/* eigenhand.dev — design tokens from the eigenhand brand (BRAND.md) and the v2 draft */
@font-face {
  font-family: "Space Grotesk";
  src: url("/fonts/space-grotesk-var.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}
@font-face {
  font-family: "Space Mono";
  src: url("/fonts/space-mono.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

:root {
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "Space Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
  --navy: #374559;
  --slate: #525F73;
  --bg: #fafbfc;
  --panel: #ffffff;
  --panel-2: #f4f6f9;
  --fg: #374559;
  --muted: #6d7889;
  --hair: #dfe4ea;
  --accent: #a5673f;
  --accent-soft: #a5673f1a;
  --btn-bg: #374559;
  --btn-fg: #fafbfc;
  --code-bg: #37455910;
  --shadow: 0 1px 2px #37455912, 0 12px 32px -12px #37455926;
  --scene: radial-gradient(120vmin 90vmin at 70% -10%, #ffffff 0%, #fafbfc 52%, #f0f3f7 100%);
  --wm: url("/brand/eigenhand-mark-mono.svg");
  --wm-opacity: .025;
  --nav-bg: #fafbfccc;
  --ok: #3f7a5a;
  --radius: 18px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161d29;
    --panel: #1d2635;
    --panel-2: #192130;
    --fg: #e8ecf2;
    --muted: #8894a8;
    --hair: #2c3850;
    --accent: #cf9268;
    --accent-soft: #cf926821;
    --btn-bg: #edeff3;
    --btn-fg: #1a2230;
    --code-bg: #edeff314;
    --shadow: 0 1px 2px #0006, 0 18px 40px -18px #000a;
    --scene: radial-gradient(120vmin 90vmin at 70% -10%, #202b3d 0%, #161d29 55%, #121824 100%);
    --wm: url("/brand/eigenhand-mark-mono-light.svg");
    --wm-opacity: .035;
    --nav-bg: #161d29cc;
    --ok: #7fbf98;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  background: var(--scene) var(--bg);
  background-attachment: fixed;
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
a { color: inherit; }
.mono { font-family: var(--font-mono); }
code {
  font-family: var(--font-mono);
  font-size: .9em;
  background: var(--code-bg);
  padding: .1em .38em;
  border-radius: 5px;
}
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 max(5vw, 1.4rem); }

/* watermark and pointer glow */
.wm {
  position: fixed; right: -10vmin; bottom: -12vmin; width: 62vmin; height: 62vmin;
  background: var(--wm) no-repeat center / contain; opacity: var(--wm-opacity);
  transform: rotate(-8deg); pointer-events: none; z-index: -1;
}
.glow {
  position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background: radial-gradient(420px circle at var(--mx, 70%) var(--my, 20%), var(--accent-soft), transparent 70%);
  transition: opacity .4s;
}

/* ---------- nav ---------- */
nav {
  position: sticky; top: 0; z-index: 20;
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hair);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.nav-brand {
  display: flex; align-items: center; gap: .65rem; text-decoration: none;
  font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; letter-spacing: -.01em;
}
.nav-brand img { width: 30px; height: 30px; display: block; }
.nav-links { display: flex; align-items: center; gap: clamp(.9rem, 2.6vw, 2rem); }
.nav-links a { text-decoration: none; font-size: .86rem; font-weight: 500; color: var(--muted); transition: color .15s; }
.nav-links a:hover { color: var(--fg); }
.nav-links a.cta { color: var(--accent); }
.nav-links a.lang {
  font-size: .72rem; letter-spacing: .08em; border: 1px solid var(--hair);
  padding: .15rem .5rem; border-radius: 999px;
}
.nav-links a.lang:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 640px) { .nav-links a:not(.lang):not(.cta) { display: none; } }

/* ---------- hero ---------- */
header { position: relative; overflow: hidden; border-bottom: 1px solid var(--hair); }
.grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    repeating-linear-gradient(to right, var(--fg) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(to bottom, var(--fg) 0 1px, transparent 1px 56px);
  opacity: .035;
  -webkit-mask-image: radial-gradient(90vmin 70vmin at 68% 40%, #000 0%, transparent 75%);
  mask-image: radial-gradient(90vmin 70vmin at 68% 40%, #000 0%, transparent 75%);
}
.hero {
  position: relative; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
  align-items: center; gap: 3rem; padding-block: clamp(4.5rem, 11vh, 8rem);
}
.kicker { font-size: .78rem; letter-spacing: .04em; color: var(--accent); }
.kicker .thin { color: var(--muted); }
.hero .kicker { display: block; margin-bottom: 1.3rem; }
h1 {
  font-family: var(--font-display); font-size: clamp(2.5rem, 6.4vw, 4.3rem);
  line-height: 1.03; letter-spacing: -.03em; font-weight: 700; margin-bottom: 1.5rem;
}
h1 em { font-style: normal; color: var(--slate); }
@media (prefers-color-scheme: dark) { h1 em { color: #aab6c9; } }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 35rem; margin-bottom: 2.2rem; }
.lead strong { color: var(--fg); font-weight: 600; }
.btn-row { display: flex; gap: .75rem; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: .45rem; text-decoration: none;
  font-size: .9rem; font-weight: 600; padding: .72rem 1.25rem; border-radius: 999px;
  border: 1px solid transparent; transition: transform .15s, background .15s, border-color .15s, color .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn-ghost { border-color: var(--hair); color: var(--fg); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.stats { display: flex; gap: clamp(1.2rem, 4vw, 2.6rem); margin-top: 2.6rem; flex-wrap: wrap; }
.stat { display: grid; gap: .1rem; }
.stat-v { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; letter-spacing: -.02em; color: var(--fg); }
.stat-l { font-size: .7rem; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; }

.hero-stage { position: relative; aspect-ratio: 1; display: grid; place-items: center; }
.hero-stage picture { position: relative; z-index: 2; width: 58%; display: grid; place-items: center; }
.hero-mark { display: block; width: 100%; height: auto; transition: transform .3s ease-out; }
.ring {
  position: absolute; border: 1px solid var(--hair); border-radius: 50%;
  animation: breathe 7s ease-in-out infinite;
}
.ring:nth-child(1) { inset: 16%; }
.ring:nth-child(2) { inset: 4%; animation-delay: -2.3s; }
.ring:nth-child(3) { inset: -8%; animation-delay: -4.6s; opacity: .6; }
@keyframes breathe { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.035); } }
.orbit { position: absolute; inset: -2%; animation: spin 48s linear infinite; }
.orbit i {
  position: absolute; font-style: normal; font-family: var(--font-mono); font-size: .66rem;
  letter-spacing: .06em; color: var(--muted); background: var(--panel); border: 1px solid var(--hair);
  padding: .12rem .5rem; border-radius: 999px; box-shadow: var(--shadow);
}
.orbit i:nth-child(1) { top: 2%; left: 50%; transform: translateX(-50%); }
.orbit i:nth-child(2) { top: 50%; right: -2%; transform: translateY(-50%); }
.orbit i:nth-child(3) { bottom: 2%; left: 50%; transform: translateX(-50%); }
.orbit i:nth-child(4) { top: 50%; left: -2%; transform: translateY(-50%); }
@keyframes spin { to { transform: rotate(360deg); } }
.orbit i { animation: counter 48s linear infinite; }
.orbit i:nth-child(1), .orbit i:nth-child(3) { animation-name: counter-x; }
.orbit i:nth-child(2), .orbit i:nth-child(4) { animation-name: counter-y; }
@keyframes counter-x { from { transform: translateX(-50%) rotate(0); } to { transform: translateX(-50%) rotate(-360deg); } }
@keyframes counter-y { from { transform: translateY(-50%) rotate(0); } to { transform: translateY(-50%) rotate(-360deg); } }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero-stage { width: min(62vw, 230px); justify-self: center; order: -1; margin: -1.5rem 0 -1rem; }
}

/* ---------- sections ---------- */
section { padding-block: clamp(4rem, 10vh, 6.5rem); }
section + section { border-top: 1px solid var(--hair); }
.section-head { max-width: 40rem; margin-bottom: 2.6rem; }
.section-head .kicker { display: block; margin-bottom: .8rem; }
h2 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.1; letter-spacing: -.022em; margin-bottom: .9rem; }
.section-head p { color: var(--muted); font-size: 1.04rem; }

/* ---------- filters ---------- */
.filters { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.8rem; }
.filter {
  font: 500 .82rem/1 var(--font-mono); letter-spacing: .02em; color: var(--muted);
  background: transparent; border: 1px solid var(--hair); border-radius: 999px;
  padding: .55rem .95rem; cursor: pointer; transition: all .15s;
}
.filter:hover { color: var(--fg); border-color: var(--muted); }
.filter.on { background: var(--btn-bg); color: var(--btn-fg); border-color: var(--btn-bg); }

/* ---------- project cards ---------- */
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem; }
@media (min-width: 1000px) { .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.card {
  position: relative; display: flex; flex-direction: column; gap: 1rem; min-width: 0;
  background: var(--panel); border: 1px solid var(--hair); border-radius: var(--radius);
  padding: clamp(1.4rem, 3vw, 2rem); box-shadow: var(--shadow);
  transition: transform .25s, border-color .25s, opacity .3s;
}
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 45%, var(--hair)); }
.card.featured { grid-column: 1 / -1; }
.card.is-hidden { display: none; }
.card-head { display: flex; align-items: center; gap: 1rem; }
.glyph-tile {
  flex: none; display: grid; place-items: center; width: 56px; height: 56px;
  border-radius: 15px; background: var(--panel-2); border: 1px solid var(--hair); color: var(--fg);
}
.glyph { width: 34px; height: 34px; }
.card h3 { font-family: var(--font-display); font-size: 1.45rem; letter-spacing: -.02em; line-height: 1.15; }
.featured h3 { font-size: 1.9rem; }
.tagline { color: var(--muted); font-size: .95rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip { font-size: .7rem; letter-spacing: .02em; padding: .18rem .6rem; border-radius: 999px; border: 1px solid var(--hair); color: var(--muted); }
.status { border-color: transparent; background: var(--accent-soft); color: var(--accent); }
.status-released { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.status-released::before { content: "● "; font-size: .7em; }
.desc { font-size: .98rem; }
.usp {
  font-family: var(--font-display); font-weight: 700; letter-spacing: -.025em; line-height: 1.08;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem); margin: .2rem 0 .1rem;
}
.usp em { font-style: normal; color: var(--accent); }
.live { border-color: transparent; background: var(--accent-soft); color: var(--accent); position: relative; padding-left: 1.3rem; }
.live::before {
  content: ""; position: absolute; left: .55rem; top: 50%; width: .42rem; height: .42rem; margin-top: -.21rem;
  border-radius: 50%; background: var(--accent); animation: pulse 1.6s ease-out infinite;
}
@keyframes pulse { 0% { box-shadow: 0 0 0 0 var(--accent); } 100% { box-shadow: 0 0 0 .5rem transparent; } }
.features { list-style: none; display: grid; gap: .35rem; font-size: .9rem; color: var(--muted); }
.features li { padding-left: 1.2rem; position: relative; }
.features li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--font-mono); font-size: .85em; }
.snippet {
  font-size: .76rem; line-height: 1.65; background: var(--code-bg); border: 1px solid var(--hair);
  border-radius: 12px; padding: .85rem 1rem; overflow-x: auto; white-space: pre;
}
.snippet code { background: none; padding: 0; font-size: inherit; }
.snippet .p { color: var(--accent); }
.snippet .s { color: var(--ok); }
.snippet .k { color: var(--slate); }
@media (prefers-color-scheme: dark) { .snippet .k { color: #aab6c9; } }
.snippet .c { color: var(--muted); }
.card-foot { margin-top: auto; display: flex; gap: .6rem; flex-wrap: wrap; padding-top: .3rem; }
.card-foot .btn { font-size: .82rem; padding: .55rem 1rem; }

/* featured layout: two columns on wide screens */
@media (min-width: 900px) {
  .card.featured {
    display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    grid-template-areas: "head player" "usp player" "chips player" "desc metrics" "features snippet" "foot foot";
    column-gap: 2.4rem; align-items: start;
  }
  .featured .card-head { grid-area: head; }
  .featured .chips { grid-area: chips; }
  .featured .usp { grid-area: usp; }
  .featured .desc { grid-area: desc; }
  .featured .metrics { grid-area: metrics; }
  .featured .player { grid-area: player; align-self: stretch; }
  .featured .features { grid-area: features; }
  .featured .snippet { grid-area: snippet; }
  .featured .card-foot { grid-area: foot; }
}
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: .6rem; }
.metric { border: 1px solid var(--hair); border-radius: 12px; padding: .75rem .8rem; background: var(--panel-2); display: grid; gap: .2rem; }
.metric-v { font-family: var(--font-display); font-weight: 700; font-size: 1.45rem; letter-spacing: -.02em; }
.metric-l { font-size: .72rem; color: var(--muted); line-height: 1.35; }
@media (max-width: 520px) {
  .metrics { grid-template-columns: 1fr; gap: .45rem; }
  .metric { grid-template-columns: 4.6rem 1fr; align-items: center; gap: .8rem; padding: .6rem .8rem; }
  .metric-v { font-size: 1.25rem; }
}

/* audio player */
.player {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; grid-template-rows: auto auto; align-items: center;
  gap: .9rem 1rem; padding: 1.1rem 1.2rem; border-radius: 16px;
  background: linear-gradient(135deg, var(--panel-2), var(--panel)); border: 1px solid var(--hair);
}
.player figcaption { grid-column: 1 / -1; font-size: .84rem; color: var(--muted); }
.player .fine { display: block; font-size: .72rem; margin-top: .25rem; opacity: .85; }
.play {
  width: 52px; height: 52px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--btn-bg); color: var(--btn-fg); display: grid; place-items: center;
  box-shadow: 0 0 0 0 var(--accent-soft); transition: box-shadow .3s, transform .15s;
}
.play:hover { transform: scale(1.05); }
.player.playing .play { box-shadow: 0 0 0 10px var(--accent-soft); }
.play .ico { width: 0; height: 0; border-left: 14px solid currentColor; border-top: 9px solid transparent; border-bottom: 9px solid transparent; margin-left: 4px; }
.player.playing .play .ico { width: 14px; height: 16px; border: 0; margin: 0; border-left: 4px solid currentColor; border-right: 4px solid currentColor; }
.wave { height: 54px; display: flex; align-items: center; gap: 2px; cursor: pointer; min-width: 0; }
@media (max-width: 480px) { .wave { gap: 1px; } }
.wave i {
  flex: 1; min-width: 1px; height: calc(var(--h) * 100%); border-radius: 2px;
  background: var(--hair); transition: background .2s;
}
.wave i.done { background: var(--accent); }
.time { font-size: .75rem; color: var(--muted); min-width: 2.6rem; text-align: right; }

/* ---------- principles ---------- */
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.2rem; }
@media (min-width: 960px) { .principles { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.8rem; } }
.principle { border-top: 2px solid var(--fg); padding-top: 1.1rem; }
.principle .num { font-size: .75rem; color: var(--accent); }
.principle h3 { font-family: var(--font-display); font-size: 1.12rem; letter-spacing: -.01em; margin: .4rem 0 .5rem; }
.principle p { font-size: .92rem; color: var(--muted); }

/* ---------- toolbox marquee ---------- */
.stack-band { padding-block: 2.6rem; overflow: hidden; }
.stack-band .kicker { display: block; margin-bottom: 1.1rem; }
.marquee { -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.track { display: flex; gap: .7rem; width: max-content; animation: slide 46s linear infinite; }
.marquee:hover .track { animation-play-state: paused; }
.track span { font-size: .8rem; color: var(--muted); border: 1px solid var(--hair); border-radius: 999px; padding: .4rem .9rem; white-space: nowrap; background: var(--panel); }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------- contact & footer ---------- */
.contact {
  display: grid; grid-template-columns: minmax(0, 1.2fr) auto; gap: 2rem; align-items: end;
  background: var(--panel); border: 1px solid var(--hair); border-radius: 24px;
  padding: clamp(1.8rem, 5vw, 3rem); box-shadow: var(--shadow);
}
.contact .kicker { display: block; margin-bottom: .8rem; }
.contact p { color: var(--muted); }
@media (max-width: 760px) { .contact { grid-template-columns: 1fr; } .cards { grid-template-columns: minmax(0, 1fr); } }
footer { border-top: 1px solid var(--hair); padding-block: 1.8rem 2.4rem; font-size: .8rem; color: var(--muted); }
.foot-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; }
.foot-brand { display: flex; align-items: center; gap: .55rem; }
footer a { text-decoration-color: var(--accent); text-underline-offset: 3px; }

/* ---------- reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- legal pages ---------- */
.legal { max-width: 760px; padding-block: 3rem 5rem; }
.legal .back { display: inline-block; font-size: .8rem; color: var(--muted); text-decoration: none; margin-bottom: 2.2rem; }
.legal .back:hover { color: var(--accent); }
.legal h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin-bottom: 1.4rem; }
.legal h2 { font-family: var(--font-display); font-size: 1.12rem; letter-spacing: -.01em; margin: 2.2rem 0 .6rem; }
.legal p { margin-bottom: .8rem; }
.legal p.lead { font-size: 1.05rem; color: var(--fg); margin-bottom: 1.6rem; }
.legal a { text-decoration-color: var(--accent); text-underline-offset: 3px; }
.legal .note { font-size: .82rem; color: var(--muted); border-left: 2px solid var(--accent); padding-left: .8rem; margin-bottom: 2rem; }
.legal .muted { color: var(--muted); font-size: .85rem; margin-top: 2.6rem; padding-top: 1.2rem; border-top: 1px solid var(--hair); }
.todo { display: inline-block; border: 2px dashed var(--accent); border-radius: 8px; padding: .2rem .6rem; color: var(--accent); font-weight: 600; }