/* AcademIA — PLATE / PROTOCOL. Content-first, no images. OKLCH, no deps. */
:root {
  --bg: oklch(0.99 0.004 255);
  --surface: oklch(0.975 0.006 255);
  --surface-blue: oklch(0.48 0.27 264);
  --surface-ink: oklch(0.24 0.08 264);
  --ink: oklch(0.20 0.03 264);
  --ink-blue: oklch(0.32 0.17 264);
  --muted: oklch(0.45 0.03 264);
  --primary: oklch(0.48 0.27 264);
  --primary-press: oklch(0.40 0.22 264);
  --accent: oklch(0.93 0.21 112);
  --line: oklch(0.90 0.012 264);
  --on-blue: oklch(0.99 0.004 255);

  --font-display: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-wordmark: "Bodoni Moda", "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Courier New", monospace;

  --fw: clamp(6px, 0.9vw, 13px);            /* matte frame width */
  --gutter: clamp(1.15rem, 6vw, 7rem);
  --maxw: 1440px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --fs-wordmark: clamp(2.6rem, 10vw, 8.5rem);
  --fs-h1: clamp(2.3rem, 7.5vw, 6.5rem);
  --fs-h2: clamp(1.9rem, 5vw, 4.2rem);
  --fs-h3: clamp(1.15rem, 2.4vw, 1.9rem);
  --fs-marquee: clamp(1.4rem, 4vw, 3.2rem);
  --fs-body: clamp(1.02rem, 0.98rem + 0.25vw, 1.18rem);
  --fs-label: clamp(0.72rem, 0.7rem + 0.1vw, 0.82rem);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; padding: var(--fw);
  background: var(--bg); color: var(--ink);
  font-family: var(--font-mono); font-size: var(--fs-body); line-height: 1.55;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}

/* matte frame + paper grain + vignette (no images) */
.frame { position: fixed; inset: 0; border: var(--fw) solid var(--primary); z-index: 90; pointer-events: none; }
.grain { position: fixed; inset: 0; z-index: 88; pointer-events: none; opacity: 0.05; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.vignette { position: fixed; inset: 0; z-index: 87; pointer-events: none;
  background: radial-gradient(120% 120% at 50% 40%, transparent 60%, oklch(0.48 0.27 264 / 0.06)); }
@media (prefers-reduced-motion: reduce) { .grain { display: none; } }

/* type */
.display { font-family: var(--font-display); font-weight: 350; letter-spacing: 0.02em; line-height: 0.9; }
h1, h2 { font-family: var(--font-display); font-weight: 700; line-height: 0.98; letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-family: var(--font-mono); font-weight: 600; font-size: var(--fs-h3); margin: 0; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; max-width: 62ch; }
a { color: var(--primary); text-decoration: none; }
b, strong { font-weight: 600; }

/* mono utility voices */
.label { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.14em; font-size: var(--fs-label); color: var(--muted); }
.idx { font-family: var(--font-mono); display: inline-block; font-size: clamp(0.8rem, 0.9vw, 0.95rem); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--primary); border: 1.5px solid currentColor; border-radius: 2px; padding: 0.32rem 0.7rem; }
.tag { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.04em; color: var(--ink-blue); }
.tag::before { content: "#"; opacity: 0.55; }

/* layout */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(4.5rem, 11vh, 10rem); position: relative; }
.section--surface { background: var(--surface); }
.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }
.sec-head { display: block; margin-bottom: clamp(1.8rem, 4vw, 3.2rem); }
.sec-head .idx { margin-bottom: 1.1rem; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-weight: 600; font-size: 0.95rem;
  text-transform: uppercase; letter-spacing: 0.06em; padding: 0.85rem 1.3rem; border: 1.5px solid var(--primary); cursor: pointer;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), transform 0.25s var(--ease-out); }
.btn-primary { background: var(--primary); color: var(--on-blue); }
.btn-primary:hover { background: var(--primary-press); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--ink-blue); }
.btn-ghost:hover { background: var(--ink-blue); color: var(--on-blue); transform: translateY(-2px); }
.tlink { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.85rem; border-bottom: 1.5px solid var(--primary); padding-bottom: 2px; }
.tlink:hover { color: var(--ink-blue); border-color: var(--ink-blue); }

