:root{
  /* Default = LIGHT (웹에서 밝게) */
  --bg:#ffffff;
  --card:#ffffff;
  --text:#141826;
  --muted:#5b647a;
  --brand:#5b48ff;
  --border:rgba(20,24,38,.10);
  --shadow:0 10px 26px rgba(20,24,38,.06);
}

/* Dark theme (explicit) */
:root[data-theme="dark"]{
  --bg:#0b0d12;
  --card:#111625;
  --text:#e9eefc;
  --muted:#a9b4d0;
  --brand:#7c5cff;
  --border:rgba(255,255,255,.10);
  --shadow:0 10px 26px rgba(0,0,0,.30);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans, Apple Color Emoji, Segoe UI Emoji;
  background: var(--bg);
  color:var(--text);
  line-height:1.7;
}
img{max-width:100%;height:auto}
a{color:inherit}
.container{max-width:1080px;margin:0 auto;padding:0 20px}

.header{
  position:sticky;top:0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom:1px solid var(--border);
  z-index:10;
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand b{letter-spacing:.2px;font-size:16px}
.brand small{display:block;color:var(--muted);font-size:12px;margin-top:-2px}
.navlinks{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.navlinks a{color:var(--muted);text-decoration:none;font-size:14px}
.navlinks a:hover{color:var(--text)}

.themeToggle{border:1px solid var(--border);background:transparent;color:var(--muted);padding:8px 10px;border-radius:12px;font-size:13px}
.themeToggle:hover{color:var(--text)}

.hero{padding:34px 0 14px}
.hero h1{font-size:38px;line-height:1.2;margin:0 0 10px}
.hero p{margin:0;color:var(--muted);max-width:70ch}
.hero .cta{margin-top:18px;display:flex;gap:12px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;gap:10px;padding:10px 14px;border-radius:12px;text-decoration:none;border:1px solid var(--border);background:rgba(255,255,255,.04)}
.button.primary{background:var(--brand);border-color:transparent;color:white;font-weight:700}
.button:hover{border-color:rgba(255,255,255,.22)}

.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px;padding:18px 0 48px}
.grid.squares{gap:14px}

.card{grid-column:span 4;background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.card .thumb{aspect-ratio: 21/9;background:#0f1422;display:block}
.card .thumb img{width:100%;height:100%;object-fit:cover;display:block}
:root:not([data-theme="dark"]) .card .thumb img{filter: brightness(1.08) contrast(1.03) saturate(1.05)}
:root:not([data-theme="dark"]) .article .content img{filter: brightness(1.06) contrast(1.02) saturate(1.04)}
.card .inner{padding:10px}
.card h3{margin:0 0 6px;font-size:16px;line-height:1.25}
.card p{margin:0;color:var(--muted);font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .meta{margin-top:8px;color:var(--muted);font-size:12px;display:flex;gap:10px;flex-wrap:wrap}

/* Square cards (homepage) */
.card.square{grid-column:span 3}
.card.square .thumb{aspect-ratio:1/1;position:relative}
.card .badge{position:absolute;left:10px;top:10px;background:rgba(0,0,0,.55);color:white;border:1px solid rgba(255,255,255,.18);padding:6px 10px;border-radius:999px;font-size:12px;backdrop-filter: blur(6px)}
:root[data-theme="dark"] .card .badge{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.18)}

@media (max-width: 1024px){
  .card.square{grid-column:span 6}
}

@media (max-width: 1024px){
  .card{grid-column:span 6}
}
@media (max-width: 820px){
  .nav{align-items:flex-start;flex-direction:column}
  .navlinks{gap:10px}

  .card{grid-column:span 12}
  .card.square{grid-column:span 6}
  .hero h1{font-size:32px}
  .hero{padding:22px 0 10px}
}
@media (max-width: 440px){
  .card.square{grid-column:span 12}
}

.article{padding:26px 0 56px}
.article h1{font-size:36px;line-height:1.2;margin:0 0 10px}
.article .meta{color:var(--muted);font-size:13px;margin-bottom:18px}
.article .content{max-width:78ch}
.article .content :is(h2,h3){margin-top:30px}
.article .content a{color:#0a7ea4}
:root[data-theme="dark"] .article .content a{color:#b9f6ff}

.article .content img{
  display:block;
  width:100%;
  max-width:480px;
  height:auto;
  margin:12px auto;
  border-radius:14px;
  border:1px solid var(--border);
}

.credit{margin-top:18px;color:var(--muted);font-size:12px}
.credit a{color:var(--muted)}

.footer{border-top:1px solid var(--border);padding:20px 0 40px;color:var(--muted);font-size:13px}