:root {
  --background: #f5f9fb;
  --primary: #1565c0;
  --secondary: #1e88e5;
  --text: #1f2937;
  --card: #ffffff;
  --shadow: rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
}

header.hero {
  background: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
  color: white;
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin: 0 0 1rem;
}

.hero p {
  font-size: 1.1rem;
  max-width: 760px;
  margin: 0 auto 1.5rem;
}

button {
  border: none;
  padding: 0.9rem 1.6rem;
  font-size: 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
}

button#learnMoreBtn {
  background: white;
  color: var(--primary);
}

button#actionBtn {
  background: var(--secondary);
  color: white;
}

main {
  padding: 3rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.summary,
.action-section {
  background: var(--card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 16px 32px var(--shadow);
  margin-bottom: 2rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--card);
  border-radius: 1rem;
  padding: 1.75rem;
  box-shadow: 0 12px 24px var(--shadow);
}

.card h3 {
  margin-top: 0;
}

.action-section .tip {
  margin-top: 1rem;
  font-weight: 600;
}

footer {
  text-align: center;
  padding: 1.5rem 1rem;
  color: #64748b;
}

@media (max-width: 640px) {
  header.hero {
    padding: 3rem 1rem;
  }
}