/* ─────────────────────────────────────────────────────────────
   Musivum.dev — “Artisanal Mosaic × Industrial Datasheet”
   One dominant ink tone, one warm accent, one neutral system.
   ───────────────────────────────────────────────────────────── */

:root {
  --ink: #12100e;
  --ink-2: #1b1815;
  --ink-3: #241f1a;
  --bone: #f0e9df;
  --muted: #9a8f80;
  --line: rgba(240, 233, 223, 0.14);
  --line-strong: rgba(240, 233, 223, 0.28);

  --terra: #d1653f;
  --teal: #3f8f86;
  --gold: #d9a441;

  --display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --maxw: 1180px;
  --gut: clamp(1.25rem, 4vw, 3.5rem);
  --radius: 3px;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

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

body {
  margin: 0;
  background:
    radial-gradient(1100px 620px at 88% -8%, rgba(209, 101, 63, 0.16), transparent 60%),
    radial-gradient(900px 520px at 6% 8%, rgba(63, 143, 134, 0.12), transparent 55%),
    var(--ink);
  color: var(--bone);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.55vw + 0.9rem, 1.06rem);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Editorial grain — the “paper” under the glaze. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9;
  opacity: 0.35;
  mix-blend-mode: overlay;
  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='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.mono { font-family: var(--mono); font-size: 0.82em; letter-spacing: 0.02em; }
.muted { color: var(--muted); }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gold);
  color: var(--ink);
  padding: 0.6rem 1rem;
  z-index: 20;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* ── Topbar ─────────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem var(--gut);
  backdrop-filter: blur(6px);
  background: linear-gradient(var(--ink) 55%, rgba(18, 16, 14, 0.72));
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-family: var(--display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.wordmark__dot { color: var(--terra); }

.topbar__nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
.topbar__nav a { text-decoration: none; color: var(--muted); transition: color 0.2s var(--ease); }
.topbar__nav a:hover { color: var(--bone); }

.topbar__cta {
  border: 1px solid var(--line-strong);
  padding: 0.4rem 0.8rem;
  color: var(--bone) !important;
}
.topbar__cta:hover { border-color: var(--terra); color: var(--terra) !important; }

@media (max-width: 720px) {
  .topbar__nav a:not(.topbar__cta) { display: none; }
}

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 6rem) var(--gut) clamp(3rem, 8vw, 7rem);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--muted);
  margin: 0 0 1.25rem;
  padding-left: 2.6rem;
  position: relative;
}
.eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2rem;
  height: 1px;
  background: var(--terra);
}

.hero h1 {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(2.9rem, 8vw, 5.6rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  margin: 0 0 1.4rem;
}
.hero h1 em { color: var(--terra); font-style: italic; }

.lede {
  font-size: clamp(1.02rem, 0.4vw + 1rem, 1.22rem);
  max-width: 34ch;
  color: #ded4c6;
  margin: 0 0 2rem;
}
.lede strong { color: var(--gold); font-weight: 600; }

.actions { display: flex; gap: 0.85rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  transition: transform 0.18s var(--ease), background 0.2s, color 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn--accent { background: var(--terra); color: var(--ink); font-weight: 500; }
.btn--accent:hover { background: var(--gold); }
.btn--ghost { border-color: var(--line-strong); color: var(--bone); }
.btn--ghost:hover { border-color: var(--teal); color: var(--teal); }

.ticker {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 1.5rem;
  justify-content: start;
  margin: 2.75rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}
.ticker dt {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.ticker dd { margin: 0.3rem 0 0; font-weight: 600; }
@media (max-width: 520px) { .ticker { grid-template-columns: repeat(2, auto); } }

.etym {
  margin: -1.1rem 0 2rem;
  max-width: 42ch;
  font-size: 0.82rem;
  color: var(--muted);
}
.etym .mono { color: var(--gold); }

/* Inline links inside the spec chips */
.specs a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--line-strong); }
.specs a:hover { color: var(--terra); border-color: var(--terra); }

.subhead {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  letter-spacing: -0.01em;
  margin: 3rem 0 0.5rem;
}

/* Tessella environment variables — datasheet style */
.envlist { margin: 1rem 0 0; }
.envlist dt {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--gold);
  padding-top: 0.75rem;
}
.envlist dd {
  margin: 0.25rem 0 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--line);
  color: #d6ccbe;
}

/* ── The mosaic (differentiation anchor) ────────────────────── */
.mosaic { margin: 0; }

.mosaic__grid {
  --cols: 12;
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
  transform: rotate(-1.1deg);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.9);
}

.tile {
  aspect-ratio: 1;
  background: var(--ink-2);
  border: 1px solid rgba(240, 233, 223, 0.05);
  opacity: 0;
  animation: tile-in 0.5s var(--ease) forwards;
  animation-delay: var(--delay, 0ms);
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.tile:hover { transform: scale(1.16); z-index: 2; box-shadow: 0 0 22px rgba(209, 101, 63, 0.5); }

.t-terra { background: rgba(209, 101, 63, 0.34); }
.t-teal  { background: rgba(63, 143, 134, 0.32); }
.t-gold  { background: rgba(217, 164, 65, 0.26); }
.t-bone  { background: rgba(240, 233, 223, 0.14); }
.t-slate { background: rgba(240, 233, 223, 0.05); }

.tile--lit { animation: tile-in 0.5s var(--ease) forwards, ember 5s ease-in-out infinite; animation-delay: var(--delay, 0ms), var(--delay, 0ms); }
.t-terra.tile--lit { box-shadow: 0 0 16px rgba(209, 101, 63, 0.55); }
.t-teal.tile--lit  { box-shadow: 0 0 16px rgba(63, 143, 134, 0.5); }
.t-gold.tile--lit  { box-shadow: 0 0 16px rgba(217, 164, 65, 0.5); }

@keyframes tile-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes ember { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(1.5); } }

.mosaic figcaption {
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--muted);
  text-align: right;
  transform: rotate(-1.1deg);
}

/* ── Sections ───────────────────────────────────────────────── */
section { max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem, 7vw, 6rem) var(--gut); }

.section-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.section-title .num {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--terra);
  border: 1px solid var(--line-strong);
  padding: 0.25rem 0.5rem;
  transform: translateY(-0.35rem);
}
.section-lede { max-width: 58ch; color: #d6ccbe; margin: 0 0 2.5rem; }

/* ── Planes ─────────────────────────────────────────────────── */
.planes__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 780px) { .planes__grid { grid-template-columns: 1fr; } }

.card {
  border: 1px solid var(--line);
  padding: 1.75rem;
  background: linear-gradient(180deg, rgba(240, 233, 223, 0.05), rgba(240, 233, 223, 0.01));
  position: relative;
}
.card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 1.75rem;
  bottom: 1.75rem;
  width: 2px;
  background: var(--teal);
}
.card--control::before { background: var(--terra); }
.card--data { transform: translateY(1.5rem); }
@media (max-width: 780px) { .card--data { transform: none; } }

.card h3 {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}
.tag {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.62rem;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  padding: 0.2rem 0.45rem;
}
.card p { margin: 0 0 1.25rem; color: #d6ccbe; }

.specs { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.specs li {
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--muted);
  border: 1px dashed var(--line);
  padding: 0.3rem 0.6rem;
}
.specs b { color: var(--gold); font-weight: 500; }

/* ── Pipeline ───────────────────────────────────────────────── */
.pipe {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  position: relative;
}
@media (max-width: 780px) { .pipe { grid-template-columns: 1fr 1fr; } }