/* nav */
.nav { position: sticky; top: var(--fw); z-index: 60; background: oklch(0.99 0.004 255 / 0.86); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-in { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.7rem var(--gutter); }
.brand { font-family: var(--font-wordmark); font-weight: 500; font-size: 1.2rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink); }
.nav-menu { display: flex; gap: clamp(0.9rem, 2vw, 1.8rem); }
.nav-menu a { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.78rem; color: var(--ink); }
.nav-menu a:hover { color: var(--primary); }
.nav-right { display: flex; align-items: center; gap: 1rem; }
.lang { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; }
.lang a { color: var(--muted); }
.lang a[aria-current="true"] { color: var(--primary); font-weight: 600; }
@media (max-width: 800px) { .nav-menu { display: none; } }

/* hero */
.hero { position: relative; padding-block: clamp(2.5rem, 6vh, 5rem) clamp(3rem, 8vh, 6rem); }
.hero .eyebrow { margin-bottom: clamp(1.5rem, 5vh, 3.5rem); }
.wordmark { font-family: var(--font-wordmark); font-weight: 400; font-size: var(--fs-wordmark); line-height: 0.84; letter-spacing: 0.02em; text-transform: uppercase; color: var(--ink); margin: 0; }
.hero h1 { margin-top: clamp(1.2rem, 3vw, 2.2rem); max-width: 16ch; }
.hero h1 em { font-style: normal; color: var(--primary); }
.hero-sub { font-family: var(--font-mono); color: var(--muted); max-width: 56ch; margin-top: 1.4rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem 1.4rem; align-items: center; margin-top: 2rem; }

/* horizontal marquee band */
.band { background: var(--surface-blue); color: var(--on-blue); padding-block: clamp(1.1rem, 2.4vw, 1.7rem); border-block: 1.5px solid var(--ink-blue); display: grid; gap: 0.4rem; }
.band--ink { background: var(--surface-ink); }
.marquee { overflow: hidden; min-width: 0; max-width: 100%;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent); }
.marquee__track { display: inline-flex; flex-wrap: nowrap; white-space: nowrap; will-change: transform; animation: mq-x 34s linear infinite; }
.marquee__track > * { padding-inline: 1.1rem; }
.marquee--rev .marquee__track { animation-direction: reverse; }
.mq-item { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; font-size: var(--fs-marquee); font-weight: 500; }
.mq-sep { opacity: 0.5; }
@keyframes mq-x { to { transform: translateX(-50%); } }

/* concrete teacher example */
.case { display: grid; gap: clamp(1.6rem, 4vw, 3rem); }
@media (min-width: 880px) { .case { grid-template-columns: 1.5fr 1fr; gap: clamp(2rem, 5vw, 5rem); } }
.case-body p { font-size: clamp(1.15rem, 1rem + 0.8vw, 1.55rem); line-height: 1.5; max-width: 40ch; }
.case-turn { font-family: var(--font-display); font-weight: 350; font-size: var(--fs-h3); color: var(--ink-blue); margin-top: 1.4rem; }
.case-notes { font-family: var(--font-mono); font-size: 0.9rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 1rem; display: grid; gap: 0.8rem; }
.case-notes b { color: var(--ink); }

/* ROI ledger */
.roi { display: grid; gap: 0; border-top: 1px solid var(--line); }
@media (min-width: 820px) { .roi { grid-template-columns: 1fr 1fr; } .roi-col + .roi-col { border-left: 1px solid var(--line); } }
.roi-col { padding: clamp(1.6rem, 3vw, 2.6rem) 0; }
@media (min-width: 820px) { .roi-col { padding: clamp(1.6rem, 3vw, 2.6rem) clamp(1.6rem, 3vw, 2.6rem); } .roi-col:first-child { padding-left: 0; } .roi-col:last-child { padding-right: 0; } }
.roi-col h3 { margin-bottom: 1.2rem; }
.metric { display: block; padding: 0.95rem 0; border-top: 1px solid var(--line); }
.metric .n { display: block; margin-bottom: 0.3rem; font-family: var(--font-mono); font-weight: 600; color: var(--primary); font-size: 1.02rem; letter-spacing: 0.01em; }
.metric .d { color: var(--ink); font-size: 0.98rem; }
.roi-quote { font-family: var(--font-display); font-style: italic; color: var(--ink-blue); margin-top: 1.2rem; font-size: 1.1rem; }
.roi-tags { display: flex; gap: 0.8rem; margin-top: 0.6rem; }

/* services index */
.svc { border-top: 1px solid var(--line); }
.svc-row { display: grid; grid-template-columns: auto 1fr; gap: 0.4rem 1.4rem; align-items: baseline; padding: clamp(1.1rem, 2.5vw, 1.8rem) 0; border-bottom: 1px solid var(--line); transition: transform 0.3s var(--ease-out), background 0.3s var(--ease-out); }
.svc-row:hover { transform: translateX(0.6rem); background: var(--surface); }
.svc-no { font-family: var(--font-mono); font-weight: 600; color: var(--primary); font-size: clamp(1.1rem, 2vw, 1.6rem); }
.svc-row h3 { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.4rem, 3vw, 2.3rem); text-transform: none; }
.svc-row p { font-family: var(--font-mono); color: var(--muted); margin: 0.3rem 0 0; grid-column: 2; font-size: 0.95rem; }

/* manifesto + vertical marquee rail */
.manifesto { background: var(--surface-ink); color: var(--on-blue); position: relative; overflow: hidden; }
.manifesto .wrap { display: grid; gap: 2rem; }
@media (min-width: 880px) { .manifesto .wrap { grid-template-columns: 4rem 1fr; gap: clamp(2rem, 5vw, 5rem); } }
.vmarquee { display: block; overflow: hidden; min-width: 0; max-width: 100%; margin-bottom: 1.4rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent); }
.vmarquee__track { display: flex; flex-direction: row; width: max-content; white-space: nowrap; will-change: transform; animation: mq-x 26s linear infinite; }
.vmarquee__track > * { padding-inline: 0.9rem; }
.vmarquee .mq-item { color: oklch(0.99 0.004 255 / 0.72); font-size: 1.05rem; }
.vmarquee .mq-sep { color: var(--accent); opacity: 1; }
@media (min-width: 880px) {
  .vmarquee { height: clamp(20rem, 42vh, 34rem); align-self: start; position: sticky; top: 18vh; margin-bottom: 0;
    -webkit-mask-image: linear-gradient(180deg, transparent, #000 7%, #000 93%, transparent);
    mask-image: linear-gradient(180deg, transparent, #000 7%, #000 93%, transparent); }
  .vmarquee__track { flex-direction: column; width: auto; height: max-content; writing-mode: vertical-rl; animation: mq-y 24s linear infinite; }
  .vmarquee__track > * { padding-block: 1.1rem; padding-inline: 0; }
  .vmarquee .mq-item { font-size: 1.15rem; }
}
@keyframes mq-y { to { transform: translateY(-50%); } }
.manifesto h2 { color: var(--on-blue); font-weight: 800; font-size: clamp(2.4rem, 7vw, 5.5rem); line-height: 0.95; }
.manifesto h2 em { font-style: normal; color: var(--accent); }
.manifesto p { color: oklch(0.99 0.004 255 / 0.82); font-family: var(--font-mono); max-width: 56ch; margin-top: 1.6rem; }

/* method timeline */
.method { border-top: 1px solid var(--line); }
.step-row { display: grid; grid-template-columns: auto 1fr auto; gap: 0.4rem 1.4rem; align-items: baseline; padding: clamp(1rem, 2.4vw, 1.6rem) 0; border-bottom: 1px solid var(--line); }
.step-row .k { font-family: var(--font-mono); color: var(--primary); font-weight: 600; letter-spacing: 0.06em; }
.step-row h3 { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.3rem, 2.6vw, 2rem); text-transform: none; }
.step-row .when { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.step-row p { grid-column: 2 / -1; font-family: var(--font-mono); color: var(--muted); font-size: 0.95rem; margin: 0.3rem 0 0; }

/* founders ledger */
.crew { border-top: 1px solid var(--line); }
.crew-row { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem 1.4rem; align-items: baseline; padding: clamp(1.1rem, 2.5vw, 1.7rem) 0; border-bottom: 1px solid var(--line); }
.crew-row .nm { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.4rem, 3vw, 2.2rem); }
.crew-row .ro { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.82rem; color: var(--primary); }
.crew-row .tags { display: flex; gap: 0.8rem; grid-column: 1 / -1; }
.crew-foot { font-family: var(--font-display); font-style: italic; color: var(--muted); margin-top: 1.4rem; }

/* CTA + selector */
.cta { background: var(--surface-blue); color: var(--on-blue); }
.cta h2 { color: var(--on-blue); }
.cta p { color: oklch(0.99 0.004 255 / 0.85); font-family: var(--font-mono); }
.selector { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.8rem 0; }
.selector label { display: inline-flex; align-items: center; gap: 0.5rem; border: 1.5px solid oklch(0.99 0.004 255 / 0.5); padding: 0.55rem 0.9rem; font-family: var(--font-mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; cursor: pointer; transition: background 0.2s var(--ease-out); }
.selector label:hover { background: oklch(0.99 0.004 255 / 0.12); }
.selector input { accent-color: var(--accent); width: 1rem; height: 1rem; }
.cta .btn-primary { background: var(--on-blue); color: var(--ink-blue); border-color: var(--on-blue); }
.cta .btn-primary:hover { background: var(--accent); color: var(--ink-blue); border-color: var(--accent); }

/* stamps + footer */
.stamps { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem 1.4rem; }
.stamp { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.footer { padding-block: 2.4rem; border-top: 1px solid var(--line); }

.hero-proof { font-family: var(--font-mono); font-size: 0.9rem; color: var(--ink-blue); letter-spacing: 0.02em; margin-top: 1.4rem; padding-top: 1rem; border-top: 1px solid var(--line); max-width: 54ch; }
.hero-proof b { color: var(--primary); }
.crew-row .desc { grid-column: 1 / -1; font-family: var(--font-mono); font-size: 0.9rem; color: var(--muted); margin: 0.3rem 0 0; }

::selection { background: var(--accent); color: var(--ink-blue); }
:focus-visible { outline: 2.5px solid var(--primary); outline-offset: 3px; }

/* reveal motion — opt-in via html.anim (visible without JS / in headless / for crawlers) */
[data-reveal] { transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out), clip-path 0.7s var(--ease-out); }
html.anim [data-reveal] { opacity: 0; transform: translateY(1.6rem); clip-path: inset(0 0 100% 0); }
html.anim [data-reveal].in { opacity: 1; transform: none; clip-path: inset(0 0 0 0); }
@media (prefers-reduced-motion: reduce) {
  .marquee__track, .vmarquee__track { animation: none; transform: none; }
  .marquee { overflow-x: auto; }
  .vmarquee { writing-mode: horizontal-tb; height: auto; position: static; }
  .vmarquee__track { writing-mode: horizontal-tb; flex-direction: row; flex-wrap: wrap; }
  html.anim [data-reveal] { opacity: 1; transform: none; clip-path: none; }
}