:root {
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --primary-soft: #e0f2fe;
  --accent: #06b6d4;
  --text: #0f172a;
  --muted: #475569;
  --bg: #f8fafc;
  --surface: #fff;
  --border: #e2e8f0;
  --radius: 18px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary-dark); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
h2 { font-size: clamp(1.6rem, 4vw, 2.2rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; color: var(--muted); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
section { padding: 72px 0; }
.lead { font-size: 1.08rem; max-width: 720px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(248, 250, 252, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.site-header nav { display: flex; gap: 20px; margin-left: auto; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.site-header nav a:hover { color: var(--primary); }
.lang { font-size: .9rem; font-weight: 600; text-decoration: none; border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; }
@media (max-width: 760px) { .site-header nav { display: none; } .lang { margin-left: auto; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--text); color: #fff; text-decoration: none;
  padding: 12px 22px; border-radius: 12px; font-weight: 600;
}
.btn:hover { background: #1e293b; }
.btn svg { width: 22px; height: 22px; }
.btn small { display: block; font-size: .7rem; font-weight: 400; opacity: .8; line-height: 1; }
.btn-sm { padding: 8px 16px; font-size: .9rem; background: var(--primary); }
.btn-sm:hover { background: var(--primary-dark); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 24px; }
.note { font-size: .88rem; color: var(--muted); }

/* Hero */
.hero { background: linear-gradient(160deg, #e0f2fe 0%, #f0f9ff 55%, var(--bg) 100%); padding: 56px 0 72px; }
.hero .wrap { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(2rem, 5.2vw, 3.3rem); }
.hero .lead { font-size: 1.15rem; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.pills li { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; font-size: .85rem; color: var(--muted); }
.hero-art { justify-self: center; }
.hero-art img { width: min(320px, 70vw); filter: drop-shadow(0 24px 40px rgba(2, 132, 199, .25)); }
@media (max-width: 760px) { .hero .wrap { grid-template-columns: 1fr; } .hero-art { order: -1; } .hero-art img { width: 200px; } }

/* Features */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 32px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card .ico { font-size: 1.6rem; display: block; margin-bottom: 8px; }
.card p { margin: 0; font-size: .95rem; }

/* Steps */
.steps { counter-reset: s; list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 32px; }
.steps li { counter-increment: s; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.steps li::before { content: counter(s); display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700; margin-bottom: 10px; }
.steps p { margin: 0; }

/* AI coach */
.ai { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.ai .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.chat { display: flex; flex-direction: column; gap: 10px; }
.bubble { max-width: 85%; padding: 10px 14px; border-radius: 16px; font-size: .95rem; margin: 0; }
.bubble.user { align-self: flex-end; background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.bubble.bot { align-self: flex-start; background: var(--primary-soft); color: var(--text); border-bottom-left-radius: 4px; }
@media (max-width: 760px) { .ai .wrap { grid-template-columns: 1fr; } }

/* Screenshots */
.shots { display: flex; gap: 16px; overflow-x: auto; padding: 8px 4px 16px; margin-top: 28px; scroll-snap-type: x mandatory; }
.shots figure { margin: 0; flex: 0 0 200px; scroll-snap-align: start; }
.shots img { border-radius: 20px; border: 1px solid var(--border); }
.shots figcaption { font-size: .85rem; color: var(--muted); text-align: center; margin-top: 8px; }

/* Knowledge */
.prose { max-width: 760px; }
.prose ul { color: var(--muted); padding-left: 20px; }
.sources { font-size: .85rem; }
.disclaimer { background: #fef3c7; border-left: 3px solid #d97706; padding: 10px 14px; border-radius: 0 10px 10px 0; color: #78350f; font-size: .92rem; }

/* FAQ */
.faq { max-width: 800px; margin: 32px auto 0; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 4px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 600; padding: 12px 0; }
.faq details p { margin: 0 0 14px; }

/* Final CTA */
.final { background: linear-gradient(135deg, var(--primary-dark), #0e7490); color: #fff; text-align: center; }
.final h2, .final p { color: #fff; }
.final .cta-row { justify-content: center; }
.final .btn { background: #fff; color: var(--text); }

/* Footer */
.site-footer { background: var(--text); color: #94a3b8; padding: 32px 0; font-size: .9rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }
.site-footer a { color: #cbd5e1; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }

a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }