:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --text: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-soft: #94a3b8;
  --border: #e2e8f0;
  --accent: #0284c7;
  --accent-hover: #0369a1;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--accent); text-decoration: none; }
.nav-links { display: flex; gap: 18px; font-size: 0.88rem; }
.nav-links a { color: var(--text-muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* layout */
main, .container {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 28px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }

header h1, h1 { font-size: 1.8rem; font-weight: 900; margin: 0 0 8px; color: var(--text); }
.lead, .subtitle { color: var(--text-muted); font-size: 1rem; margin: 0 0 40px; }

section { margin-bottom: 2.5rem; }
h2 { font-size: 1.15rem; margin-bottom: 0.9rem; color: var(--text); font-weight: 700; }
h3 { font-size: 1rem; font-weight: 700; margin: 20px 0 8px; color: var(--text); }
p { color: var(--text-body); font-size: 0.97rem; margin: 0 0 0.9rem; }
ul, ol { color: var(--text-body); font-size: 0.95rem; padding-left: 20px; margin-bottom: 12px; }
li { margin-bottom: 6px; }

/* service / article cards */
.card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease, background 0.15s ease;
}
.card .name { color: var(--text); font-weight: 700; }
.card .desc { color: var(--text-muted); }

/* primary: 운영 중인 서비스 — 크고 눈에 띄게 */
.card-service {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.4rem 1.6rem;
  background: linear-gradient(180deg, #f0f9ff 0%, var(--bg-alt) 100%);
}
.card-service:hover {
  border-color: var(--accent);
  box-shadow: 0 10px 28px rgba(2, 132, 199, 0.14);
  transform: translateY(-2px);
  text-decoration: none;
}
.card-service .emoji {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
}
.card-service .name { font-size: 1.18rem; }
.card-service .desc { font-size: 0.9rem; margin-top: 0.4rem; line-height: 1.6; }

/* secondary: 글 — 가볍고 리스트에 가깝게 */
.card-article {
  border: 1px solid transparent;
  border-bottom: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.5rem;
}
.card-article:hover {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  text-decoration: none;
}
.card-article .emoji {
  font-size: 1.15rem;
  flex-shrink: 0;
  width: 1.4em;
  text-align: center;
}
.card-article .name { font-size: 0.92rem; font-weight: 600; }
.card-article .desc { font-size: 0.8rem; margin-top: 0.2rem; }

.note {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 16px 0;
  font-size: 0.9rem;
  color: var(--text-body);
}

.cta {
  display: block;
  margin-top: 40px;
  padding: 16px;
  border-radius: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  text-align: center;
  font-weight: 700;
  color: var(--text);
}
.cta:hover { border-color: var(--accent); text-decoration: none; }

table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 0.88rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); color: var(--text-body); }
th { color: var(--text-muted); font-weight: 600; font-size: 0.8rem; }
td:not(:first-child), th:not(:first-child) { text-align: right; }
.table-wrap { overflow-x: auto; }

code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 0.85rem;
  color: var(--accent-hover);
}

footer { border-top: 1px solid var(--border); padding-top: 1.5rem; color: var(--text-muted); font-size: 0.85rem; }
footer a { color: var(--text-muted); text-decoration: none; margin-right: 1rem; }
footer a:hover { color: var(--text); text-decoration: underline; }

hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }