/* LumaTrace marketing site. Brand: neon gradient on dark charcoal glass.
   Tokens mirror design/tokens.md. No external fonts or libraries. */

:root {
  --bg: #0C0C10;
  --surface: rgba(23, 23, 28, 0.72);
  --raised: #202028;
  --hairline: rgba(255, 255, 255, 0.10);
  --edge: rgba(111, 168, 255, 0.28);
  --text: rgba(255, 255, 255, 0.95);
  --text-2: rgba(255, 255, 255, 0.62);
  --text-3: rgba(255, 255, 255, 0.40);
  --blue: #4A6CF7;
  --magenta: #C02BD3;
  --ember: #FF7A1A;
  --grad: linear-gradient(120deg, #4A6CF7 0%, #C02BD3 52%, #FF7A1A 100%);
  --maxw: 1120px;
  --radius: 22px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Ambient brand glows, fixed behind everything. */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60vw 50vh at 12% -8%, rgba(74, 108, 247, 0.22), transparent 60%),
    radial-gradient(55vw 45vh at 92% 4%, rgba(192, 43, 211, 0.20), transparent 62%),
    radial-gradient(70vw 60vh at 70% 108%, rgba(255, 122, 26, 0.12), transparent 60%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.02rem; font-weight: 600;
  padding: 15px 26px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn-primary {
  color: #fff; background: var(--grad);
  box-shadow: 0 10px 34px rgba(192, 43, 211, 0.34);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 44px rgba(192, 43, 211, 0.46); }
.btn-ghost {
  color: var(--text); background: rgba(255,255,255,0.04);
  border-color: var(--hairline); backdrop-filter: blur(12px);
}
.btn-ghost:hover { background: rgba(255,255,255,0.09); transform: translateY(-2px); }

/* ---------- Nav ---------- */
header.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(12, 12, 16, 0.55);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; font-size: 1.18rem; letter-spacing: -0.01em; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--text-2); font-size: 0.98rem; transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { padding: 10px 20px; font-size: 0.95rem; }
@media (max-width: 760px) { .nav-links a:not(.nav-cta) { display: none; } }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 92px 0 40px; }
.eyebrow {
  display: inline-block; font-size: 0.86rem; font-weight: 600; letter-spacing: 0.02em;
  color: var(--text-2); padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--hairline); background: rgba(255,255,255,0.03); margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem); line-height: 1.04;
  font-weight: 700; letter-spacing: -0.03em; margin-bottom: 22px;
}
.hero p.sub {
  font-size: clamp(1.1rem, 2.2vw, 1.42rem); color: var(--text-2);
  max-width: 640px; margin: 0 auto 34px;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 0.9rem; color: var(--text-3); }

/* Framed hero screenshot */
.shot-frame {
  margin: 56px auto 0; max-width: 1000px; border-radius: 26px; overflow: hidden;
  border: 1px solid var(--hairline);
  box-shadow: 0 40px 120px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.02);
  position: relative;
}
.shot-frame::after {
  content: ""; position: absolute; inset: 0; border-radius: 26px; pointer-events: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
}

/* ---------- Section scaffolding ---------- */
section.block { padding: 84px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-head .kicker { font-size: 0.9rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px; }
.section-head h2 { font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; }
.section-head p { color: var(--text-2); font-size: 1.12rem; margin-top: 16px; }

/* ---------- How it works ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.step {
  background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--radius);
  overflow: hidden; backdrop-filter: blur(14px);
  transition: transform .2s ease, border-color .2s ease;
}
.step:hover { transform: translateY(-4px); border-color: var(--edge); }
.step .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  color: #fff; background: var(--grad); margin: 22px 0 0 22px;
}
.step .txt { padding: 14px 24px 8px; }
.step h3 { font-size: 1.32rem; font-weight: 650; margin-bottom: 8px; letter-spacing: -0.01em; }
.step p { color: var(--text-2); font-size: 1rem; }
.step img { margin-top: 12px; border-top: 1px solid var(--hairline); }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* ---------- Features ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat {
  background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 30px 26px; backdrop-filter: blur(14px);
  transition: transform .2s ease, border-color .2s ease;
}
.feat:hover { transform: translateY(-4px); border-color: var(--edge); }
.feat .ico {
  width: 50px; height: 50px; border-radius: 14px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
  background: rgba(255,255,255,0.05); border: 1px solid var(--hairline);
}
.feat h3 { font-size: 1.22rem; font-weight: 650; margin-bottom: 8px; letter-spacing: -0.01em; }
.feat p { color: var(--text-2); font-size: 0.99rem; }
@media (max-width: 860px) { .features { grid-template-columns: 1fr; } }

/* ---------- Gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.gallery figure {
  border-radius: 18px; overflow: hidden; border: 1px solid var(--hairline);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
}
@media (max-width: 760px) { .gallery { grid-template-columns: 1fr; } }

/* ---------- Audiences ---------- */
.who { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.who .card {
  background: var(--surface); border: 1px solid var(--hairline); border-radius: 18px;
  padding: 26px 22px; backdrop-filter: blur(14px);
}
.who .card .ico { font-size: 1.7rem; margin-bottom: 12px; }
.who .card h4 { font-size: 1.08rem; font-weight: 650; margin-bottom: 6px; }
.who .card p { color: var(--text-2); font-size: 0.94rem; }
@media (max-width: 960px) { .who { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .who { grid-template-columns: 1fr; } }

/* ---------- Trial band ---------- */
.band {
  text-align: center; border: 1px solid var(--hairline); border-radius: 28px;
  padding: 64px 32px; position: relative; overflow: hidden;
  background:
    radial-gradient(70% 120% at 50% 0%, rgba(192,43,211,0.18), transparent 60%),
    var(--surface);
  backdrop-filter: blur(14px);
}
.band h2 { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 16px; }
.band p { color: var(--text-2); font-size: 1.12rem; max-width: 560px; margin: 0 auto 30px; }
.band .tiers { display: flex; gap: 26px; justify-content: center; flex-wrap: wrap; margin-top: 26px; color: var(--text-2); font-size: 0.98rem; }
.band .tiers b { color: var(--text); }

/* ---------- Footer ---------- */
footer.site {
  border-top: 1px solid var(--hairline); padding: 48px 0 60px; margin-top: 40px;
  color: var(--text-3); font-size: 0.94rem;
}
.foot-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.foot-links { display: flex; gap: 26px; }
.foot-links a { color: var(--text-2); }
.foot-links a:hover { color: var(--text); }

/* ---------- Legal pages ---------- */
.legal { padding: 60px 0 40px; max-width: 780px; }
.legal h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 10px; }
.legal .updated { color: var(--text-3); margin-bottom: 40px; }
.legal h2 { font-size: 1.4rem; font-weight: 650; margin: 34px 0 12px; }
.legal p, .legal li { color: var(--text-2); font-size: 1.04rem; margin-bottom: 12px; }
.legal ul { padding-left: 22px; margin-bottom: 12px; }
.legal a { color: var(--blue); }
.legal a:hover { color: var(--magenta); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }