
.price small { font-size: var(--step--1); letter-spacing: .18em; color: var(--dim); display: block; margin-top: .5rem; }

/* --------------------------------------------------------------------- *
   10 — footer
 * --------------------------------------------------------------------- */

.foot {
  border-top: 1px solid var(--rule);
  padding-block: clamp(2.4rem, 6vh, 4rem) clamp(1.6rem, 4vh, 2.6rem);
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .12em;
  color: var(--grease);
}
.foot a { text-decoration: none; border-bottom: 1px solid transparent; }
.foot a:hover, .foot a:focus-visible { border-bottom-color: var(--accent); color: var(--chalk); }
.foot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 3vw, 3rem);
}
@media (min-width: 760px) { .foot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.foot .foot-h {
  margin: 0 0 .9rem;
  font: 600 var(--step--1)/1 var(--mono);
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--dim);
}
.foot ul { list-style: none; margin: 0; padding: 0; line-height: 2.1; }
.foot .colophon {
  margin-top: clamp(2rem, 5vh, 3.4rem);
  padding-top: 1.3rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: .16em;
}

/* --------------------------------------------------------------------- *
   11 — reveals
 * --------------------------------------------------------------------- */

.line-mask { display: block; overflow: hidden; }

[data-reveal] { will-change: transform, opacity; }

/* --------------------------------------------------------------------- *
   12 — motion floor
 * --------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .scroll-cue::after { animation: none; transform: scaleX(1); }

  /* the render pass stops being a scrub and becomes a printed comparison:
     both states stay on screen, the mechanic still reads, nothing moves */
  .render { height: auto; }
  .render-stage { position: static; height: clamp(520px, 92svh, 900px); }
  .meniscus-chip { top: 50%; }
}