/* Quantcelerator presentation site. No external requests: system fonts, local assets only. */
:root {
  --ink: #070b14;
  --bg: #0b1220;
  --bg2: #0f1a30;
  --panel: #121d33;
  --line: #243451;
  --text: #e9eef5;
  --muted: #b7c3d3;
  --dim: #7f8ea3;
  --blue: #5aa9ff;
  --gold: #e8b45a;
  --green: #4ade9a;
  --max: 1180px;
  --font: "Inter", "Segoe UI", "Helvetica Neue", Roboto, Arial, system-ui, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 17px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: clamp(38px, 5.4vw, 68px); font-weight: 700; }
h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 700; }
h3 { font-size: 20px; font-weight: 650; }
p { margin: 0; }
.wrap { width: min(var(--max), 100% - 32px); margin: 0 auto; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.dim { color: var(--dim); }
.kicker { font-family: var(--mono); font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--blue); font-weight: 600; }
.gold { color: var(--gold); }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 20; background: rgba(11, 18, 32, 0.86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.topbar .wrap { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: 0.02em; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav { display: flex; gap: 18px; margin-left: auto; font-size: 14px; color: var(--muted); }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav .cta { color: var(--ink); background: var(--gold); padding: 7px 13px; border-radius: 8px; font-weight: 650; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 6px 10px; font: inherit; }

/* hero */
.hero { position: relative; overflow: hidden; padding: 84px 0 56px; background: radial-gradient(900px 500px at 20% -10%, rgba(90, 169, 255, 0.18), transparent 60%), radial-gradient(700px 400px at 90% 10%, rgba(232, 180, 90, 0.12), transparent 60%), var(--bg); }
.hero .grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.hero .status { display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line); padding: 7px 12px; border-radius: 999px; margin-bottom: 22px; }
.hero .status i { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }
.hero p.lead { font-size: 20px; color: var(--muted); margin-top: 20px; max-width: 560px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px; font-weight: 650; font-size: 16px; border: 1px solid transparent; cursor: pointer; }
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn.primary { background: var(--gold); color: var(--ink); }
.btn.ghost { border-color: var(--line); color: var(--text); background: rgba(255, 255, 255, 0.03); }
.hero .shot { border-radius: 14px; border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.04); overflow: hidden; transform: perspective(1400px) rotateY(-6deg) rotateX(2deg); }
.hero .shot img { width: 100%; }
.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 56px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px 18px 16px; }
.stat b { display: block; font-size: 30px; font-weight: 700; letter-spacing: -0.02em; font-family: var(--mono); color: var(--text); }
.stat span { display: block; color: var(--muted); font-size: 14px; margin-top: 4px; line-height: 1.35; }

/* sections */
section { padding: 72px 0; border-top: 1px solid var(--line); }
section.alt { background: var(--bg2); }
.head { max-width: 760px; margin-bottom: 36px; }
.head h2 { margin-top: 10px; }
.head p { color: var(--muted); font-size: 18px; margin-top: 14px; }
.cols { display: grid; gap: 20px; }
.cols.three { grid-template-columns: repeat(3, 1fr); }
.cols.two { grid-template-columns: repeat(2, 1fr); }
.cols.four { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card h3 { margin-bottom: 10px; }
.card p, .card li { color: var(--muted); font-size: 15.5px; }
.card ul { margin: 10px 0 0; padding-left: 18px; }
.card li { margin: 4px 0; }
.card .tag { display: inline-block; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); margin-bottom: 10px; }
.card.premium { border-color: rgba(232, 180, 90, 0.45); box-shadow: 0 0 40px rgba(232, 180, 90, 0.08) inset; }

/* feature rows with a screen */
.feature { display: grid; grid-template-columns: 1fr 1.25fr; gap: 40px; align-items: center; padding: 34px 0; }
.feature.flip { grid-template-columns: 1.25fr 1fr; }
.feature.flip .text { order: 2; }
.feature .text h3 { font-size: 26px; margin-bottom: 12px; }
.feature .text p { color: var(--muted); }
.feature .text ul { color: var(--muted); padding-left: 18px; margin: 12px 0 0; }
.feature .text li { margin: 5px 0; }
.shot { border-radius: 12px; border: 1px solid var(--line); overflow: hidden; background: #000; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45); }
.shot img { width: 100%; cursor: zoom-in; }
.shot figcaption { font-size: 13px; color: var(--dim); padding: 8px 12px; border-top: 1px solid var(--line); background: var(--panel); }

/* tables */
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--dim); font-weight: 600; font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.1em; text-transform: uppercase; }
td.num, th.num { text-align: right; font-family: var(--mono); white-space: nowrap; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.table-wrap table th, .table-wrap table td { padding: 11px 16px; }
.note { font-size: 14px; color: var(--dim); margin-top: 12px; }

/* numbers band */
.band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.band .n { background: linear-gradient(180deg, rgba(90, 169, 255, 0.08), transparent), var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 22px; }
.band .n b { font-family: var(--mono); font-size: 34px; display: block; letter-spacing: -0.02em; }
.band .n span { color: var(--muted); font-size: 14.5px; display: block; margin-top: 6px; }
.band .n small { color: var(--dim); font-size: 12.5px; display: block; margin-top: 10px; }

/* gallery / skins */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery figure { margin: 0; }
.skins { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; align-items: start; }
.skin-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.skin-list button { text-align: left; background: var(--panel); border: 1px solid var(--line); color: var(--text); border-radius: 10px; padding: 10px 12px; font: inherit; font-size: 14.5px; cursor: pointer; }
.skin-list button.active { border-color: var(--gold); color: var(--gold); }

/* film */
.film video { width: 100%; border-radius: 14px; border: 1px solid var(--line); background: #000; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55); }
.chapters { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; margin-top: 16px; }
.chapters div { font-size: 13px; color: var(--muted); background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.chapters b { display: block; color: var(--gold); font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; margin-bottom: 4px; }

/* lists */
.checks { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; }
.checks li { position: relative; padding-left: 26px; color: var(--muted); font-size: 15.5px; }
.checks li::before { content: ""; position: absolute; left: 0; top: 9px; width: 14px; height: 7px; border-left: 2px solid var(--green); border-bottom: 2px solid var(--green); transform: rotate(-45deg); }
.cross { list-style: none; padding: 0; margin: 0; }
.cross li { position: relative; padding-left: 26px; color: var(--muted); font-size: 15.5px; margin: 6px 0; }
.cross li::before { content: "—"; position: absolute; left: 0; color: var(--dim); }

/* contact / footer */
.contact { text-align: center; padding: 80px 0; background: radial-gradient(700px 300px at 50% 0%, rgba(232, 180, 90, 0.14), transparent 70%), var(--bg2); }
.contact p { color: var(--muted); max-width: 640px; margin: 14px auto 0; font-size: 18px; }
footer { padding: 36px 0 48px; border-top: 1px solid var(--line); color: var(--dim); font-size: 13.5px; }
footer .wrap { display: grid; grid-template-columns: 1fr auto; gap: 24px; }
footer p { margin: 4px 0; }
footer a { color: var(--muted); }

/* lightbox */
.lightbox { position: fixed; inset: 0; background: rgba(3, 6, 12, 0.92); display: none; align-items: center; justify-content: center; z-index: 50; padding: 24px; cursor: zoom-out; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 10px; border: 1px solid var(--line); }

@media (max-width: 980px) {
  .hero .grid, .feature, .feature.flip { grid-template-columns: 1fr; }
  .feature.flip .text { order: 0; }
  .hero .shot { transform: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cols.three, .cols.four, .band, .gallery { grid-template-columns: repeat(2, 1fr); }
  .chapters { grid-template-columns: repeat(3, 1fr); }
  .skins { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 48px 0 40px; }
  .stats, .cols.two, .cols.three, .cols.four, .band, .gallery, .checks, .skin-list { grid-template-columns: 1fr; }
  .chapters { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; position: absolute; top: 60px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 10px 0; }
  .menu-btn { display: block; }
  footer .wrap { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
}