/* Fihrist home page: the same "stone star-map" design system as app.fihrist.earth
   (charcoal stone, copper hairlines, white glowing selection, Exo 2 caps, IBM Plex Mono numbers). */
@font-face { font-family: 'Inter'; font-weight: 400; font-display: swap; src: url(fonts/inter-latin-400-normal.woff2) format('woff2'); }
@font-face { font-family: 'Inter'; font-weight: 600; font-display: swap; src: url(fonts/inter-latin-600-normal.woff2) format('woff2'); }
@font-face { font-family: 'Exo 2'; font-weight: 500; font-display: swap; src: url(fonts/exo-2-latin-500-normal.woff2) format('woff2'); }
@font-face { font-family: 'Exo 2'; font-weight: 600; font-display: swap; src: url(fonts/exo-2-latin-600-normal.woff2) format('woff2'); }
@font-face { font-family: 'Exo 2'; font-weight: 700; font-display: swap; src: url(fonts/exo-2-latin-700-normal.woff2) format('woff2'); }
@font-face { font-family: 'IBM Plex Mono'; font-weight: 400; font-display: swap; src: url(fonts/ibm-plex-mono-latin-400-normal.woff2) format('woff2'); }

:root {
  --ink: #131518; --panel: #1E2126; --panel-2: #2A2E34;
  --parchment: #ECE8E1; --pill: #F2EFEA; --slate: #A3A9B1; --slate-dim: #7A8088;
  --copper: #C98B66; --copper-glow: #E8B391; --teal: #6FD6BF; --frost: #9CC2F2; --terracotta: #F08C74;
  --display: 'Exo 2', Inter, system-ui, sans-serif; --sans: Inter, system-ui, sans-serif; --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --select: 0 0 0 2px rgba(255,255,255,.18), 0 0 14px rgba(255,255,255,.55), 0 0 32px -4px rgba(190,205,255,.45);
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { background: #131518 radial-gradient(120% 90% at 55% 35%, #2E3238 0%, #202328 45%, #111315 100%) fixed; scroll-behavior: smooth; }
body { margin: 0; color: var(--parchment); font: 400 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; background: transparent; min-height: 100vh; overflow-x: hidden; }
a { color: var(--copper-glow); text-underline-offset: 3px; }
a:hover { color: var(--parchment); }
:focus-visible { outline: 2px solid var(--pill); outline-offset: 3px; }
::selection { background: rgba(201, 139, 102, 0.4); }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }
.skip { position: absolute; left: -9999px; top: 12px; z-index: 2000; }
.skip:focus { left: 16px; }

/* fixed star-map background (built by main.js; the html gradient is the no-JS fallback) */
#starmap { position: fixed; inset: 0; z-index: -1; pointer-events: none; width: 100%; height: 100%; }
@keyframes orbit { to { transform: rotate(360deg); } }

/* ---------- type ---------- */
.eyebrow { font: 500 11px var(--display); letter-spacing: 0.24em; text-transform: uppercase; color: var(--slate); margin: 0 0 14px; display: flex; align-items: center; gap: 10px; }
.eyebrow::before { content: ''; width: 18px; height: 1px; background: var(--copper); box-shadow: 0 0 8px rgba(201,139,102,.8); }
h1, h2, h3 { font-family: var(--display); margin: 0; text-wrap: balance; }
h1 { font-size: clamp(38px, 6.2vw, 76px); line-height: 1.02; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; max-width: 13ch; }
h1 .glow { color: var(--pill); text-shadow: 0 0 18px rgba(255,255,255,.35), 0 0 42px rgba(190,205,255,.25); }
h1 .cu { color: var(--copper-glow); text-shadow: 0 0 22px rgba(201,139,102,.45); }
h2 { font-size: clamp(26px, 3.6vw, 40px); line-height: 1.1; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px; }
h3 { font-size: 15px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 10px; color: var(--parchment); }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.lead { font-size: clamp(16px, 1.6vw, 19px); color: var(--slate); max-width: 58ch; margin: 22px 0 32px; }
.intro { color: var(--slate); max-width: 66ch; margin: 0 0 40px; font-size: 16.5px; }

