:root {
  --primary-color: #0b5ed7;
  --text-dark: #1f2937;
  --text-muted: #6b7280;
  --bg-light: #f9fafb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background: #ffffff;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  padding: 16px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
}

.logo {
  font-size: 20px;
  font-weight: 700;
}

nav a {
  margin-left: 24px;
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  color: var(--primary-color);
}

/* HERO */
.hero {
  padding: 96px 48px;
  background: var(--bg-light);
  text-align: center;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto;
}

/* ABOUT */
#about {
  padding: 80px 48px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  max-width: 1100px;
  margin: auto;
}

#about img {
  width: 100%;
  border-radius: 8px;
}

#aboutText {
  font-size: 16px;
}

/* SECTIONS */
section {
  scroll-margin-top: 100px;
}