:root{
  --bg:#0f1222; --card:#171a2b; --text:#eaeaf2; --muted:#a9adc1; --accent:#8ec5ff; --accent2:#ffc6e0;
  --ok:#7be495; --warn:#ffd166; --danger:#ff6b6b; --border:#2a2e45;
}
:root.light{
  --bg:#f8fafc; --card:#ffffff; --text:#10121a; --muted:#475569; --accent:#2563eb; --accent2:#e879f9;
  --ok:#16a34a; --warn:#eab308; --danger:#dc2626; --border:#e5e7eb;
}
html[data-theme="dark"] :root{}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Apple SD Gothic Neo,AppleGothic,Noto Sans KR,Malgun Gothic,sans-serif}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.ef-header{position:sticky;top:0;background:rgba(15,18,34,.8);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);z-index:10}
.ef-header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav a{margin:0 10px;color:var(--muted);text-decoration:none}
.nav a:hover{color:var(--text)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);text-decoration:none}
.logo{width:28px;height:28px}
.button{background:var(--accent);border:none;border-radius:10px;color:#0b1020;padding:10px 16px;text-decoration:none;display:inline-block;font-weight:600;box-shadow:0 6px 18px rgba(142,197,255,.25)}
.button:hover{filter:brightness(1.05)}
.button.outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.button.small{padding:6px 10px;border-radius:8px}
.button.wide{width:100%}
.header-actions{display:flex;align-items:center;gap:8px}
.hero{padding:56px 0;border-bottom:1px solid var(--border)}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center}
.hero-visual .placeholder-visual{height:280px;border-radius:18px;border:1px dashed var(--border);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.pulse .circle{position:absolute;width:140px;height:140px;border-radius:999px;border:2px solid var(--accent);opacity:.3;animation:pulse 2.4s infinite}
.pulse .circle.delay{animation-delay:.6s}
.pulse .circle.delay2{animation-delay:1.2s}
@keyframes pulse{0%{transform:scale(0.6);opacity:.3}100%{transform:scale(2.2);opacity:0}}
.section{padding:48px 0}
.section.alt{background:linear-gradient(180deg,rgba(142,197,255,.06),transparent)}
.cards{display:grid;gap:16px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.cards.three{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:0 8px 24px rgba(0,0,0,.12)}
.card.highlight{outline:2px solid var(--accent)}
.card.form input, .card.form textarea, .card.form select{width:100%;padding:12px;border-radius:12px;border:1px solid var(--border);background:transparent;color:var(--text);margin:6px 0}
.price{font-size:24px;font-weight:800}
.center{text-align:center;margin-top:12px}
.bullets{list-style:disc;padding-left:18px;color:var(--muted)}
.divider{display:flex;align-items:center;gap:10px;margin:10px 0}
.divider span{color:var(--muted)}
.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border)}
.muted{color:var(--muted)}
.small{font-size:12px}
.narrow .container{max-width:720px}
.tab{padding:10px 14px;border:1px solid var(--border);background:transparent;border-radius:10px;margin-right:6px;color:var(--text)}
.tab.active{background:var(--card);outline:2px solid var(--accent)}
.tabpane{display:none;margin-top:16px}
.tabpane.active{display:block}
.list > div{padding:10px;border-bottom:1px dashed var(--border)}
.post h1{margin:0 0 8px 0}
.stats-box{border:1px dashed var(--border);border-radius:12px;padding:12px;min-height:96px}
.ef-footer{border-top:1px solid var(--border);padding:24px 0;margin-top:24px}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .cards.two{grid-template-columns:1fr}
  .cards.three{grid-template-columns:1fr}
}

.plain-list{list-style:none;padding-left:0;margin:0}
.plain-list li{padding:6px 0;border-bottom:1px dashed var(--border)}