:root {
  --primary: #1565c0;
  --primary-dark: #0d47a1;
  --surface: #f8f9fa;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #5f6368;
  --border: #e0e0e0;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(21, 101, 192, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background: var(--surface);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 2.5rem 1.5rem 3rem;
  text-align: center;
}

header h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

header p {
  opacity: 0.92;
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

nav.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

nav.top-nav a {
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

nav.top-nav a:hover,
nav.top-nav a.active {
  background: #fff;
  color: var(--primary);
  text-decoration: none;
}

main {
  max-width: 720px;
  margin: -1.5rem auto 3rem;
  padding: 0 1rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  padding: 2rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.card p,
.card li {
  color: var(--text);
  margin-bottom: 0.75rem;
}

.card ul,
.card ol {
  padding-left: 1.25rem;
  margin-bottom: 0.75rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff !important;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none !important;
  margin-top: 0.5rem;
  margin-right: 0.5rem;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background: var(--primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--primary) !important;
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(21, 101, 192, 0.08);
}

.alert {
  background: #e3f2fd;
  border: 1px solid #90caf9;
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.alert strong {
  color: var(--primary-dark);
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border);
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.steps li {
  margin-bottom: 0.5rem;
}

@media (max-width: 480px) {
  .card {
    padding: 1.25rem;
  }
}