/* Copyright (c) 2026 Seiham LLC. seiham.com — shared by every page. */
:root {
  --bg: #080f1e;
  --bg-2: #0d1a2e;
  --panel: #122038;
  --line: rgba(169, 192, 214, .14);
  --text: #e8f0f7;
  --text-2: #a9c0d6;
  --text-3: #5a7a9a;
  --teal: #00cdb8;
  --teal-2: #33d9c8;
  --teal-soft: rgba(0, 205, 184, .10);
  --sans: 'IBM Plex Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace;
  --wrap: 1120px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--teal); color: #04121a; padding: 8px 12px; border-radius: 6px; z-index: 10; }
.skip:focus { left: 8px; }

/* ── Header ─────────────────────────────────────────────────────────── */
.site-header { position: sticky; top: 0; z-index: 5; background: rgba(8, 15, 30, .86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; font-size: 1.15rem; letter-spacing: .01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; }
.nav { display: flex; gap: 26px; font-size: .92rem; margin-left: auto; margin-right: 8px; }
.nav a { color: var(--text-2); }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav .soon { color: var(--text-3); cursor: default; }

/* ── Hero ───────────────────────────────────────────────────────────── */
.hero { padding: 112px 0 96px; background:
  radial-gradient(900px 420px at 85% -10%, rgba(0, 205, 184, .16), transparent 60%),
  radial-gradient(700px 380px at -10% 110%, rgba(36, 61, 94, .55), transparent 60%); }
.eyebrow { font: 500 .78rem var(--mono); color: var(--teal); letter-spacing: .14em; text-transform: uppercase; margin: 0 0 18px; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.12; margin: 0 0 22px; max-width: 16ch; font-weight: 600; letter-spacing: -.01em; }
.hero h1 em { font-style: normal; color: var(--teal); }
.lead { font-size: 1.18rem; color: var(--text-2); max-width: 60ch; margin: 0 0 34px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { white-space: nowrap; display: inline-block; padding: 12px 22px; border-radius: 8px; font-weight: 600; font-size: .95rem; border: 1px solid transparent; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--teal); color: #04121a; }
.btn-primary:hover { background: var(--teal-2); }

.btn-sm { padding: 8px 16px; font-size: .88rem; }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--teal); }

/* ── Sections ───────────────────────────────────────────────────────── */
section { padding: 88px 0; }
section.alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); line-height: 1.2; margin: 0 0 12px; font-weight: 600; }
.section-head p { color: var(--text-2); margin: 0; font-size: 1.05rem; }

/* Product */
.product { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start;
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 40px; }
.product-title { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.product-title img { width: 52px; height: 52px; }
.product-title h3 { margin: 0; font-size: 1.6rem; font-weight: 600; }
.pill { display: inline-block; font: 500 .7rem var(--mono); letter-spacing: .1em; text-transform: uppercase;
  color: var(--teal); background: var(--teal-soft); border: 1px solid rgba(0, 205, 184, .3); padding: 3px 9px; border-radius: 999px; }
.product p { color: var(--text-2); margin: 0 0 16px; }
.features { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.features li { padding: 12px 14px 12px 40px; position: relative; background: rgba(8, 15, 30, .5); border: 1px solid var(--line); border-radius: 10px; font-size: .95rem; }
.features li::before { content: ""; position: absolute; left: 15px; top: 19px; width: 12px; height: 7px;
  border-left: 2px solid var(--teal); border-bottom: 2px solid var(--teal); transform: rotate(-45deg); }
.features strong { color: var(--text); font-weight: 600; }
.features span { color: var(--text-2); }

/* Principles */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
.card .num { font: 500 .78rem var(--mono); color: var(--teal); margin-bottom: 12px; }
.card h3 { margin: 0 0 10px; font-size: 1.15rem; font-weight: 600; }
.card p { margin: 0; color: var(--text-2); font-size: .96rem; }

/* About */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.about p { color: var(--text-2); margin: 0 0 16px; }
.facts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.facts li { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: .95rem; }
.facts li span:first-child { color: var(--text-3); font: 500 .78rem var(--mono); letter-spacing: .08em; text-transform: uppercase; padding-top: 3px; }
.facts li span:last-child { text-align: right; }

/* Contact */
.contact { text-align: center; }
.contact .section-head { margin: 0 auto 28px; }
.contact .actions { justify-content: center; }

/* ── Footer ─────────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; color: var(--text-3); font-size: .85rem; }
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.site-footer a { color: var(--text-2); }

/* ── Simple pages (404, future product / pricing pages) ─────────────── */
.page { padding: 120px 0; min-height: 60vh; }
.page h1 { font-size: 2.2rem; margin: 0 0 14px; font-weight: 600; }
.page p { color: var(--text-2); max-width: 60ch; }

/* ── Small screens ──────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .product, .about { grid-template-columns: 1fr; }
  .product { padding: 28px; }
  .grid-3 { grid-template-columns: 1fr; }
  .nav { gap: 16px; }
  .nav .hide-sm { display: none; }
  .hero { padding: 80px 0 72px; }
  section { padding: 64px 0; }
}
@media (max-width: 480px) {
  .wrap { padding: 0 16px; }
  .nav { font-size: .85rem; gap: 12px; }
  .nav a[href$="#about"] { display: none; }
  .facts li { flex-direction: column; gap: 4px; }
  .facts li span:last-child { text-align: left; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }