/* Alkahest website. Colours, type and component shapes come from the Alembic design system
   (design/tokens.json, dark theme); keep them in sync with the tokens rather than inventing new
   ones. Brass = the one primary action per view, verdigris = live, signal blue = loading,
   cinnabar = destructive. */

@font-face { font-family: "Schibsted Grotesk"; src: url("fonts/SchibstedGrotesk-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Schibsted Grotesk"; src: url("fonts/SchibstedGrotesk-Medium.ttf") format("truetype"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Schibsted Grotesk"; src: url("fonts/SchibstedGrotesk-SemiBold.ttf") format("truetype"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Schibsted Grotesk"; src: url("fonts/SchibstedGrotesk-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-Medium.ttf") format("truetype"); font-weight: 500; font-display: swap; }

:root {
  color-scheme: dark;
  --bg-base: #0F1214;
  --bg-sidebar: #121518;
  --bg-raised: #161A1D;
  --bg-overlay: #1D2226;
  --bg-code: #0B0D0F;
  --line-subtle: #22272C;
  --line: #2A3036;
  --line-strong: #343B42;
  --line-dashed: #4A5157;
  --text: #E8E6E1;
  --text-2: #C9CDD1;
  --text-muted: #A7ADB3;
  --text-faint: #7C848C;
  --on-accent: #1A1206;
  --accent: #E3A63B;
  --accent-text: #F2C46E;
  --accent-subtle: #2B2414;
  --accent-border: #6B5320;
  --focus: #E3A63B2E;
  --ok: #46B5A0;
  --ok-text: #6FD3BF;
  --ok-subtle: #15302B;
  --info: #6EA8E6;
  --info-text: #9CC4F0;
  --info-subtle: #17263A;
  --danger: #E5664F;
  --danger-text: #F08A75;
  --danger-subtle: #2A1714;

  --kind-chat: #E3A63B;
  --kind-embeddings: #8E9BF0;
  --kind-rerank: #6FB3E8;
  --kind-vision: #46B5A0;
  --kind-audio: #E08FC8;
  --kind-image: #EB8A5E;
  --kind-video: #B79CF2;
  --kind-decision: #A9C45A;

  --sans: "Schibsted Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 10px;
  --radius-lg: 16px;
  --wrap: 1180px;
  --gutter: 24px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-2);
  font: 400 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, pre, .mono { font-family: var(--mono); }
h1, h2, h3, h4 { color: var(--text); font-weight: 600; margin: 0; letter-spacing: -0.02em; line-height: 1.15; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow {
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.eyebrow b { color: var(--accent); font-weight: 500; }
section { padding: 112px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(30px, 4vw, 44px); margin: 14px 0 16px; }
.section-head p { font-size: 18px; color: var(--text-muted); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.alt { background: var(--bg-sidebar); border-top: 1px solid var(--line-subtle); border-bottom: 1px solid var(--line-subtle); }

/* Buttons: one brass button per view. */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 46px; padding: 0 20px;
  border-radius: var(--radius);
  font: 600 15px/1 var(--sans);
  border: 1px solid var(--line-strong);
  background: var(--bg-raised);
  color: var(--text);
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .15s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; border-color: var(--line-dashed); background: var(--bg-overlay); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-text); border-color: var(--accent-text); transform: translateY(-1px); }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn small { font: 400 12px/1 var(--mono); opacity: .75; }

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg-base) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-subtle);
}
.nav .wrap { display: flex; align-items: center; height: 64px; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font: 600 21px/1 var(--sans); letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand img { width: 26px; height: 26px; }
.nav-links { display: flex; gap: 22px; margin-left: 12px; }
.nav-links a { color: var(--text-muted); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; font: 500 12px/1 var(--mono); }
.lang a, .lang span { padding: 8px 10px; color: var(--text-faint); }
.lang span { background: var(--accent-subtle); color: var(--accent-text); }
.lang a:hover { color: var(--text); text-decoration: none; }
.nav .btn { height: 36px; padding: 0 14px; font-size: 14px; }
.icon-link { display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 8px; color: var(--text-muted); border: 1px solid var(--line); }
.icon-link:hover { color: var(--text); border-color: var(--line-strong); }
.icon-link svg { width: 18px; height: 18px; }

/* Hero */
.hero { padding: 88px 0 120px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-subtle) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 20%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 20%, #000 20%, transparent 75%);
  opacity: .55;
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; width: 900px; height: 900px; left: 50%; top: -420px; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(227,166,59,.16), transparent 62%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }
.hero-copy { text-align: center; max-width: 880px; margin: 0 auto; }
.release-pill {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px 6px 8px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-raised);
  font: 500 13px/1 var(--mono); color: var(--text-muted);
}
.release-pill:hover { text-decoration: none; border-color: var(--accent-border); color: var(--text); }
.release-pill .dot-tag { background: var(--ok-subtle); color: var(--ok-text); padding: 4px 8px; border-radius: 999px; }
.hero h1 { font-size: clamp(42px, 7vw, 84px); margin: 28px 0 22px; letter-spacing: -0.035em; line-height: 1.02; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { font-size: clamp(18px, 2.1vw, 22px); color: var(--text-muted); max-width: 720px; margin: 0 auto; }
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-top: 36px; flex-wrap: wrap; }
.hero-terminal {
  margin: 28px auto 0; max-width: 520px;
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-code); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 12px 12px 16px; font: 400 14px/1.4 var(--mono); color: var(--text-2);
  text-align: left;
}
.hero-terminal .prompt { color: var(--accent); }
.hero-terminal code { flex: 1; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
.copy {
  flex: none; border: 1px solid var(--line); background: var(--bg-raised); color: var(--text-muted);
  border-radius: 6px; height: 30px; padding: 0 10px; font: 500 12px/1 var(--mono); cursor: pointer;
}
.copy:hover { color: var(--text); border-color: var(--line-strong); }
.copy.done { color: var(--ok-text); border-color: var(--ok); }

.showcase { position: relative; margin: 72px auto 0; max-width: 1080px; }
.window {
  border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--bg-raised);
  box-shadow: 0 40px 120px -20px rgba(0,0,0,.7), 0 0 0 1px rgba(227,166,59,.05);
}
.window-bar { height: 36px; display: flex; align-items: center; gap: 8px; padding: 0 14px; background: var(--bg-sidebar); border-bottom: 1px solid var(--line-subtle); }
.window-bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--line-strong); }
.window-bar span { margin: 0 auto; font: 400 12px/1 var(--mono); color: var(--text-faint); transform: translateX(-24px); }
.float {
  position: absolute; z-index: 2;
  background: var(--bg-overlay); border: 1px solid var(--line-strong); border-radius: 12px;
  padding: 14px 16px; box-shadow: 0 20px 50px -10px rgba(0,0,0,.6);
  font-size: 13px;
  animation: bob 6s ease-in-out infinite;
}
.float .eyebrow { font-size: 10px; margin-bottom: 10px; display: block; }
.float.f1 { left: -56px; top: 22%; }
.float.f2 { right: -48px; top: 52%; animation-delay: -3s; }
.float.f3 { right: 10%; bottom: -30px; animation-delay: -1.5s; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@media (prefers-reduced-motion: reduce) { .float { animation: none; } html { scroll-behavior: auto; } }

/* Pills and badges, same shapes as the desktop app */
.pill { display: inline-flex; align-items: center; gap: 7px; padding: 5px 10px; border-radius: 999px; font: 500 12px/1 var(--sans); white-space: nowrap; }
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pill.gpu { background: #15302B; color: #6FD3BF; }
.pill.split { background: #2B2414; color: #F2C46E; }
.pill.cpu { background: #22272C; color: #C9CDD1; }
.pill.loading { background: #17263A; color: #9CC4F0; }
.pill.idle { background: transparent; color: var(--text-faint); border: 1px solid var(--line); }
.stack { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; border-radius: 6px; font: 500 13px/1 var(--sans); color: var(--k); background: color-mix(in srgb, var(--k) 15%, transparent); }
.badge .g { font-size: 12px; }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 4px 8px; border-radius: 6px; border: 1px solid var(--line-strong); font: 400 12px/1 var(--mono); color: var(--text-2); white-space: nowrap; }
.tag.ternary { border-color: var(--accent-border); color: var(--accent-text); }
.tag.ro { border-style: dashed; border-color: var(--line-dashed); }

/* Funnel: many sources, one core, one API */
.funnel { display: grid; grid-template-columns: 1fr 260px 1fr; gap: 40px; align-items: center; }
.flow-col { display: flex; flex-direction: column; gap: 12px; }
.flow-col h3 { font: 500 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 6px; }
.flow-col.right h3 { text-align: right; }
.flow-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: var(--radius);
  background: var(--bg-raised); border: 1px solid var(--line);
  position: relative;
}
.flow-item b { color: var(--text); font-weight: 600; display: block; font-size: 15px; }
.flow-item span { font: 400 12px/1.4 var(--mono); color: var(--text-faint); }
.flow-item .ic { flex: none; width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; background: var(--bg-overlay); color: var(--accent); font: 600 15px/1 var(--mono); }
.flow-col.left .flow-item::after, .flow-col.right .flow-item::before {
  content: ""; position: absolute; top: 50%; width: 40px; height: 1px;
  background: linear-gradient(90deg, var(--line-strong), var(--accent-border));
}
.flow-col.left .flow-item::after { right: -41px; }
.flow-col.right .flow-item::before { left: -41px; background: linear-gradient(90deg, var(--accent-border), var(--line-strong)); }
.flow-item.ro { border-style: dashed; border-color: var(--line-dashed); }
.core { text-align: center; }
.core svg { width: 100%; max-width: 230px; margin: 0 auto; filter: drop-shadow(0 0 40px rgba(227,166,59,.25)); }
.core .core-label { margin-top: 18px; font: 500 13px/1.6 var(--mono); color: var(--text-muted); }
.core .core-label b { color: var(--accent-text); font-weight: 500; }
.drop { animation: drop 2.4s ease-in infinite; transform-origin: center; }
@keyframes drop { 0% { opacity: 0; transform: translateY(-6px); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(10px); } }
@media (prefers-reduced-motion: reduce) { .drop { animation: none; } }

