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

body {
  background: #f8fafc;
  color: #1e293b;
  font-family: Pretendard, sans-serif;
  line-height: 1.7;
}

a {
  text-decoration: none;
}

.container {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  background: white;
  border-bottom: 1px solid #e2e8f0;
}

.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: #2563eb;
}

nav {
  display: flex;
  gap: 20px;
}

nav a {
  color: #334155;
  font-weight: 600;
}

.site-footer {
  margin-top: 80px;
  padding: 40px 0;
  border-top: 1px solid #e2e8f0;
  background: white;
  text-align: center;
}

.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 55%, #f8fafc 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.badge {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 7px 14px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1d4ed8;
  font-size: 0.9rem;
  font-weight: 800;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.2;
  letter-spacing: -0.04em;
  color: #0f172a;
}

.hero p {
  margin-top: 22px;
  max-width: 680px;
  color: #475569;
  font-size: 1.15rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 14px;
  font-weight: 800;
}

.btn.primary {
  background: #2563eb;
  color: white;
}

.btn.secondary {
  background: white;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

.section {
  padding: 64px 0;
}

.section h2 {
  margin-bottom: 24px;
  font-size: 2rem;
  color: #0f172a;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.info-card {
  padding: 28px;
  border: 1px solid #e2e8f0;
  border-radius: 24px;
  background: white;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.info-card h3 {
  margin-bottom: 10px;
  color: #172554;
  font-size: 1.25rem;
}

.info-card p {
  color: #475569;
}

@media (max-width: 800px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    height: auto;
    padding: 18px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  nav {
    flex-wrap: wrap;
  }
}

.page-title {
  margin-top: 12px;
  font-size: clamp(2rem, 4vw, 3rem);
  color: #0f172a;
  letter-spacing: -0.04em;
}

.page-desc {
  margin-top: 14px;
  margin-bottom: 32px;
  max-width: 720px;
  color: #475569;
  font-size: 1.08rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.post-card {
  padding: 26px;
  border: 1px solid #e2e8f0;
  border-radius: 24px;
  background: white;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.post-card h2 {
  margin: 12px 0;
  font-size: 1.25rem;
  line-height: 1.4;
}

.post-card h2 a {
  color: #172554;
}

.post-card p {
  color: #475569;
}

.post-category {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 0.85rem;
  font-weight: 800;
}

.post-meta {
  margin-top: 18px;
  color: #64748b;
  font-size: 0.9rem;
}

.post-detail {
  max-width: 820px;
  margin: 0 auto;
  padding: 42px;
  border: 1px solid #e2e8f0;
  border-radius: 28px;
  background: white;
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.07);
}

.post-detail h1 {
  margin: 18px 0 14px;
  font-size: clamp(2rem, 4vw, 2.7rem);
  line-height: 1.25;
  color: #0f172a;
}

.post-lead {
  color: #475569;
  font-size: 1.1rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 24px;
  color: #2563eb;
  font-weight: 800;
}

.post-content {
  margin-top: 32px;
  line-height: 1.85;
}

.post-content h2 {
  margin-top: 40px;
  color: #172554;
}

.post-content p {
  margin: 16px 0;
}

@media (max-width: 800px) {
  .post-grid {
    grid-template-columns: 1fr;
  }

  .post-detail {
    padding: 28px 22px;
  }
}