:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --text: #102033;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --line: #dbe5f3;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
  --radius: 24px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
a { color: inherit; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.narrow { max-width: 860px; }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(246, 248, 251, 0.88); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(219, 229, 243, 0.85); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; letter-spacing: -0.03em; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 13px; color: white; background: linear-gradient(135deg, #2563eb, #7c3aed); box-shadow: 0 12px 28px rgba(37, 99, 235, 0.28); }
.nav-links { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.nav-links a { padding: 10px 12px; border-radius: 999px; color: var(--muted); font-size: 14px; font-weight: 600; text-decoration: none; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: #eaf1ff; }
.nav-toggle { display: none; border: 0; border-radius: 12px; padding: 8px 12px; background: var(--surface); font-size: 22px; }
.hero, .page-hero { padding: 82px 0 64px; background: radial-gradient(circle at 15% 10%, #dbeafe, transparent 36%), radial-gradient(circle at 88% 4%, #ede9fe, transparent 34%); }
.hero-grid, .split, .footer-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.eyebrow { color: var(--primary); font-weight: 800; text-transform: uppercase; letter-spacing: 0.12em; font-size: 12px; margin: 0 0 12px; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.04em; margin: 0; }
h1 { font-size: clamp(46px, 8vw, 88px); }
h2 { font-size: clamp(30px, 5vw, 48px); }
h3 { font-size: 22px; }
p { color: var(--muted); margin: 12px 0 0; }
.lead { font-size: clamp(18px, 2.4vw, 23px); max-width: 680px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; text-decoration: none; font-weight: 800; border: 1px solid transparent; }
.button.primary { color: white; background: var(--primary); box-shadow: 0 18px 34px rgba(37, 99, 235, 0.28); }
.button.primary:hover { background: var(--primary-dark); }
.button.secondary { color: var(--primary); background: white; border-color: var(--line); }
.button.disabled { color: #94a3b8; background: #e2e8f0; cursor: not-allowed; }
.hero-card { display: flex; justify-content: center; }
.phone-frame { width: min(330px, 100%); min-height: 610px; padding: 16px; border: 12px solid #111827; border-radius: 44px; background: #f8fafc; box-shadow: var(--shadow); }
.phone-top { width: 96px; height: 7px; border-radius: 999px; margin: 0 auto 18px; background: #111827; }
.app-screen { display: grid; gap: 16px; padding: 18px; }
.screen-header { display: flex; justify-content: space-between; margin-bottom: 12px; }
.screen-header span { width: 78px; height: 12px; border-radius: 999px; background: #c7d2fe; }
.doc-card { display: grid; gap: 8px; padding: 20px; border-radius: 20px; background: white; box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08); }
.doc-card.highlight { color: white; background: linear-gradient(135deg, #2563eb, #7c3aed); }
.doc-card small { color: inherit; opacity: 0.75; }
.section { padding: 76px 0; }
.section.soft { background: var(--surface-soft); }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.cards { display: grid; gap: 22px; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.card, .server-panel, .contact-box, .notice { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 16px 42px rgba(15, 23, 42, 0.06); }
.icon { display: inline-grid; place-items: center; width: 48px; height: 48px; margin-bottom: 18px; border-radius: 16px; background: #eff6ff; font-size: 24px; }
.screenshots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.screenshots img, .screenshot-mock { width: 100%; aspect-ratio: 9 / 16; border-radius: 30px; object-fit: cover; background: white; box-shadow: var(--shadow); }
.screenshot-mock { padding: 26px; display: grid; align-content: start; gap: 14px; border: 1px solid var(--line); }
.screenshot-mock span { font-weight: 800; }
.screenshot-mock div { height: 48px; border-radius: 16px; background: linear-gradient(90deg, #dbeafe, #ede9fe); }
.screenshot-mock small { margin-top: auto; color: var(--muted); }
.server-panel { display: grid; gap: 14px; }
.server-panel div { display: grid; gap: 3px; padding: 16px; border-radius: 16px; background: #f8fafc; }
.server-panel span { color: var(--muted); }
.doc { padding: 46px 0 82px; }
.doc h2 { margin-top: 34px; font-size: clamp(24px, 4vw, 34px); }
.doc h2:first-child { margin-top: 0; }
.doc a { color: var(--primary); font-weight: 700; }
.doc li { margin-top: 10px; color: var(--muted); }
details { margin-top: 14px; padding: 18px; border: 1px solid var(--line); border-radius: 18px; background: white; }
summary { cursor: pointer; font-weight: 800; }
.notice { margin-top: 26px; display: grid; gap: 8px; border-color: #fde68a; background: #fffbeb; }
.site-footer { padding: 50px 0 24px; background: #0f172a; color: white; }
.site-footer p, .site-footer a, .footer-bottom { color: #cbd5e1; }
.site-footer a { text-decoration: none; }
.site-footer ul { list-style: none; padding: 0; margin: 12px 0 0; }
.site-footer li { margin: 8px 0; }
.footer-grid { align-items: start; grid-template-columns: 1.2fr 1fr 1fr; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 34px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.12); font-size: 14px; }
@media (max-width: 900px) { .hero-grid, .split, .footer-grid, .cards.three, .screenshots { grid-template-columns: 1fr; } .nav-links { display: none; position: absolute; left: 20px; right: 20px; top: 68px; padding: 14px; border: 1px solid var(--line); border-radius: 20px; background: white; box-shadow: var(--shadow); } .nav-links.open { display: grid; } .nav-toggle { display: inline-block; } .phone-frame { min-height: 500px; } }
@media (max-width: 560px) { .container { width: min(100% - 28px, 1120px); } .hero, .page-hero, .section { padding: 52px 0; } .hero-actions, .footer-bottom { flex-direction: column; align-items: stretch; } .button { width: 100%; } .card, .server-panel, .contact-box, .notice { padding: 20px; } }