:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f7f9fc;
  color: #18202f;
}

body {
  margin: 0;
}

a {
  color: inherit;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(20px, 6vw, 72px);
  background: #ffffff;
  border-bottom: 1px solid #dfe5ee;
}

.brand {
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 20px;
}

nav a {
  color: #4b5870;
  text-decoration: none;
}

.hero {
  min-height: 72vh;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .7fr);
  gap: 48px;
  align-items: center;
  padding: 48px clamp(20px, 6vw, 72px) 72px;
  background:
    linear-gradient(135deg, rgba(20, 99, 255, .10), rgba(0, 163, 145, .12)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1400' height='900' viewBox='0 0 1400 900'%3E%3Crect width='1400' height='900' fill='%23f7f9fc'/%3E%3Cg fill='none' stroke='%23ced8e8' stroke-width='2' opacity='.7'%3E%3Cpath d='M110 650 C320 450 460 760 690 520 S1040 310 1280 520'/%3E%3Cpath d='M120 220 C340 190 520 310 710 230 S1010 90 1250 170'/%3E%3C/g%3E%3Cg fill='%23ffffff' stroke='%23c9d5e6'%3E%3Crect x='152' y='154' width='238' height='102' rx='8'/%3E%3Crect x='918' y='188' width='270' height='120' rx='8'/%3E%3Crect x='570' y='570' width='300' height='118' rx='8'/%3E%3C/g%3E%3C/svg%3E") center / cover no-repeat;
}

.eyebrow {
  color: #1463ff;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(48px, 7vw, 92px);
  line-height: 1;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  color: #33415b;
  font-size: 21px;
  line-height: 1.5;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary,
.secondary {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 700;
  text-decoration: none;
}

.primary {
  background: #1463ff;
  color: #ffffff;
}

.secondary {
  background: #ffffff;
  color: #18202f;
  border: 1px solid #cdd7e7;
}

.demo-chat,
.course-card {
  border: 1px solid #dce3ee;
  border-radius: 8px;
  background: rgba(255, 255, 255, .92);
  padding: 22px;
  box-shadow: 0 18px 42px rgba(37, 55, 87, .10);
}

.band,
.page,
.course-page {
  padding: 56px clamp(20px, 6vw, 72px);
}

.steps,
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.price {
  font-weight: 800;
}

.breadcrumbs {
  color: #66758f;
  margin-bottom: 28px;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .site-header {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }
}