:root {
  --color-bg: #0f172a;
  --color-primary: #2dd4bf;
  --color-secondary: #6366f1;
  --color-text: #0f172a;
  --color-text-light: #f8fafc;
  --color-card-bg: #ffffff;
  --spacing: clamp(1rem, 3vw, 1.75rem);
  --radius: 18px;
  font-family: "Pretendard", "Noto Sans KR", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--color-text);
  background: #f1f5f9;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

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

.hero {
  padding: var(--spacing) clamp(1.5rem, 5vw, 6rem) calc(var(--spacing) * 2);
  background: radial-gradient(circle at top right, #38bdf8 0%, #0f172a 55%);
  color: var(--color-text-light);
  min-height: 75vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
}

.logo {
  font-size: 1.375rem;
  letter-spacing: 1px;
}

.cta {
  padding: 0.65rem 1.3rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.cta:hover {
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.hero__content {
  max-width: 560px;
  padding-top: clamp(3rem, 10vw, 6rem);
}

.hero__content h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  margin-bottom: 1rem;
  line-height: 1.22;
}

.hero__content p {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  opacity: 0.9;
  margin-bottom: 1.8rem;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn {
  background: var(--color-primary);
  color: var(--color-text);
  box-shadow: 0 15px 35px rgba(45, 212, 191, 0.25);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 45px rgba(45, 212, 191, 0.3);
}

.secondary-btn {
  background: var(--color-secondary);
  color: var(--color-text-light);
  box-shadow: 0 15px 35px rgba(99, 102, 241, 0.25);
}

.secondary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 45px rgba(99, 102, 241, 0.3);
}

.section {
  padding: clamp(4rem, 8vw, 6rem) clamp(1.5rem, 6vw, 6rem);
  text-align: center;
}

.section h2 {
  font-size: clamp(1.85rem, 3.2vw, 2.4rem);
  margin-bottom: 0.8rem;
}

.section p {
  max-width: 540px;
  margin: 0 auto;
  color: #475569;
}

.cards {
  display: grid;
  gap: 1.6rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--color-card-bg);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  border-radius: var(--radius);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.card p {
  color: #475569;
  margin: 0;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 55px rgba(15, 23, 42, 0.12);
}

.section--highlight {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(45, 212, 191, 0.15));
}

.benefits {
  list-style: none;
  padding: 0;
  margin: 2.2rem auto 0;
  display: grid;
  gap: 1rem;
  max-width: 520px;
}

.benefits li {
  background: var(--color-card-bg);
  padding: 1rem 1.4rem;
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  font-weight: 600;
  color: #1f2937;
}

.footer {
  padding: 2.5rem clamp(1.5rem, 6vw, 6rem);
  text-align: center;
  color: #94a3b8;
  font-size: 0.95rem;
}

@media (min-width: 720px) {
  .cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .benefits {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}