:root {
  --blue: #1aa3e0;
  --blue-dark: #0b6ea3;
  --ink: #163044;
  --muted: #5c6b78;
  --bg: #f4f8fb;
  --line: #d7e3ec;
  --white: #fff;
  --radius: 16px;
  --shadow: 0 12px 32px rgba(16, 48, 68, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.55;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-dark); }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #071722;
  color: #fff;
}
.header .wrap { position: relative; }
.page-hero { min-height: 280px; }
.page-hero h1 { font-size: clamp(28px, 4vw, 44px); }
.prose { max-width: 800px; }
.prose p { margin: 0 0 14px; }
.header-top {
  display: flex;
  justify-content: flex-end;
  gap: 18px;
  padding: 8px 0 0;
  font-size: 14px;
}
.header-top a { color: #d7eefb; text-decoration: none; }
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 0 14px;
}
.logo img { height: 64px; width: auto; }
.menu { display: flex; gap: 8px; align-items: center; list-style: none; margin: 0; padding: 0; }
.menu > li { position: relative; }
.menu a {
  color: #fff;
  text-decoration: none;
  padding: 8px 10px;
  display: block;
  font-size: 15px;
}
.menu a:hover, .menu a.active { color: #8fd6ff; }
.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 8px;
  list-style: none;
}
.submenu a { color: var(--ink); }
.menu li:hover .submenu, .menu li:focus-within .submenu { display: block; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 12px 20px;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
}
.btn:hover { background: var(--blue-dark); }
.btn.light { background: #fff; color: var(--blue-dark); }
.burger {
  display: none;
  background: transparent;
  color: #fff;
  border: 1px solid #4a6273;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

.hero {
  min-height: 520px;
  background: linear-gradient(100deg, rgba(7, 23, 34, 0.72), rgba(11, 110, 163, 0.35)), url("../assets/hero.jpg") center/cover no-repeat;
  color: #fff;
  display: flex;
  align-items: center;
}
.hero h1 { font-size: clamp(36px, 6vw, 64px); line-height: 1.05; margin: 0 0 12px; max-width: 680px; }
.kicker { letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; color: #b9e6ff; margin-bottom: 8px; }
.hero p { font-size: 20px; max-width: 560px; }

.section { padding: 72px 0; }
.section.alt { background: var(--bg); }
.section h2 { font-size: 34px; margin: 0 0 12px; }
.lead { color: var(--muted); max-width: 720px; }

.features, .cards, .prices, .stats, .faq { display: grid; gap: 16px; }
.features { grid-template-columns: repeat(4, 1fr); margin-top: 28px; }
.cards { grid-template-columns: repeat(3, 1fr); }
.prices { grid-template-columns: repeat(3, 1fr); }
.stats { grid-template-columns: repeat(4, 1fr); }
.card, .price, .feature, .stat {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.feature, .stat, .price { padding: 22px; }
.card img { height: 180px; width: 100%; object-fit: cover; }
.card div, .feature { padding: 18px 18px 22px; }
.feature { padding: 22px; }
.card h3, .price h3, .feature h3 { margin: 0 0 8px; }
.price .sum { font-size: 28px; font-weight: 800; color: var(--blue-dark); margin: 8px 0; }
.note { color: var(--muted); font-size: 14px; }
.stat strong { display: block; font-size: 36px; color: var(--blue-dark); }

.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
}
.faq summary { cursor: pointer; font-weight: 700; }
.form {
  display: grid;
  gap: 12px;
  background: #fff;
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
}
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.contact-list { list-style: none; padding: 0; }
.contact-list li { margin: 8px 0; }

.footer { background: #071722; color: #d5e4ee; padding: 40px 0 20px; }
.footer a { color: #9fd8f5; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; }
.footer small { display: block; margin-top: 24px; color: #8aa0ae; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(7, 23, 34, 0.62);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 30;
}
.modal.open { display: flex; }
.modal-card { width: min(480px, 100%); background: #fff; border-radius: 18px; padding: 22px; position: relative; }
.modal-card h2 { margin-top: 0; }
.close {
  position: absolute;
  top: 10px;
  right: 12px;
  border: 0;
  background: transparent;
  font-size: 28px;
  cursor: pointer;
}
.ok { display: none; background: #e8f8ee; color: #146c36; border-radius: 10px; padding: 10px 12px; }

@media (max-width: 900px) {
  .header-top { flex-wrap: wrap; justify-content: flex-start; gap: 8px 14px; font-size: 12px; }
  .features, .cards, .prices, .stats, .footer-grid, .two { grid-template-columns: 1fr 1fr; }
  .burger { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 40px; }
  .nav { flex-wrap: wrap; }
  .menu {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #071722;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    z-index: 30;
  }
  .menu.open { display: flex; }
  .submenu { position: static; display: block; background: transparent; box-shadow: none; padding-left: 8px; }
  .submenu a { color: #d7eefb; }
  .menu .btn { width: 100%; margin-top: 8px; }
}
@media (max-width: 640px) {
  .features, .cards, .prices, .stats, .footer-grid, .two { grid-template-columns: 1fr; }
  .logo img { height: 48px; }
}