:root {
  --primary: #1D5175;
  --border: #e5e7eb;
  --light: #f8fafc;
  --dark: #0f172a;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background: var(--light);
  color: #111827;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* HEADER */
header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: 1200px;
  margin: auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}

nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #334155;
  font-weight: 500;
}

nav a.btn {
  background: var(--primary);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
}

/* FOOTER */
footer {
  background: var(--dark);
  color: #cbd5f5;
  margin-top: auto;
  padding: 40px 24px;
}

.footer {
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
}

.footer a {
  color: #cbd5f5;
  text-decoration: none;
  margin-left: 16px;
}