:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #8e8e8e;
  --border: #efefef;
  --primary: #ff6b4a;
  --secondary: #3db8a0;
  --surface: #f7f7f5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    "Pretendard",
    "Apple SD Gothic Neo",
    "Noto Sans KR",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(255, 107, 74, 0.08), transparent 55%),
    radial-gradient(ellipse 70% 40% at 100% 0%, rgba(61, 184, 160, 0.07), transparent 50%),
    var(--bg);
  line-height: 1.65;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  border-radius: 7px;
  background: linear-gradient(145deg, var(--primary), #ff8a70);
  color: #fff;
  font-size: 12px;
  line-height: 1;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
}

.nav a[aria-current="page"] {
  color: var(--primary);
  font-weight: 600;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 72px;
}

.hero {
  margin-bottom: 36px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--secondary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(1.75rem, 4vw, 2.15rem);
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  display: block;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--primary);
  text-decoration: none;
  transform: translateY(-2px);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  margin: 0 0 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.section:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.section h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.section p {
  margin: 0;
  white-space: pre-line;
}

.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 48px;
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer p {
  margin: 0 0 8px;
}