/* Feature grid */
.grid { display: grid; gap: 16px; }
.grid.g3 { grid-template-columns: repeat(3, 1fr); }
.grid.g2 { grid-template-columns: repeat(2, 1fr); }
.grid.g4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 28px; position: relative; overflow: hidden;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: var(--line-strong); }
.card h3 { font-size: 19px; margin: 18px 0 10px; }
.card p { color: var(--text-muted); font-size: 15px; }
.card .ico {
  width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center;
  background: var(--accent-subtle); color: var(--accent); border: 1px solid var(--accent-border);
}
.card .ico svg { width: 22px; height: 22px; }
.card .ico.ok { background: var(--ok-subtle); color: var(--ok-text); border-color: #22584E; }
.card .ico.info { background: var(--info-subtle); color: var(--info-text); border-color: #284669; }
.card .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }

/* Screens gallery */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; }
.tab {
  border: 1px solid var(--line); background: var(--bg-raised); color: var(--text-muted);
  border-radius: 999px; padding: 9px 16px; font: 500 14px/1 var(--sans); cursor: pointer;
}
.tab:hover { color: var(--text); border-color: var(--line-strong); }
.tab[aria-selected="true"] { background: var(--accent-subtle); border-color: var(--accent-border); color: var(--accent-text); }
.screen-stage { display: grid; grid-template-columns: 1fr 300px; gap: 28px; align-items: start; }
.screen-panel[hidden] { display: none; }
.screen-panel .window img { width: 100%; height: auto; aspect-ratio: 1440 / 1080; object-fit: cover; object-position: top; }
.screen-notes h3 { font-size: 24px; margin-bottom: 12px; }
.screen-notes p { color: var(--text-muted); margin-bottom: 18px; }
.screen-notes ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.screen-notes li { display: flex; gap: 10px; font-size: 15px; }
.screen-notes li::before { content: "◆"; color: var(--accent); font-size: 10px; margin-top: 6px; }

/* Kinds strip */
.kinds { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.kinds .badge { font-size: 16px; padding: 10px 16px; border-radius: 10px; }

/* Engines */
.engine { display: flex; flex-direction: column; }
.engine .head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.engine .head h3 { margin: 0; }
.engine .accel { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 18px; }
.engine p { margin-top: 10px; }
.engine.wide { grid-column: span 2; }

/* API */
.api { display: grid; grid-template-columns: 340px 1fr; gap: 28px; align-items: start; }
.routes { display: flex; flex-direction: column; gap: 14px; }
.route-group { background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.route-group h4 { font-size: 15px; display: flex; align-items: center; justify-content: space-between; }
.route-group h4 span { font: 400 11px/1 var(--mono); color: var(--text-faint); }
.route-group code { display: block; font-size: 12.5px; color: var(--text-muted); margin-top: 8px; line-height: 1.7; }
.route-group code b { color: var(--ok-text); font-weight: 500; margin-right: 6px; }
.code-card { background: var(--bg-code); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.code-card .tabs { margin: 0; padding: 12px; border-bottom: 1px solid var(--line-subtle); background: var(--bg-sidebar); gap: 4px; }
.code-card .tab { border-radius: 8px; padding: 8px 12px; font-size: 13px; }
.code-card pre { margin: 0; padding: 22px 24px; overflow-x: auto; font-size: 13.5px; line-height: 1.7; color: var(--text-2); }
.code-card pre[hidden] { display: none; }
.code-card .c { color: var(--text-faint); }
.code-card .s { color: var(--ok-text); }
.code-card .k { color: var(--accent-text); }
.code-card .n { color: var(--info-text); }
.code-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--line-subtle); font: 400 12px/1.4 var(--mono); color: var(--text-faint); }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-raised); }
.stat { padding: 28px; border-right: 1px solid var(--line-subtle); }
.stat:last-child { border-right: 0; }
.stat .v { font: 500 clamp(30px, 3.6vw, 42px)/1 var(--mono); color: var(--text); letter-spacing: -0.03em; }
.stat .v small { font-size: .5em; color: var(--accent); margin-left: 4px; }
.stat .l { margin-top: 12px; color: var(--text-muted); font-size: 14px; }
.tech { margin-top: 16px; }
.tech .card { padding: 24px; }
.tech .card h3 { margin-top: 0; font-size: 17px; display: flex; gap: 10px; align-items: center; }
.tech .card h3::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--accent); transform: rotate(45deg); flex: none; }
.tech .card p { font-size: 14.5px; }

