:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(49, 110, 86, 0.22), transparent 40%),
    linear-gradient(180deg, #05070c 0%, #0a1118 100%);
  color: #ecf2fb;
  font-family: "Noto Sans", "Noto Sans KR", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  line-height: 1.75;
}

a {
  color: #b8d7ff;
}

a:hover {
  color: #d7e8ff;
}

.page-shell {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding: 24px 0 56px;
}

.page-header {
  display: grid;
  gap: 14px;
  margin-bottom: 28px;
}

.page-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand-link {
  color: #ffffff;
  font-size: 24px;
  font-weight: 800;
  text-decoration: none;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #eef5ff;
  text-decoration: none;
  font-size: 14px;
}

.page-hero {
  padding: 24px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(10, 18, 30, 0.82);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.page-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.12;
}

.page-hero p {
  margin: 0;
  font-size: 16px;
  color: rgba(230, 238, 251, 0.92);
}

.page-content {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.content-section {
  padding: 22px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.content-section h2 {
  margin: 0 0 12px;
  font-size: 24px;
  color: #ffffff;
}

.content-section h3 {
  margin: 18px 0 8px;
  font-size: 18px;
  color: #f6f8ff;
}

.content-section p,
.content-section li {
  color: rgba(233, 239, 248, 0.92);
  font-size: 15px;
}

.content-section ul {
  margin: 0;
  padding-left: 20px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.info-card {
  padding: 16px;
  border-radius: 14px;
  background: rgba(11, 20, 34, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.info-card h3 {
  margin-top: 0;
}

.page-footer {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(223, 232, 247, 0.72);
  font-size: 14px;
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 1040px);
    padding-top: 18px;
  }

  .page-hero,
  .content-section {
    padding: 18px;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .page-nav {
    gap: 8px;
  }

  .page-nav a {
    font-size: 13px;
  }
}