/* node rule o────o */
.node-rule { position: relative; height: 1px; background: rgba(163,169,177,.35); margin: 0 0 40px; }
.node-rule::before, .node-rule::after { content: ''; position: absolute; top: -2px; width: 5px; height: 5px; border-radius: 9999px; background: var(--slate); }
.node-rule::before { left: -2px; } .node-rule::after { right: -2px; }

/* ---------- header (same as the app TopBar) ---------- */
.top { position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid rgba(255,255,255,.06); background: linear-gradient(to bottom, rgba(14,16,18,.95), rgba(22,24,27,.85)); backdrop-filter: blur(8px); }
.top .wrap { display: flex; align-items: center; gap: 28px; min-height: 64px; max-width: 1600px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand svg { flex: none; }
.brand .ring { transform-origin: 18px 18px; animation: orbit 18s linear infinite; }
.brand b { display: block; font: 600 18px var(--display); letter-spacing: 0.34em; text-transform: uppercase; color: var(--parchment); line-height: 1; }
.brand small { display: block; margin-top: 5px; font: 400 10px var(--sans); letter-spacing: 0.22em; text-transform: uppercase; color: var(--slate); }
.tabs { display: flex; gap: 30px; margin-left: auto; }
.tab { position: relative; padding: 8px 2px; font: 500 12px var(--display); letter-spacing: 0.22em; text-transform: uppercase; color: var(--slate); text-decoration: none; transition: color .2s; white-space: nowrap; }
.tab:hover, .tab.on { color: var(--parchment); }
.tab::after { content: ''; position: absolute; left: 50%; right: 50%; bottom: -2px; height: 3px; border-radius: 2px; background: var(--copper); box-shadow: 0 0 8px rgba(201,139,102,.7); transition: left .25s, right .25s; }
.tab:hover::after, .tab.on::after { left: 15%; right: 15%; }
@media (max-width: 980px) { .tabs { display: none; } .top .pill { margin-left: auto; } .brand small { display: none; } }

