/* Design system */
:root {
  --bg: #0b1220;
  --surface: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --brand: #0ea5e9; /* sky-500 */
  --brand-600: #0284c7;
  --accent: #8b5cf6; /* violet-500 */
  --success: #22c55e;
  --radius: 14px;
  --shadow-lg: 0 20px 60px rgba(2, 132, 199, 0.25);
  --shadow-md: 0 12px 32px rgba(2, 132, 199, 0.2);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --surface: #f8fafc;
    --text: #0f172a;
    --muted: #475569;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(14,165,233,0.25), transparent),
              radial-gradient(1000px 500px at 90% 10%, rgba(139,92,246,0.18), transparent),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--surface);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 8px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: saturate(180%) blur(12px);
  background: color-mix(in oklch, var(--bg), transparent 35%);
  border-bottom: 1px solid color-mix(in oklch, var(--text), transparent 92%);
  z-index: 50;
}
.nav {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text);
  text-decoration: none;
}
.brand img {
  border-radius: 8px;
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.3);
}
.primary-nav a, .footer__nav a {
  color: var(--muted);
  text-decoration: none;
  margin: 0 0.6rem;
  font-weight: 500;
}
.primary-nav a:hover { color: var(--text); }
.cta { display: flex; gap: 0.6rem; }

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  text-decoration: none;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}
.button:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.button:active { transform: translateY(0); }
.button--ghost {
  background: transparent;
  border: 1px solid color-mix(in oklch, var(--text), transparent 80%);
  color: var(--text);
}
.button--large { padding: 1rem 1.4rem; font-size: 1.05rem; }

/* Hero */
.hero {
  padding: 72px 0 32px;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2.2rem;
}
.hero h1 {
  font-size: clamp(2rem, 3.2vw + 1rem, 3rem);
  line-height: 1.1;
  margin: 0 0 0.8rem;
}
.lead { color: var(--muted); font-size: 1.125rem; }
.hero__ctas { display: flex; gap: 1rem; align-items: center; margin: 1.2rem 0; }
.hero__bullets { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0.5rem 1rem; padding: 0; list-style: none; color: var(--muted); }

.device {
  position: relative;
  border-radius: 36px;
  padding: 10px;
  background: linear-gradient(180deg, #0b1220, #0f172a);
  box-shadow: 0 30px 80px rgba(2, 132, 199, 0.35), inset 0 0 0 1px rgba(255,255,255,0.06);
}
.device img { display: block; width: 100%; height: auto; border-radius: 26px; }

/* Sections */
.section { padding: 64px 0; }
.section--alt { background: color-mix(in oklch, var(--surface), transparent 15%); }
.section--tight { padding: 36px 0; }
.section__title {
  font-size: clamp(1.6rem, 1.5vw + 1rem, 2rem);
  margin: 0 0 0.6rem 0;
}
.section__subtitle { color: var(--muted); margin: 0 0 2rem 0; }

/* Prose (long-form content) */
.prose { color: var(--text); }
.prose p { margin: 0 0 0.9rem 0; }
.prose h3 { margin: 1.2rem 0 0.6rem; font-size: 1.1rem; }
.prose ul { margin: 0.6rem 0 1rem 1.2rem; }
.prose li { margin: 0.3rem 0; }
.prose strong { color: color-mix(in oklch, var(--text), black 6%); }

.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.feature {
  background: linear-gradient(180deg, color-mix(in oklch, var(--surface), transparent 5%), transparent);
  border: 1px solid color-mix(in oklch, var(--text), transparent 90%);
  padding: 1.1rem;
  border-radius: var(--radius);
}
.feature__icon { font-size: 1.4rem; }
.feature h3 { margin: 0.6rem 0 0.3rem; font-size: 1.1rem; }
.feature p { color: var(--muted); margin: 0; }

/* Steps */
.steps { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: center; }
.steps__list { counter-reset: step; padding-left: 0; }
.steps__list li { list-style: none; margin: 0 0 1rem 0; }
.steps__list li h3::before {
  counter-increment: step;
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 28px; height: 28px; margin-right: 0.5rem;
  background: color-mix(in oklch, var(--brand), var(--accent) 30%);
  color: white; border-radius: 999px; font-size: 0.9rem;
}
.steps__cta { margin-top: 1rem; }
.steps__media img { width: 100%; height: auto; border-radius: var(--radius); box-shadow: var(--shadow-md); }

/* Testimonials */
.testimonials { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.quote { background: var(--surface); border: 1px solid color-mix(in oklch, var(--text), transparent 90%); padding: 1rem; border-radius: var(--radius); }
.quote p { margin: 0; }
.quote footer { color: var(--muted); margin-top: 0.6rem; }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 0.8rem; }
.gallery img { width: 100%; height: auto; border-radius: 18px; box-shadow: 0 16px 40px rgba(14,165,233,0.25); }

/* CTA band */
.cta-band { padding: 56px 0; background: radial-gradient(600px 220px at 30% 0%, rgba(14,165,233,0.25), transparent), linear-gradient(180deg, color-mix(in oklch, var(--surface), transparent 5%), transparent); border-top: 1px solid color-mix(in oklch, var(--text), transparent 90%); }
.cta-band__content { text-align: center; }
.cta-band__content p { color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid color-mix(in oklch, var(--text), transparent 92%); padding: 32px 0 24px; }
.footer__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 1rem; align-items: start; }
.footer__brand .brand img { box-shadow: none; }
.footer__legal a { color: var(--muted); text-decoration: none; margin-right: 0.8rem; }
.subfooter { margin-top: 12px; color: var(--muted); }

/* Utilities */
.muted { color: var(--muted); }
.app-store img { filter: drop-shadow(0 12px 20px rgba(0,0,0,0.25)); }
.text-cta { color: var(--text); text-underline-offset: 4px; }

/* Responsive */
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}
@media (max-width: 780px) {
  .features { grid-template-columns: 1fr 1fr; }
  .testimonials, .gallery { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .primary-nav { display: none; }
}