:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --ink: #0f172a;
  --ink-soft: #475569;
  --line: #e2e8f0;
  --accent: #0284c7;
  --accent-ink: #ffffff;
  --dark: #0b1220;
  --dark-ink: #e2e8f0;
  --dark-soft: #94a3b8;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.6; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -.01em; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
a { color: var(--accent); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 720px; }
.center { text-align: center; }

.eyebrow { font-family: var(--mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; color: var(--accent); margin-bottom: .6em; }

.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); text-decoration: none; font-weight: 600; padding: .75em 1.3em; border-radius: 6px; border: 1px solid var(--accent); }
.btn:hover { background: #0369a1; border-color: #0369a1; }
.btn-ghost { background: transparent; color: var(--dark-ink); border-color: #334155; }
.btn-ghost:hover { background: #1e293b; border-color: #475569; }
.btn-small { padding: .45em .9em; font-size: .9rem; }

/* Header */
.site-header { background: var(--dark); color: var(--dark-ink); position: sticky; top: 0; z-index: 10; border-bottom: 1px solid #1e293b; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--dark-ink); text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a:not(.btn) { color: var(--dark-soft); text-decoration: none; font-size: .95rem; }
.nav a:not(.btn):hover { color: var(--dark-ink); }

/* Hero */
.hero { position: relative; overflow: hidden; background: var(--dark) url("media/hero-poster.jpg") center / cover no-repeat; color: #fff; min-height: 640px; display: flex; align-items: center; padding: 96px 0; }
.hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,12,22,.92) 0%, rgba(7,12,22,.78) 45%, rgba(7,12,22,.45) 100%); }
.hero-inner { position: relative; z-index: 1; width: 100%; }
.hero-copy { max-width: 680px; }
.hero h1 { text-shadow: 0 2px 12px rgba(0,0,0,.35); }
.hero .eyebrow { color: #7dd3fc; }
.lead { font-size: 1.15rem; color: #cbd5e1; max-width: 620px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero .btn-ghost { color: #fff; border-color: rgba(255,255,255,.55); }
.hero .btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
@media (prefers-reduced-motion: reduce) { .hero-video { display: none; } }

/* Strip */
.strip { background: #0f1a2e; color: var(--dark-ink); border-top: 1px solid #1e293b; }
.strip-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding-top: 22px; padding-bottom: 22px; }
.strip .v { font-weight: 600; font-size: .95rem; padding-left: 22px; position: relative; }
.strip .v::before { content: ""; position: absolute; left: 0; top: .45em; width: 10px; height: 10px; border-radius: 2px; background: #38bdf8; }

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-lead { color: var(--ink-soft); max-width: 720px; font-size: 1.05rem; }

.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 32px; }
.card { border: 1px solid var(--line); border-radius: 8px; padding: 24px; background: var(--bg); }
.card p { color: var(--ink-soft); margin: 0; }

.standards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 40px; margin-top: 32px; }
.std { border-left: 3px solid var(--accent); padding-left: 18px; }
.std p { color: var(--ink-soft); margin: 0; }

.spec { width: 100%; max-width: 820px; border-collapse: collapse; margin-top: 28px; font-size: .98rem; }
.spec th, .spec td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { font-family: var(--mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-soft); width: 180px; font-weight: 600; }

.steps { list-style: none; counter-reset: step; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.steps li { counter-increment: step; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 22px; }
.steps li::before { content: "0" counter(step); display: block; font-family: var(--mono); color: var(--accent); font-weight: 700; margin-bottom: 8px; }
.steps p { color: var(--ink-soft); margin: 0; }

.section-cta { background: var(--dark); color: var(--dark-ink); }
.section-cta p { color: var(--dark-soft); }

.reasons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px 36px; margin-top: 32px; }
.reason { border-top: 3px solid var(--accent); padding-top: 16px; }
.reason p { color: var(--ink-soft); margin: 0; }

.section-dark { background: var(--dark); color: var(--dark-ink); }
.section-dark .eyebrow { color: #38bdf8; }
.section-dark .section-lead { color: var(--dark-soft); }
.checklist { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 40px; }
.checklist li { position: relative; padding-left: 30px; color: var(--dark-ink); }
.checklist li::before { content: ""; position: absolute; left: 2px; top: .35em; width: 14px; height: 8px; border-left: 2px solid #38bdf8; border-bottom: 2px solid #38bdf8; transform: rotate(-45deg); }

.table-cta { margin-top: 28px; }

/* Footer */
.site-footer { background: #070c16; color: var(--dark-soft); font-size: .9rem; padding: 32px 0; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px; }
.site-footer strong { color: var(--dark-ink); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer a { color: var(--dark-soft); text-decoration: none; }
.site-footer a:hover { color: var(--dark-ink); }

/* Terms page */
.doc { padding: 56px 0 80px; }
.doc h1 { font-size: 2.2rem; }
.doc h2 { font-size: 1.5rem; margin-top: 1.8em; }
.doc h3 { margin-top: 1.4em; }
.doc ol, .doc ul { padding-left: 1.4em; }
.doc li { margin: .35em 0; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 2.5em 0; }

/* Responsive */
@media (max-width: 900px) {
  .hero { min-height: 560px; }
  .hero-shade { background: rgba(7,12,22,.8); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .reasons { grid-template-columns: repeat(2, 1fr); }
  .checklist { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .strip-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav a:not(.btn) { display: none; }
  .cards, .standards, .steps, .reasons { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero { padding: 64px 0; min-height: 520px; }
  .spec th { width: 120px; }
}