/* buttons: white glowing pill (= selected pill in the app) and outlined chip */
.pill, .chip { display: inline-flex; align-items: center; gap: 10px; border-radius: 9999px; padding: 11px 22px; font: 600 13px var(--display); letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none; white-space: nowrap; transition: transform .2s, box-shadow .2s, background .2s, border-color .2s, color .2s; }
.pill { background: var(--pill); color: var(--ink); border: 1px solid #fff; box-shadow: var(--select); }
.pill:hover { color: var(--ink); transform: translateY(-1px); box-shadow: 0 0 0 2px rgba(255,255,255,.25), 0 0 20px rgba(255,255,255,.7), 0 0 44px -2px rgba(190,205,255,.6); }
.pill .arr { transition: transform .2s; }
.pill:hover .arr { transform: translateX(3px); }
.chip { border: 1px solid rgba(236,232,225,.25); background: rgba(0,0,0,.2); color: var(--parchment); }
.chip:hover { color: var(--parchment); border-color: rgba(236,232,225,.6); background: rgba(255,255,255,.04); }
.top .pill { padding: 8px 16px; font-size: 11px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- hero with the hologram ---------- */
.hero { position: relative; min-height: calc(100vh - 64px); min-height: calc(100svh - 64px); display: flex; align-items: center; overflow: hidden; padding: 72px 0 64px; }
#holo { position: absolute; inset: 0; width: 100%; height: 100%; filter: drop-shadow(0 0 6px rgba(111,214,191,.25)); }
.hero::after { /* hologram scanlines */
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(255,255,255,.025) 0 1px, transparent 1px 3px);
  mask-image: radial-gradient(60% 70% at 70% 55%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(60% 70% at 70% 55%, #000 30%, transparent 75%);
}
.hero::before { /* keeps the text readable over the hologram */
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(17,19,21,.82) 0%, rgba(17,19,21,.55) 34%, rgba(17,19,21,0) 56%);
}
.hero .wrap { width: 100%; z-index: 1; }
.hero-text { max-width: 640px; }
.hero .lead { text-shadow: 0 1px 12px rgba(0,0,0,.8); }
.telemetry { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 56px; max-width: 760px; }
.telemetry div { padding: 14px 16px; border-left: 1px solid rgba(201,139,102,.6); background: linear-gradient(90deg, rgba(201,139,102,.08), transparent); }
.telemetry b { display: block; font: 400 26px var(--mono); color: var(--pill); letter-spacing: -0.01em; }
.telemetry span { font: 500 10px var(--display); letter-spacing: 0.18em; text-transform: uppercase; color: var(--slate); }
.scroll-cue { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); z-index: 1; font: 500 10px var(--display); letter-spacing: .3em; text-transform: uppercase; color: var(--slate-dim); text-decoration: none; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.scroll-cue i { width: 1px; height: 34px; background: linear-gradient(var(--copper), transparent); animation: cue 2.2s ease-in-out infinite; transform-origin: top; }
@keyframes cue { 0% { transform: scaleY(0); opacity: 1; } 60% { transform: scaleY(1); opacity: 1; } 100% { transform: scaleY(1); opacity: 0; } }
@media (max-width: 900px) {
  .hero { align-items: flex-start; padding-top: 48px; padding-bottom: 46vh; }
  .hero::before { background: linear-gradient(180deg, rgba(17,19,21,.7) 0%, rgba(17,19,21,.4) 55%, rgba(17,19,21,0) 70%); }
  .hero::after { mask-image: radial-gradient(90% 40% at 50% 80%, #000 30%, transparent 75%); -webkit-mask-image: radial-gradient(90% 40% at 50% 80%, #000 30%, transparent 75%); }
  .telemetry { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 36px; }
  .scroll-cue { display: none; }
}

/* ---------- sections ---------- */
section { padding: 96px 0; position: relative; }
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1000px) { .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .g3 { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .g2, .g4 { grid-template-columns: 1fr; } section { padding: 72px 0; } }

/* stone slab card (same as the app's .slab) */
.slab {
  position: relative; padding: 26px; border: 1px solid rgba(201,139,102,.5); border-radius: 6px 6px 40px 6px;
  background: var(--grain), linear-gradient(165deg, rgba(52,57,64,.62) 0%, rgba(30,33,38,.82) 55%, rgba(20,22,25,.9) 100%);
  background-size: 220px 220px, auto; background-blend-mode: soft-light, normal;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05), 0 24px 50px -30px rgba(0,0,0,.95);
  transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .35s, box-shadow .35s;
}
.slab:hover { transform: translateY(-4px); border-color: rgba(232,179,145,.85); box-shadow: inset 0 1px 0 rgba(255,255,255,.07), 0 0 24px -6px rgba(201,139,102,.45), 0 30px 60px -30px rgba(0,0,0,.95); }
.slab p { color: var(--slate); margin: 0; font-size: 15px; }
.slab::before { /* copper corner tick */
  content: ''; position: absolute; top: -1px; left: 18px; width: 34px; height: 2px; background: var(--copper); box-shadow: 0 0 10px rgba(201,139,102,.9);
}
.step { display: block; font: 400 12px var(--mono); color: var(--copper-glow); letter-spacing: .1em; margin-bottom: 14px; }
.icon { width: 40px; height: 40px; margin-bottom: 16px; color: var(--copper-glow); }
.tag { display: inline-block; font: 600 10px var(--display); letter-spacing: .16em; text-transform: uppercase; padding: 3px 10px; border-radius: 9999px; margin-bottom: 14px; border: 1px solid; }
.tag-now { color: var(--teal); border-color: rgba(111,214,191,.45); background: rgba(111,214,191,.08); }
.tag-next { color: var(--frost); border-color: rgba(156,194,242,.45); background: rgba(156,194,242,.08); }
.slab ul { margin: 14px 0 0; padding: 0; list-style: none; color: var(--slate); font-size: 14.5px; }
.slab li { padding-left: 18px; position: relative; }
.slab li + li { margin-top: 6px; }
.slab li::before { content: ''; position: absolute; left: 2px; top: 10px; width: 6px; height: 6px; border-radius: 9999px; border: 1px solid var(--copper); }

