/* Silos-Tech preview: dark steel, amber accent. Mobile first. */
:root {
  --bg: #0b0d10;
  --bg2: #10141a;
  --panel: #151a21;
  --line: #262e38;
  --tx: #eef1f4;
  --mut: #9aa6b3;
  --ac: #ffb400;
  --ac2: #ff6a1f;
  --ok: #7fd99a;
  --bad: #ff8a7a;
  --head: "Barlow Condensed", "Arial Narrow", Impact, system-ui, sans-serif;
  --body: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--tx); font: 16px/1.6 var(--body); overflow-x: hidden; }
.wrap { width: min(1200px, 100% - 32px); margin-inline: auto; }
.mono { font-family: var(--mono); }
:focus-visible { outline: 2px solid var(--ac); outline-offset: 3px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 8px; z-index: 50; background: var(--ac); color: #000; padding: 8px 12px; }
.load-error { color: var(--bad); padding: 16px 0; }

h1, h2, h3 { font-family: var(--head); font-weight: 800; line-height: 1.02; margin: 0; text-transform: uppercase; letter-spacing: .01em; }
h2 { font-size: clamp(34px, 6vw, 64px); }
h3 { font-size: 26px; }
.eyebrow { margin: 0 0 10px; color: var(--ac); font: 700 14px var(--head); letter-spacing: .22em; text-transform: uppercase; }
.sec-lead { color: var(--mut); max-width: 58ch; margin: 14px 0 0; font-size: 18px; }

/* header */
.top { position: sticky; top: 0; z-index: 30; background: rgba(11, 13, 16, .82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--tx); text-decoration: none; margin-right: auto; }
.brand-mark { width: 30px; height: 30px; color: var(--ac); }
.brand-name { font: 800 24px var(--head); letter-spacing: .08em; }
.brand-name b { color: var(--ac); font-weight: 800; }
.nav { display: none; gap: 22px; }
.nav a { color: var(--mut); text-decoration: none; font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--ac); }
.lang { display: flex; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.lang button { background: transparent; color: var(--mut); border: 0; padding: 8px 11px; font: 700 12px var(--mono); cursor: pointer; min-height: 36px; }
.lang button[aria-pressed="true"] { background: var(--ac); color: #000; }
@media (min-width: 900px) { .nav { display: flex; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 22px; border: 1px solid transparent; border-radius: 3px; font: 700 15px var(--body); letter-spacing: .02em; text-decoration: none; cursor: pointer; }
.btn-primary { background: var(--ac); color: #111; }
.btn-primary:hover { background: #ffc733; }
.btn-ghost { background: transparent; color: var(--tx); border-color: #3a4552; }
.btn-ghost:hover { border-color: var(--ac); color: var(--ac); }

/* hero */
.hero { position: relative; min-height: min(100svh, 880px); display: grid; align-items: end; overflow: hidden; background: radial-gradient(ellipse at 70% 35%, #1b2430 0%, var(--bg) 70%); }
.hero-canvas { position: absolute; inset: 0; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11, 13, 16, 0) 35%, rgba(11, 13, 16, .92) 100%), linear-gradient(90deg, rgba(11, 13, 16, .75) 0%, rgba(11, 13, 16, 0) 60%); pointer-events: none; }
.hero-in { position: relative; padding: 110px 0 48px; pointer-events: none; }
.hero-in > * { pointer-events: auto; }
.hero h1 { font-size: clamp(44px, 8.5vw, 112px); max-width: 13ch; text-shadow: 0 2px 40px rgba(0, 0, 0, .6); }
.hero .lead { max-width: 52ch; color: #cfd6de; font-size: clamp(16px, 2.2vw, 20px); margin: 20px 0 26px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hint { margin: 22px 0 0; color: var(--mut); font: 500 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; }

/* facts */
.facts { border-block: 1px solid var(--line); background: var(--bg2); }
.facts-in { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; }
.fact { padding: 26px 16px 26px 0; border-bottom: 1px solid var(--line); }
.fact .num { display: block; font: 800 clamp(40px, 8vw, 64px) var(--head); color: var(--ac); line-height: 1; }
.fact span { display: block; margin-top: 8px; color: var(--mut); font-size: 14px; line-height: 1.4; max-width: 26ch; }
@media (min-width: 900px) { .facts-in { grid-template-columns: repeat(5, 1fr); } .fact { border-bottom: 0; padding: 34px 20px 34px 0; } }

/* sections */
.section { padding: clamp(64px, 10vw, 120px) 0; }
.section.alt { background: var(--bg2); border-block: 1px solid var(--line); }
.grid4, .grid3, .grid2 { display: grid; gap: 16px; margin-top: 44px; }
@media (min-width: 700px) { .grid4 { grid-template-columns: repeat(2, 1fr); } .grid3 { grid-template-columns: repeat(2, 1fr); } .grid2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .grid4 { grid-template-columns: repeat(4, 1fr); } .grid3 { grid-template-columns: repeat(3, 1fr); } }

[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

.pcard, .scard { position: relative; background: var(--panel); border: 1px solid var(--line); padding: 26px 22px; overflow: hidden; transition: border-color .25s, transform .25s; }
.pcard::before, .scard::before { content: ""; position: absolute; left: 0; top: 0; width: 4px; height: 100%; background: var(--ac); transform: scaleY(0); transform-origin: top; transition: transform .35s; }
.pcard:hover, .scard:hover { border-color: #3a4552; transform: translateY(-3px); }
.pcard:hover::before, .scard:hover::before { transform: scaleY(1); }
.pcard .idx { display: block; font: 800 54px var(--head); color: #232b35; line-height: 1; margin-bottom: 14px; }
.pcard p, .scard p { color: var(--mut); margin: 14px 0 0; font-size: 15px; }
.scard h3 { font-size: 28px; }
.scard p { color: #cfd6de; font-family: var(--mono); font-size: 13px; line-height: 1.55; }

/* teasers */
.tcard { display: block; color: inherit; text-decoration: none; background: var(--panel); border: 1px solid var(--line); padding: 0 0 22px; transition: border-color .25s, transform .25s; }
.tcard:hover { border-color: var(--ac); transform: translateY(-3px); }
.tcard h3, .tcard p, .tcard .more { margin-inline: 22px; }
.tcard h3 { margin-top: 20px; }
.tcard p { color: var(--mut); margin-top: 10px; }
.tcard .more { display: inline-block; margin-top: 14px; color: var(--ac); font-weight: 700; }
.tcard .more::after { content: " \2192"; }
.tview { height: 260px; background: radial-gradient(ellipse at 50% 40%, #202a35, #0e1217 75%); border-bottom: 1px solid var(--line); }

.certs { list-style: none; padding: 0; margin: 40px 0 0; display: flex; flex-wrap: wrap; gap: 12px; }
.certs li { border: 1px solid var(--ac); color: var(--ac); padding: 14px 22px; font: 700 22px var(--head); letter-spacing: .08em; }

.contact { display: grid; gap: 30px; align-items: center; border: 1px solid var(--ac); padding: clamp(26px, 5vw, 56px); background: linear-gradient(135deg, #1a1608, #111419 60%); }
.contact-act { display: grid; gap: 12px; justify-items: start; }
@media (min-width: 900px) { .contact { grid-template-columns: 1.3fr 1fr; } }

.foot { border-top: 1px solid var(--line); padding: 26px 0; color: var(--mut); font-size: 14px; }
.foot-in { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }

/* configurator page */
.cfg-head { padding: 28px 0 8px; }
.cfg-head h1 { font-size: clamp(40px, 8vw, 72px); }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tabs button { background: transparent; color: var(--mut); border: 1px solid var(--line); padding: 0 18px; min-height: 46px; font: 700 15px var(--body); cursor: pointer; border-radius: 3px; }
.tabs button[aria-selected="true"] { background: var(--ac); color: #000; border-color: var(--ac); }
.demo-note { margin: 12px 0 0; color: var(--mut); font-size: 14px; }
.cfg { display: grid; gap: 18px; padding: 16px 0 70px; align-items: start; }
.viewer-col { position: sticky; top: 61px; z-index: 10; margin-inline: -16px; }
.viewer-box { position: relative; background: radial-gradient(ellipse at 50% 35%, #1d2733, #0c1015 75%); border-block: 1px solid var(--line); }
.viewer { height: 40svh; min-height: 250px; }
.view-btns { position: absolute; left: 10px; top: 10px; display: flex; gap: 6px; }
.chip { background: rgba(11, 13, 16, .75); color: var(--tx); border: 1px solid #3a4552; border-radius: 99px; padding: 0 14px; min-height: 36px; font: 600 13px var(--body); cursor: pointer; }
.chip:hover { border-color: var(--ac); color: var(--ac); }
.fit-state { position: absolute; right: 10px; bottom: 8px; margin: 0; font-size: 13px; color: var(--ok); background: rgba(11, 13, 16, .7); padding: 2px 10px; border-radius: 99px; }
.fit-state.warn, .note.warn { color: var(--bad); }
.side { display: grid; gap: 18px; min-width: 0; }
.panel, .output { background: var(--panel); border: 1px solid var(--line); padding: 18px; min-width: 0; }
.block + .block { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.panel h2, .output h2 { font-size: 26px; margin: 0 0 14px; }
.output h2:not(:first-child) { margin-top: 26px; }
.ctl { margin-bottom: 14px; }
.ctl label { display: block; font-size: 13px; color: var(--mut); margin-bottom: 6px; font-weight: 500; }
.unit { font-family: var(--mono); font-size: 12px; }
.ctl-row { display: grid; grid-template-columns: 1fr 96px; gap: 12px; align-items: center; }
input[type="range"] { width: 100%; accent-color: var(--ac); height: 32px; min-width: 0; }
input[type="number"], select { width: 100%; min-height: 44px; background: var(--bg); color: var(--tx); border: 1px solid #38424e; border-radius: 3px; padding: 0 10px; font: 15px var(--mono); min-width: 0; }
.swatches { display: flex; flex-wrap: wrap; gap: 10px; }
.swatch { width: 44px; height: 44px; border-radius: 50%; border: 3px solid transparent; outline: 1px solid #38424e; cursor: pointer; }
.swatch[aria-pressed="true"] { border-color: var(--bg); outline: 3px solid var(--ac); }
.adders { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.adders .btn { min-height: 44px; padding: 0 14px; font-size: 14px; }
.note { font-size: 13px; color: var(--mut); margin: 0 0 14px; }
.cards { display: grid; gap: 12px; }
.card { background: var(--bg); border: 1px solid var(--line); padding: 14px; }
.card.is-bad { border-color: var(--bad); }
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; gap: 10px; }
.btn-x { min-width: 44px; padding: 0; font-size: 22px; background: transparent; color: var(--mut); border-color: #38424e; }
.btn-x:hover { color: var(--bad); border-color: var(--bad); }
.summary { display: grid; gap: 10px; margin: 0; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.summary > div { background: var(--bg); border: 1px solid var(--line); padding: 12px 14px; }
.summary dt { color: var(--mut); font-size: 12px; }
.summary dd { margin: 4px 0 0; font: 700 22px var(--head); color: var(--ac); }
.table-wrap { overflow-x: auto; }
.list { width: 100%; border-collapse: collapse; font-size: 14px; }
.list th { text-align: left; color: var(--mut); font-weight: 500; padding: 8px 10px 8px 0; border-bottom: 1px solid var(--line); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.list td { padding: 9px 10px 9px 0; border-bottom: 1px solid #1c232b; font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.json { background: var(--bg); border: 1px solid var(--line); padding: 14px; margin: 0; max-height: 260px; overflow: auto; font: 12px/1.5 var(--mono); color: #cfd6de; }
.out-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }
.copied { color: var(--ok); font-size: 14px; }
@media (min-width: 980px) {
  .cfg { grid-template-columns: minmax(0, 1.25fr) minmax(360px, 1fr); }
  .viewer-col { top: 76px; margin-inline: 0; }
  .viewer-box { border: 1px solid var(--line); }
  .viewer { height: min(72svh, 680px); }
}