:root {
  --bg: #f4f8fb;
  --surface: #ffffff;
  --text: #1a2b3c;
  --muted: #5a6b7d;
  --accent: #0d7a6f;
  --accent-light: #e6f5f3;
  --border: #dbe4ec;
  --shadow: 0 12px 40px rgba(26, 43, 60, 0.08);
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.hero {
  background: linear-gradient(135deg, #0d7a6f 0%, #145ea8 100%);
  color: #fff;
  padding: 1.5rem 1.5rem 4rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto 3rem;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
}

.nav a {
  opacity: 0.9;
}

.nav a:hover {
  opacity: 1;
  text-decoration: underline;
}

.hero-content {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.15rem;
  opacity: 0.95;
}

.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-alt {
  background: var(--accent-light);
  max-width: none;
  padding-left: calc((100% - 960px) / 2 + 1.5rem);
  padding-right: calc((100% - 960px) / 2 + 1.5rem);
}

.section h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card h3 {
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.checklist {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.checklist li {
  background: var(--surface);
  border-radius: 12px;
  padding: 0.9rem 1rem 0.9rem 2.5rem;
  position: relative;
  box-shadow: var(--shadow);
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 1rem;
  color: var(--accent);
  font-weight: 700;
}

.note {
  margin-top: 1.5rem;
  color: var(--muted);
}

.tips {
  display: grid;
  gap: 1rem;
}

.tip {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--surface);
  border-radius: 14px;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
}

.tip span {
  font-weight: 700;
  color: var(--accent);
  min-width: 2rem;
}

.footer {
  text-align: center;
  padding: 2rem 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .nav {
    justify-content: center;
  }

  .section-alt {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}