/* SynVector landing page. Syntera Labs web standard (light theme), SynVector blue accent. */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface2: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --border-subtle: #cbd5e1;
  --green: #047857;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-tint: rgba(37, 99, 235, 0.08);
  --accent-ring: rgba(37, 99, 235, 0.35);
  --radius: 16px;
  --shadow: 0 1px 4px rgba(15, 23, 42, 0.06);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--text); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 200; }
.skip:focus { left: 16px; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.eyebrow { font-size: 12px; font-weight: 700; color: var(--accent-dark); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: 34px; line-height: 1.2; letter-spacing: -0.5px; margin: 0 0 12px; }
.section-head p { color: var(--muted); max-width: 600px; margin: 0 auto; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 100; background: rgba(248, 250, 252, 0.95); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -0.3px; }
.brand img { width: 40px; height: 40px; border-radius: 10px; }
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a.link { color: var(--muted); font-size: 14px; }
.nav-links a.link:hover { color: var(--text); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 20px; border-radius: 10px; font-weight: 700; font-size: 15px; transition: background 0.15s, border-color 0.15s, transform 0.1s, box-shadow 0.15s; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 24px rgba(37, 99, 235, 0.28); }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { background: var(--surface); color: var(--text); border: 1px solid var(--border-subtle); box-shadow: var(--shadow); }
.btn-outline:hover { border-color: var(--accent); }
.btn-lg { padding: 16px 32px; font-size: 16px; border-radius: 12px; }
.btn:active { transform: translateY(1px); }

/* Hero */
.hero { text-align: center; padding: 96px 24px 64px; max-width: 860px; margin: 0 auto; }
.badge { display: inline-block; background: var(--accent-tint); border: 1px solid var(--accent-ring); border-radius: 20px; padding: 6px 16px; font-size: 12px; font-weight: 700; color: var(--accent-dark); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 28px; }
.hero h1 { font-size: 56px; line-height: 1.1; letter-spacing: -1.2px; margin: 0 0 24px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 18px; color: var(--muted); max-width: 600px; margin: 0 auto 40px; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 13px; color: var(--muted); }

.shot { max-width: 1100px; margin: 0 auto 96px; padding: 0 24px; }
.shot img { border-radius: 14px; border: 1px solid var(--border); box-shadow: 0 24px 64px rgba(15, 23, 42, 0.18); }

/* Trust strip */
.trust { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 20px 24px; }
.trust ul { list-style: none; margin: 0; padding: 0; display: flex; justify-content: center; flex-wrap: wrap; gap: 16px 40px; }
.trust li { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }
.check { color: var(--green); font-weight: 800; }

/* Features */
.features { padding: 96px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.card h3 { font-size: 16px; margin: 16px 0 8px; }
.card p { font-size: 14px; color: var(--muted); margin: 0; }
.icon { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-tint); color: var(--accent-dark); display: grid; place-items: center; }
.icon svg { width: 22px; height: 22px; }

/* Download */
.download { background: var(--surface2); padding: 96px 0; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.plan { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.plan.highlight { border: 2px solid var(--accent); box-shadow: 0 12px 40px rgba(37, 99, 235, 0.15); }
.plan .tag { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 20px; white-space: nowrap; }
.plan h3 { font-size: 20px; margin: 0 0 4px; }
.plan .meta { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 24px; font-size: 14px; color: var(--muted); flex: 1; }
.plan li { display: flex; gap: 8px; padding: 4px 0; }
.plan .btn { width: 100%; }
.steps { margin-top: 16px; font-size: 13px; color: var(--muted); border-top: 1px solid var(--border); padding-top: 16px; }
.steps summary { cursor: pointer; font-weight: 600; color: var(--text); min-height: 24px; }
.steps ol { padding-left: 18px; margin: 10px 0 0; }

/* Privacy */
.privacy { padding: 96px 0; }
.privacy .grid { grid-template-columns: repeat(2, 1fr); max-width: 900px; margin: 0 auto; }
.privacy .card { display: flex; gap: 14px; }
.privacy .card h3 { margin: 0 0 4px; }

/* CTA */
.cta { padding: 0 24px 96px; }
.cta-box { max-width: 1000px; margin: 0 auto; text-align: center; border-radius: 24px; padding: 64px 24px; background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(29, 78, 216, 0.04)); border: 1px solid var(--accent-ring); }
.cta-box h2 { font-size: 32px; margin: 0 0 12px; letter-spacing: -0.5px; }
.cta-box p { color: var(--muted); margin: 0 0 32px; }

/* Footer */
footer { background: var(--surface); border-top: 1px solid var(--border); padding: 32px 0; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer nav a:hover { color: var(--text); }
.credit { width: 100%; font-size: 12px; margin: 0; }
.credit a { text-decoration: underline; }

@media (max-width: 900px) {
  .plans, .privacy .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 40px; }
  .nav-links a.link { display: none; }
}
@media (max-width: 480px) {
  .hero { padding-top: 64px; }
  .hero h1 { font-size: 34px; }
  .section-head h2 { font-size: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}