/* 720nm — marketing + support site
   Committed dark "false-color infrared" look. Dependency-free, self-hosted. */

:root {
  --bg-0: oklch(13% 0.03 350);
  --bg-1: oklch(17% 0.04 348);
  --surface: oklch(21% 0.035 345);
  --surface-hi: oklch(25% 0.04 345);
  --line: oklch(30% 0.03 345 / 0.6);

  --ink: oklch(96% 0.012 330);
  --muted: oklch(74% 0.02 340);
  --faint: oklch(60% 0.02 340);

  --accent: oklch(64% 0.24 6);
  --accent-2: oklch(72% 0.19 330);
  --accent-ink: oklch(20% 0.04 350);

  --text-hero: clamp(3rem, 1.2rem + 7vw, 7.5rem);
  --text-h2: clamp(1.8rem, 1.2rem + 2.4vw, 3rem);
  --text-lead: clamp(1.1rem, 1rem + 0.5vw, 1.4rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.12rem);

  --space-section: clamp(4rem, 3rem + 6vw, 9rem);
  --radius: 18px;
  --radius-sm: 12px;

  --duration: 260ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --maxw: 1120px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "SF Pro Text", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(120% 90% at 82% -10%, oklch(30% 0.11 6 / 0.55), transparent 55%),
    radial-gradient(100% 80% at 0% 0%, oklch(28% 0.09 330 / 0.4), transparent 50%),
    var(--bg-0);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.05; letter-spacing: -0.02em; font-weight: 680; margin: 0; }

a { color: inherit; }

.wrap { width: min(100% - 2.5rem, var(--maxw)); margin-inline: auto; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(14px);
  background: oklch(13% 0.03 350 / 0.7);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; padding-block: 0.9rem; }
.brand { display: inline-flex; align-items: baseline; gap: 0.15em; font-weight: 760; letter-spacing: -0.03em; font-size: 1.25rem; text-decoration: none; }
.brand b { color: var(--accent); font-weight: 760; }
.brand span { color: var(--muted); font-weight: 500; font-size: 0.72em; }
.nav__links { display: flex; gap: 1.4rem; align-items: center; }
.nav__links a { color: var(--muted); text-decoration: none; font-size: 0.96rem; transition: color var(--duration) var(--ease); }
.nav__links a:hover, .nav__links a:focus-visible { color: var(--ink); }

/* ---------- Buttons ---------- */
.btn {
  --pad-y: 0.8rem; --pad-x: 1.4rem;
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: var(--pad-y) var(--pad-x);
  border-radius: 999px; border: 1px solid transparent;
  font-weight: 620; text-decoration: none; cursor: pointer;
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease), background var(--duration) var(--ease);
}
.btn--primary {
  color: var(--accent-ink);
  background: linear-gradient(105deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px -12px oklch(64% 0.24 6 / 0.8);
}
.btn--primary:hover, .btn--primary:focus-visible { transform: translateY(-2px); box-shadow: 0 16px 40px -12px oklch(64% 0.24 6 / 0.9); }
.btn--ghost { color: var(--ink); border-color: var(--line); background: var(--surface); }
.btn--ghost:hover, .btn--ghost:focus-visible { background: var(--surface-hi); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero { padding-top: clamp(3rem, 2rem + 5vw, 6rem); padding-bottom: var(--space-section); }
.hero__tag {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.82rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.35rem 0.85rem; margin-bottom: 1.6rem;
}
.hero__tag i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px 1px var(--accent); font-style: normal; }
.hero h1 { font-size: var(--text-hero); font-weight: 720; }
.hero h1 em { font-style: normal; background: linear-gradient(100deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__lead { font-size: var(--text-lead); color: var(--muted); max-width: 34ch; margin: 1.4rem 0 2.2rem; }
.hero__cta { display: flex; gap: 0.9rem; flex-wrap: wrap; align-items: center; }
.hero__price { color: var(--faint); font-size: 0.95rem; }
.hero__price b { color: var(--ink); font-weight: 640; }

/* ---------- Features (bento) ---------- */
.section { padding-block: var(--space-section); }
.section__head { max-width: 46ch; margin-bottom: clamp(2rem, 1rem + 3vw, 3.5rem); }
.section__head h2 { font-size: var(--text-h2); }
.section__head p { color: var(--muted); font-size: var(--text-lead); margin-top: 0.9rem; }

.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; }
.card {
  background: linear-gradient(180deg, var(--surface-hi), var(--surface));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.4rem, 1rem + 1vw, 2rem);
  transition: transform var(--duration) var(--ease), border-color var(--duration) var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: oklch(64% 0.24 6 / 0.5); }
.card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.card p { color: var(--muted); margin: 0; font-size: 1rem; }
.card__k { font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 0.9rem; font-weight: 640; }
.card--wide { grid-column: span 4; }
.card--tall { grid-column: span 2; }
.card--half { grid-column: span 3; }
.card--third { grid-column: span 2; }

/* ---------- Pricing strip ---------- */
.pricing {
  border: 1px solid var(--line); border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 100% 0%, oklch(30% 0.12 6 / 0.5), transparent 60%),
    var(--surface);
  padding: clamp(2rem, 1.4rem + 3vw, 3.5rem);
  display: grid; gap: 1.6rem; align-items: center;
  grid-template-columns: 1.4fr 1fr;
}
.pricing h2 { font-size: var(--text-h2); }
.pricing ul { list-style: none; padding: 0; margin: 1.2rem 0 0; display: grid; gap: 0.6rem; }
.pricing li { color: var(--muted); padding-left: 1.6rem; position: relative; }
.pricing li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.7rem; height: 0.7rem; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.pricing__tag { text-align: center; padding: 1.6rem; border-radius: var(--radius-sm); background: var(--bg-1); border: 1px solid var(--line); }
.pricing__tag .amt { font-size: clamp(2.6rem, 2rem + 3vw, 3.6rem); font-weight: 720; letter-spacing: -0.03em; }
.pricing__tag .sub { color: var(--faint); font-size: 0.9rem; }

/* ---------- Prose (privacy / support) ---------- */
.prose { max-width: 68ch; }
.prose h1 { font-size: var(--text-h2); margin-bottom: 0.4rem; }
.prose .updated { color: var(--faint); font-size: 0.9rem; margin-bottom: 2.5rem; }
.prose h2 { font-size: 1.4rem; margin: 2.4rem 0 0.8rem; }
.prose p, .prose li { color: var(--muted); }
.prose ul { padding-left: 1.2rem; display: grid; gap: 0.4rem; }
.prose a { color: var(--accent-2); text-underline-offset: 3px; }
.prose strong { color: var(--ink); font-weight: 640; }
.callout {
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  background: var(--surface); border-radius: var(--radius-sm);
  padding: 1.1rem 1.3rem; margin: 1.6rem 0; color: var(--ink);
}

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding-block: 2.5rem; margin-top: var(--space-section); }
.footer__inner { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; align-items: center; color: var(--faint); font-size: 0.92rem; }
.footer a { color: var(--muted); text-decoration: none; transition: color var(--duration) var(--ease); }
.footer a:hover { color: var(--ink); }
.footer__links { display: flex; gap: 1.4rem; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .card--wide, .card--tall, .card--half, .card--third { grid-column: span 2; }
  .pricing { grid-template-columns: 1fr; }
  .nav__links a:not(.btn) { display: none; }
}
@media (max-width: 420px) {
  .bento { grid-template-columns: 1fr; }
  .card--wide, .card--tall, .card--half, .card--third { grid-column: span 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto; }
}