/* Security */
.sec { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.sec-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.sec-list li { display: grid; grid-template-columns: 36px 1fr; gap: 14px; align-items: start; }
.sec-list .n { width: 36px; height: 36px; border-radius: 8px; display: grid; place-items: center; background: var(--ok-subtle); color: var(--ok-text); font: 500 13px/1 var(--mono); }
.sec-list b { color: var(--text); display: block; margin-bottom: 2px; }
.sec-list span { color: var(--text-muted); font-size: 15px; }

/* Download */
.os-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.os { display: flex; flex-direction: column; gap: 16px; }
.os.detected { border-color: var(--accent-border); box-shadow: 0 0 0 4px var(--focus); }
.os .os-head { display: flex; align-items: center; gap: 14px; }
.os .os-head svg { width: 30px; height: 30px; color: var(--text); }
.os .os-head h3 { margin: 0; font-size: 22px; }
.os .os-head .here { margin-left: auto; font: 500 11px/1 var(--mono); color: var(--accent-text); background: var(--accent-subtle); padding: 5px 8px; border-radius: 6px; display: none; }
.os.detected .os-head .here { display: inline-block; }
.os .btn { width: 100%; justify-content: space-between; }
.os .alts { display: flex; flex-direction: column; gap: 2px; border-top: 1px solid var(--line-subtle); padding-top: 12px; }
.os .alts a { display: flex; justify-content: space-between; gap: 10px; padding: 7px 0; font-size: 14px; color: var(--text-2); }
.os .alts a:hover { color: var(--accent-text); text-decoration: none; }
.os .alts a span { font: 400 12px/1.6 var(--mono); color: var(--text-faint); }
.install-alt { margin-top: 28px; }
.dl-meta { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; margin-top: 24px; font: 400 13px/1.4 var(--mono); color: var(--text-faint); }
.dl-meta a { color: var(--text-muted); }

/* Final call and footer */
.cta-band { text-align: center; padding: 96px 0; }
.cta-band img { width: 72px; height: 72px; margin: 0 auto 28px; }
.cta-band h2 { font-size: clamp(30px, 4.4vw, 48px); max-width: 760px; margin: 0 auto 16px; }
.cta-band p { color: var(--text-muted); font-size: 18px; margin-bottom: 32px; }
footer { border-top: 1px solid var(--line-subtle); padding: 56px 0 40px; font-size: 14px; color: var(--text-faint); background: var(--bg-sidebar); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.foot-brand { display: flex; flex-direction: column; gap: 14px; max-width: 320px; }
.foot-brand span { color: var(--text-muted); }
.foot-col { display: flex; flex-direction: column; gap: 10px; }
.foot-col .eyebrow { margin-bottom: 4px; }
footer a { color: var(--text-muted); }
footer a:hover { color: var(--text); text-decoration: none; }
.foot-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line-subtle); }
.credit { color: var(--text-muted); }
.credit a { color: var(--accent-text); }
.credit strong { color: var(--text); font-weight: 600; }
@media (max-width: 980px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }

/* Reveal on scroll (progressive enhancement: content is visible without JS) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } }

/* Responsive */
@media (max-width: 1100px) {
  .float.f1 { left: -12px; }
  .float.f2 { right: -12px; }
}
@media (max-width: 980px) {
  .nav-links { display: none; }
  .grid.g3, .grid.g4 { grid-template-columns: repeat(2, 1fr); }
  .engine.wide { grid-column: span 2; }
  .funnel { grid-template-columns: 1fr; gap: 28px; }
  .core { order: -1; }
  .core svg { max-width: 140px; }
  .flow-col.left .flow-item::after, .flow-col.right .flow-item::before { display: none; }
  .flow-col.right h3 { text-align: left; }
  .screen-stage, .api, .sec { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line-subtle); }
  .os-grid { grid-template-columns: 1fr; }
  .float { display: none; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  section { padding: 80px 0; }
  .hero { padding: 56px 0 80px; }
  .grid.g3, .grid.g2, .grid.g4 { grid-template-columns: 1fr; }
  .engine.wide { grid-column: auto; }
  .nav .btn { display: none; }
  .stats { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line-subtle); }
  .stat:last-child { border-bottom: 0; }
  .card { padding: 22px; }
  .hero-cta .btn { width: 100%; justify-content: center; }
}

/* Download: only the visitor's system gets the brass button (one primary action per view). */
.os.detected .btn { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.os.detected .btn:hover { background: var(--accent-text); border-color: var(--accent-text); }