:root {
  --bg: #0a1628;
  --bg-2: #0f2038;
  --bg-3: #16294a;
  --accent: #22d3ee;
  --accent-deep: #06b6d4;
  --ink: #eef3fb;
  --muted: #a3b1c6;
  --line: #22385c;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0,0,0,.4);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.02em; }
.wrap { width: min(1120px, 100% - 2.5rem); margin-inline: auto; }
.narrow { max-width: 720px; }
.center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(10,22,40,.88); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .8rem 0; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 800; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand-name { white-space: nowrap; }
.brand-name span { color: var(--accent); }
.brand.small { font-size: 1rem; }
.nav { display: flex; gap: 1.2rem; align-items: center; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 600; font-size: .95rem; }
.nav a:hover { color: var(--accent); }
.nav a.nav-cta { white-space: nowrap; background: var(--accent); color: #04121f; padding: .45rem 1rem; border-radius: 999px; }
@media (max-width: 560px) { .nav a:not(.nav-cta) { display: none; } }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 5.5rem 0 5rem;
  background:
    radial-gradient(circle at 85% 10%, rgba(34,211,238,.20), transparent 45%),
    radial-gradient(circle at 5% 95%, rgba(99,102,241,.16), transparent 42%),
    linear-gradient(165deg, #0f2240 0%, var(--bg) 75%); }
.grid-bg { position: absolute; inset: 0; pointer-events: none; opacity: .08;
  background-image: linear-gradient(var(--accent) 1px, transparent 1px), linear-gradient(90deg, var(--accent) 1px, transparent 1px);
  background-size: 48px 48px; mask-image: radial-gradient(circle at 70% 30%, #000 0%, transparent 70%); -webkit-mask-image: radial-gradient(circle at 70% 30%, #000 0%, transparent 70%); }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .16em; font-size: .78rem; font-weight: 700; color: var(--accent); margin: 0 0 .8rem; }
.hero h1 { font-weight: 800; font-size: clamp(2.4rem, 5.6vw, 4rem); margin-bottom: .35em; }
.hero h1 span { background: linear-gradient(90deg, var(--accent), #818cf8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 52ch; margin: 0 0 1rem; }
.byline { margin: 0 0 1.4rem; color: var(--ink); }
.hero-points { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.hero-points li { border: 1px solid var(--line); background: rgba(15,32,56,.6); border-radius: 999px; padding: .3rem .85rem; font-size: .88rem; font-weight: 600; }
.hero-points li::before { content: "✓ "; color: var(--accent); }
@media (max-width: 860px) { .hero-inner { grid-template-columns: 1fr; gap: 2.2rem; } .hero { padding: 3.2rem 0; } }

/* Signup */
.signup-card { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); border-top: 4px solid var(--accent); }
.signup-card h2 { font-size: 1.5rem; }
.signup-card p { color: var(--muted); margin: 0 0 1.1rem; }
.signup-card p.fine { font-size: .85rem; margin: .4rem 0 0; }
.field-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.field-row input[type="email"] { flex: 1 1 210px; min-width: 0; font: inherit; color: var(--ink); background: var(--bg); padding: .9rem 1rem; border: 1.5px solid var(--line); border-radius: 12px; }
.field-row input[type="email"]::placeholder { color: #6b7d97; }
.field-row input[type="email"]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,.25); }
button, .button { font: inherit; font-weight: 700; cursor: pointer; border: 0; border-radius: 12px; padding: .9rem 1.35rem; background: var(--accent); color: #04121f; text-decoration: none; display: inline-block; transition: background .15s, transform .15s, box-shadow .15s; }
button:hover, .button:hover { background: var(--accent-deep); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(34,211,238,.28); }
button:disabled { opacity: .6; cursor: wait; transform: none; }
.form-status { min-height: 1.5em; margin: .8rem 0 0 !important; font-weight: 600; }
.form-status.success { color: #4ade80; }
.form-status.error { color: #f87171; }

/* Sections */
.section { padding: 4.5rem 0; }
.section.alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.section p { color: var(--muted); font-size: 1.06rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; margin: 1.8rem 0 0; }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card h3 { font-size: 1.18rem; }
.card p { font-size: 1rem; margin: 0; }
.num { font-weight: 800; font-size: .9rem; color: var(--accent); letter-spacing: .1em; margin-bottom: .8rem; }

/* Footer */
.site-footer { background: #060f1c; color: var(--muted); padding: 2rem 0; font-size: .92rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .5rem 2rem; }
.footer-inner p { margin: 0; }

/* Simple pages */
.simple { min-height: 100vh; display: grid; place-items: center; text-align: center; padding: 2rem; background: radial-gradient(circle at 70% 20%, rgba(34,211,238,.16), transparent 45%), var(--bg); }
.simple .box { background: var(--bg-2); border-radius: var(--radius); padding: 2.5rem 2rem; max-width: 460px; box-shadow: var(--shadow); border-top: 4px solid var(--accent); }
.simple .box img { margin: 0 auto 1rem; }
.simple .box p { color: var(--muted); }