:root{
  --bg:#0b0f14;
  --card:#111826;
  --text:#e6edf3;
  --muted:#9fb0c0;
  --line:#223044;
  --accent:#7dd3fc;
  --accent2:#a7f3d0;
  --warn:#fca5a5;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 16px;
  --max: 980px;
}
*{box-sizing:border-box; scroll-behavior: smooth;}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Apple SD Gothic Neo", "Noto Sans KR", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 15% 10%, rgba(125,211,252,.12), transparent 60%),
              radial-gradient(900px 500px at 85% 30%, rgba(167,243,208,.08), transparent 55%),
              var(--bg);
  color:var(--text);
  line-height:1.7;
}
a{color:inherit; text-decoration: none; transition: color 0.2s;}
a:hover{color: var(--accent);}
header{
  position:sticky; top:0;
  backdrop-filter: blur(12px);
  background: rgba(11,15,20,.75);
  border-bottom: 1px solid rgba(34,48,68,.6);
  z-index:100;
}
.nav{
  max-width:var(--max);
  margin:0 auto;
  padding: 16px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.brand{
  display:flex; align-items:center; gap:12px;
  font-weight:800;
  font-size: 1.1rem;
  letter-spacing:-0.5px;
}
.logo{
  width:32px; height:32px; border-radius:8px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}
.wrap{
  max-width:var(--max);
  margin: 0 auto;
  padding: 40px 20px 100px;
}
.article-header{
    text-align: center;
    margin-bottom: 50px;
}
.article-header h1{
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
}
.meta{
    color: var(--muted);
    font-size: 14px;
}
.content{
    background: var(--card);
    border: 1px solid var(--line);
    padding: 50px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.content h2{
    color: var(--accent);
    margin-top: 40px;
}
.content p{
    margin-bottom: 20px;
}
.content ul, .content ol{
    margin-bottom: 20px;
    padding-left: 20px;
}
.content li{
    margin-bottom: 10px;
}
.blog-list{
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}
.blog-item{
    background: var(--card);
    border: 1px solid var(--line);
    padding: 30px;
    border-radius: var(--radius);
    transition: transform 0.2s, border-color 0.2s;
}
.blog-item:hover{
    transform: translateY(-5px);
    border-color: var(--accent);
}
.blog-item h2{
    margin-top: 0;
    margin-bottom: 10px;
}
.blog-item p{
    color: var(--muted);
    margin-bottom: 0;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:8px;
  padding:12px 20px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(17,24,38,0.8);
  color: var(--text);
  font-weight:600;
  cursor:pointer;
  transition: all 0.2s ease;
}
.btn:hover{
  border-color: var(--accent);
  background: rgba(34,48,68,0.8);
}
footer{
  margin-top: 100px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
@media (max-width: 768px){
  .article-header h1{font-size: 2rem;}
  .content{padding: 30px;}
}