/* discovery */
.finding { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.finding > *, .grid > *, .about > * { min-width: 0; }
@media (max-width: 900px) { .finding { grid-template-columns: 1fr; } }
.note { border-left: 2px solid var(--copper); padding: 6px 0 6px 18px; color: var(--slate); font-size: 15px; margin: 24px 0 0; background: linear-gradient(90deg, rgba(201,139,102,.08), transparent 70%); }
.note strong, .intro strong { color: var(--parchment); font-weight: 600; }
.tablewrap { overflow-x: auto; padding: 8px 0 0; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { padding: 13px 14px; text-align: right; border-bottom: 1px solid rgba(255,255,255,.07); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; white-space: normal; }
thead th { font: 500 10px var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--slate); }
tbody th { font: 400 14px var(--sans); color: var(--parchment); }
td { font-family: var(--mono); color: var(--pill); }
td small { color: var(--slate-dim); }
td.hot { color: var(--terracotta); }
.caption { font-size: 12.5px; color: var(--slate); margin: 14px 0 0; }

/* validation metrics */
.metric b { display: block; font: 400 44px var(--mono); line-height: 1.1; margin-bottom: 10px; }
.metric .good { color: var(--teal); text-shadow: 0 0 22px rgba(111,214,191,.35); }
.metric .warn { color: var(--terracotta); text-shadow: 0 0 22px rgba(240,140,116,.3); }

/* about */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
@media (max-width: 900px) { .about { grid-template-columns: 1fr; } }
.about p { color: var(--slate); margin: 0 0 16px; }
.banner { display: flex; gap: 12px; align-items: center; border: 1px solid rgba(201,139,102,.45); border-radius: 6px 6px 24px 6px; padding: 16px 20px; color: var(--parchment); margin-top: 8px; background: rgba(0,0,0,.25); }
.banner::before { content: ''; flex: none; width: 8px; height: 8px; border-radius: 9999px; background: var(--copper); box-shadow: 0 0 10px var(--copper); }

/* final */
.final { text-align: center; padding: 120px 0; }
.final h2 { max-width: 20ch; margin-left: auto; margin-right: auto; }
.final .lead { margin-left: auto; margin-right: auto; }
.final .cta { justify-content: center; }
.astro { width: 88px; height: 88px; margin: 0 auto 28px; position: relative; }
.astro svg { position: absolute; inset: 0; overflow: visible; }
.astro .a1 { animation: orbit 14s linear infinite; }
.astro .a2 { animation: orbit 4s linear infinite reverse; }

footer { padding: 40px 0 64px; color: var(--slate); font-size: 13.5px; border-top: 1px solid rgba(255,255,255,.06); background: rgba(10,11,13,.5); }
footer .wrap { display: grid; gap: 14px; }
footer p { margin: 0; }

/* ---------- motion ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .9s cubic-bezier(.2,.8,.2,1), transform .9s cubic-bezier(.2,.8,.2,1); transition-delay: calc(var(--d, 0) * 1ms); }
.js [data-reveal].in { opacity: 1; transform: none; }
.js .hero [data-reveal] { transform: translateY(18px); }
.decode { white-space: pre-wrap; }

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