:root {
  --blue: #144a92;
  --blue-dark: #0d2f5e;
  --blue-soft: #eaf3ff;
  --text: #122033;
  --muted: #5d6b7b;
  --line: #d9e4f2;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(20, 74, 146, 0.16);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: #f7fbff;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: var(--blue); }
.brand-mark { font-size: 28px; letter-spacing: -1px; }
.brand-text { font-size: 14px; text-transform: uppercase; letter-spacing: 2px; }

.nav { display: flex; gap: 22px; color: var(--muted); font-size: 15px; }
.nav a:hover { color: var(--blue); }

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
  padding: clamp(50px, 8vw, 96px) clamp(20px, 5vw, 72px);
  background:
    radial-gradient(circle at top right, #dbeeff 0, transparent 36%),
    linear-gradient(135deg, #ffffff 0%, #eef7ff 100%);
}

.hero-content { max-width: 720px; }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-weight: 800; text-transform: uppercase; letter-spacing: 2px; font-size: 13px; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(36px, 5vw, 68px); line-height: 1.02; letter-spacing: -2px; margin-bottom: 24px; color: var(--blue-dark); }
h2 { font-size: clamp(28px, 3.2vw, 44px); line-height: 1.12; letter-spacing: -1px; color: var(--blue-dark); margin-bottom: 18px; }
h3 { font-size: 22px; color: var(--blue-dark); margin-bottom: 12px; }
p { color: var(--muted); line-height: 1.7; }
.lead { font-size: 20px; max-width: 600px; margin-bottom: 30px; }

.actions { display: flex; gap: 14px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid var(--blue);
  cursor: pointer;
}
.button.primary { color: var(--white); background: var(--blue); }
.button.secondary { color: var(--blue); background: var(--white); }
.button:hover { transform: translateY(-1px); box-shadow: 0 10px 25px rgba(20, 74, 146, 0.15); }

.hero-card {
  max-width: 430px;
  justify-self: center;
  border-radius: 28px;
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow);
}

.section { padding: 78px clamp(20px, 5vw, 72px); }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 12px 30px rgba(18, 32, 51, 0.04);
}

.catalog-section {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 40px;
  align-items: center;
  margin: 0 clamp(20px, 5vw, 72px) 78px;
  padding: clamp(32px, 5vw, 56px);
  border-radius: 34px;
  background: var(--blue-dark);
  overflow: hidden;
}
.catalog-section h2, .catalog-section p { color: var(--white); }
.catalog-section .eyebrow { color: #9dc8ff; }
.catalog-preview { border-radius: 24px; overflow: hidden; box-shadow: 0 24px 65px rgba(0,0,0,0.25); }

.contact-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  padding: 78px clamp(20px, 5vw, 72px);
  background: var(--white);
  border-top: 1px solid var(--line);
}
.contact-form { display: grid; gap: 16px; }
label { display: grid; gap: 8px; font-weight: 800; color: var(--blue-dark); }
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 15px 16px;
  font: inherit;
  background: #fbfdff;
}
input:focus, textarea:focus { outline: 3px solid var(--blue-soft); border-color: var(--blue); }

.footer { padding: 24px clamp(20px, 5vw, 72px); text-align: center; background: var(--blue-dark); }
.footer p { margin: 0; color: #dcecff; }

@media (max-width: 900px) {
  .hero, .catalog-section, .contact-section { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hero-card, .catalog-preview { max-width: 360px; }
}