.pipe__node {
  border: 1px solid var(--line);
  padding: 1.1rem 1rem 1.2rem;
  background: var(--ink-2);
  position: relative;
  animation: tile-in 0.6s var(--ease) backwards;
}
.pipe__node:nth-child(2) { animation-delay: 0.12s; }
.pipe__node:nth-child(3) { animation-delay: 0.24s; }
.pipe__node:nth-child(4) { animation-delay: 0.36s; }

.pipe__node::after {
  content: "";
  position: absolute;
  right: -1rem;
  top: 50%;
  width: 1rem;
  height: 1px;
  background: var(--terra);
}
.pipe__node:last-child::after { display: none; }
@media (max-width: 780px) { .pipe__node::after { display: none; } }

.pipe__idx {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink);
  background: var(--gold);
  width: 1.35rem;
  height: 1.35rem;
  display: grid;
  place-items: center;
  margin-bottom: 0.7rem;
}
.pipe__name { display: block; font-weight: 600; }
.pipe__meta { display: block; font-family: var(--mono); font-size: 0.72rem; color: var(--muted); margin-top: 0.35rem; }

.how__notes { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2rem; border-top: 1px solid var(--line); padding-top: 1.5rem; }
@media (max-width: 780px) { .how__notes { grid-template-columns: 1fr; gap: 0.75rem; } }
.how__notes p { margin: 0; }
.how__notes b { color: var(--gold); font-weight: 600; }

/* ── Karma ──────────────────────────────────────────────────── */
.karma { display: grid; gap: 0.85rem; margin-bottom: 1.5rem; }
.karma__row { display: grid; grid-template-columns: 6.5rem 1fr auto; align-items: center; gap: 1rem; }
@media (max-width: 620px) { .karma__row { grid-template-columns: 5rem 1fr; } .karma__val { display: none; } }

.karma__key { text-transform: uppercase; letter-spacing: 0.1em; color: var(--bone); }
.karma__bar { height: 0.65rem; background: rgba(240, 233, 223, 0.07); border: 1px solid var(--line); overflow: hidden; }
.karma__bar i {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  background: linear-gradient(90deg, var(--teal), var(--terra));
  transform-origin: left;
  animation: grow 1.1s var(--ease) backwards;
}
.karma__row:nth-child(2) .karma__bar i { animation-delay: 0.1s; }
.karma__row:nth-child(3) .karma__bar i { animation-delay: 0.2s; }
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.karma__val { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); white-space: nowrap; }

/* ── Code ───────────────────────────────────────────────────── */
.code { border: 1px solid var(--line); background: #0d0c0a; overflow: hidden; }
.code__bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: rgba(240, 233, 223, 0.03);
}
.dot { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--line-strong); }
.dot:first-child { background: var(--terra); }
.dot:nth-child(2) { background: var(--gold); }
.dot:nth-child(3) { background: var(--teal); }
.code__title { margin-left: auto; color: var(--muted); }

.code pre, .mini { margin: 0; overflow-x: auto; }
.code pre { padding: 1.4rem 1.25rem; }
.code code, .mini code {
  font-family: var(--mono);
  font-size: 0.83rem;
  line-height: 1.75;
  color: #d8cfc1;
}
.code .c { color: #6f6455; }
.mini { border: 1px solid var(--line); background: #0d0c0a; margin-top: 1.25rem; }
.mini code { display: block; padding: 1rem 1.1rem; white-space: pre; }

/* ── Deploy ─────────────────────────────────────────────────── */
.deploy__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 780px) { .deploy__grid { grid-template-columns: 1fr; } }

.deploy__opt { border: 1px solid var(--line); padding: 1.75rem; background: var(--ink-2); }
.deploy__opt--alt { background: linear-gradient(180deg, rgba(63, 143, 134, 0.12), transparent 70%); border-color: rgba(63, 143, 134, 0.4); }
.deploy__opt h3 { font-family: var(--display); font-weight: 600; font-size: 1.4rem; margin: 0.5rem 0 0.75rem; }
.deploy__opt p { margin: 0 0 1rem; color: #d6ccbe; }
.deploy__opt .mono { color: var(--gold); }

/* ── Status ─────────────────────────────────────────────────── */
.status__list { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 2.5rem; }
@media (max-width: 720px) { .status__list { columns: 1; } }
.status__list li { break-inside: avoid; padding: 0.55rem 0 0.55rem 1.75rem; position: relative; border-bottom: 1px dashed var(--line); }
.status__list li::before {
  position: absolute;
  left: 0;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.status__list li[data-state="done"]::before { content: "▣"; color: var(--teal); }
.status__list li[data-state="wip"]::before { content: "▢"; color: var(--muted); }
.status__list li[data-state="wip"] { color: var(--muted); }

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem var(--gut) 4rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer__brand { font-family: var(--display); font-weight: 900; font-size: 1.3rem; margin: 0; }
.footer nav { display: flex; gap: 1.25rem; font-family: var(--mono); font-size: 0.78rem; }
.footer nav a { color: var(--muted); text-decoration: none; }
.footer nav a:hover { color: var(--terra); }
.footer__note { margin: 0 0 0 auto; color: var(--muted); font-size: 0.78rem; }
@media (max-width: 620px) { .footer__note { margin: 0; } }

/* ── Manual ─────────────────────────────────────────────────── */
.manual section { padding-block: clamp(2.25rem, 5vw, 3.5rem); scroll-margin-top: 5rem; }
.manual .section-title { border-top: 1px solid var(--line); padding-top: 1.1rem; }
.manual p { max-width: 74ch; }
.manual a { color: var(--gold); text-decoration: none; border-bottom: 1px solid rgba(217, 164, 65, 0.35); }
.manual a:hover { color: var(--terra); border-color: var(--terra); }

.hero--doc { display: block; padding-bottom: clamp(2rem, 5vw, 3.5rem); }
.hero--doc h1 { max-width: 26ch; }
.hero--doc .lede { max-width: 62ch; }

.toc {
  list-style: none;
  counter-reset: toc;
  margin: 2.5rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 0.25rem 2rem;
}
.toc li { counter-increment: toc; break-inside: avoid; }
.toc a {
  display: block;
  padding: 0.5rem 0 0.5rem 2.6rem;
  position: relative;
  border-bottom: 1px dashed var(--line);
  color: var(--bone);
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}
.toc a:hover { color: var(--terra); border-bottom-color: var(--terra); }
.toc a:hover::before { color: var(--terra); }

.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; }
.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.75rem 3.25rem;
  max-width: 80ch;
}
.steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 2.2rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--teal);
  border-top: 1px solid rgba(63, 143, 134, 0.5);
  padding-top: 0.35rem;
}
.steps > li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 2rem;
  bottom: 0;
  width: 1px;
  background: var(--line);
}
.steps li > b { color: var(--gold); font-weight: 600; }
.steps .mini { margin-top: 0.85rem; }

.note {
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--teal);
  background: linear-gradient(90deg, rgba(63, 143, 134, 0.1), transparent 60%);
  padding: 1.1rem 1.25rem;
  margin: 1.5rem 0;
  max-width: 82ch;
}
.note--warn {
  border-left-color: var(--terra);
  background: linear-gradient(90deg, rgba(209, 101, 63, 0.12), transparent 60%);
}
.note__label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.5rem;
}
.note p { margin: 0 0 0.75rem; color: #d6ccbe; }
.note p:last-child { margin-bottom: 0; }
.note .mini { margin: 0.9rem 0 0; }

.up {
  display: inline-block;
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  border-bottom: none !important;
  color: var(--muted) !important;
}
.up:hover { color: var(--terra) !important; }

.manual .envlist dt { align-items: baseline; }
.manual .envlist dd .mini { margin-top: 0.6rem; }

/* ── Motion preferences ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .tile { opacity: 1; }
}