:root {
  --bg: #060b16;
  --bg-soft: #0d1529;
  --text: #eef3ff;
  --muted: #b5bfd8;
  --primary: #1f7ae0;
  --primary-strong: #165fb0;
  --border: #25314d;
  --card: #111b33;
  --accent: #00b8d9;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }

.container { width: min(1120px, 92%); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 16, 32, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.2rem; color: #fff; }
.brand-logo {
  width: 34px;
  height: 34px;
  object-fit: contain;
  border-radius: 8px;
}
.menu { display: flex; gap: 20px; color: var(--muted); }
.menu a:hover { color: #fff; }
.menu-toggle { display: none; background: transparent; border: 1px solid var(--border); color: #fff; padding: 8px 12px; border-radius: 8px; }
.controls { display: flex; align-items: center; gap: 10px; }
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-btn {
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 8px 10px;
  font-weight: 700;
  cursor: pointer;
}
.lang-btn.active {
  background: var(--primary);
  color: #fff;
}

.hero { padding: 76px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 24px; align-items: start; }
.tag { display: inline-block; margin: 0 0 14px; color: #8fb3ff; font-weight: 700; letter-spacing: 0.4px; }
h1 { margin: 0 0 16px; font-size: clamp(1.8rem, 3.4vw, 3rem); line-height: 1.2; }
.lead { margin: 0; color: var(--muted); line-height: 1.7; }

.hero-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 16px; border-radius: 10px; font-weight: 700; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-strong); }
.btn.ghost { border: 1px solid var(--border); color: var(--text); }

.hero-card {
  background: linear-gradient(180deg, #182447 0%, #141d37 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}
.hero-card h3 { margin-top: 0; }
.hero-card ul { margin: 0; padding-left: 20px; line-height: 1.8; color: var(--muted); }

.section { padding: 62px 0; }
.section.alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
h2 { margin: 0 0 18px; font-size: clamp(1.35rem, 2.5vw, 2rem); }
.section-lead { color: var(--muted); margin: 0 0 18px; }

.grid { display: grid; gap: 14px; }
.cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.card h3 { margin-top: 0; margin-bottom: 8px; }
.card p { margin: 0; color: var(--muted); line-height: 1.6; }
.card.code code {
  display: block;
  margin-top: 8px;
  padding: 10px;
  border-radius: 8px;
  background: #0f1529;
  border: 1px solid var(--border);
  color: #9ec1ff;
}

.timeline { display: grid; gap: 12px; }
.timeline-item {
  border-left: 3px solid var(--primary);
  padding: 12px 14px;
  background: var(--card);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.timeline-item h3 { margin: 0 0 6px; }
.timeline-item p { margin: 0; color: var(--muted); }

.site-footer { border-top: 1px solid var(--border); padding: 34px 0 50px; background: #0a0f1e; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 16px; }
.site-footer h3, .site-footer h4 { margin-top: 0; }
.site-footer p, .site-footer li { color: var(--muted); }
.site-footer ul { margin: 0; padding-left: 16px; line-height: 1.8; }

.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.cta-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .cards-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .menu-toggle { display: inline-block; }
  .lang-switch { order: -1; }
  .menu {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    padding: 12px 4%;
    background: #0d1427;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 12px;
  }
  .menu.open { display: flex; }
  .cards-3, .footer-grid { grid-template-columns: 1fr; }
}