:root{
  --ink:#1c2a22; --ink-2:#4d5e53; --line:#d6e0d1; --bg:#f6f8f3; --card:#fff;
  --tint:#eaf1e6; --accent:#c4a5f5; --accent-ink:#2a1a4a; --dark:#16231c;
  --radius:16px;
}
@media (prefers-color-scheme:dark){
  :root{ --ink:#e8efe6; --ink-2:#a8b8ac; --line:#2c3b31; --bg:#111a15; --card:#18241d;
    --tint:#1f2e25; --accent:#b996f0; --accent-ink:#1a0f30; }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  line-height:1.55;word-break:keep-all}
a{color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.top{padding:48px 0 24px}
.eyebrow{font-size:13px;letter-spacing:.08em;color:var(--ink-2);text-transform:uppercase}
h1{font-size:clamp(28px,5vw,44px);line-height:1.2;margin:8px 0 10px;letter-spacing:-.02em}
.lead{color:var(--ink-2);font-size:17px;margin:0}
.crumb{display:inline-block;margin-top:28px;font-size:14px;color:var(--ink-2);text-decoration:none}
.crumb:hover{color:var(--ink)}

/* hub list */
.talks{list-style:none;padding:0;margin:24px 0 64px;display:grid;gap:14px}
.talk{display:grid;grid-template-columns:200px 1fr;gap:20px;align-items:center;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);padding:14px;text-decoration:none;transition:transform .15s,border-color .15s}
.talk:hover{transform:translateY(-2px);border-color:var(--accent)}
.talk img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px;display:block;background:var(--tint)}
.talk .date{font-size:13px;color:var(--ink-2)}
.talk h2{margin:2px 0 4px;font-size:21px}
.talk p{margin:0;color:var(--ink-2);font-size:15px}
.empty{color:var(--ink-2)}
@media (max-width:560px){ .talk{grid-template-columns:1fr} }

/* talk page */
.actions{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 8px}
.btn{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:15px;
  padding:10px 16px;border-radius:999px;cursor:pointer;text-decoration:none;display:inline-flex;gap:6px;align-items:center}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}
.btn:hover{filter:brightness(.97)}
.grid{list-style:none;padding:0;margin:20px 0 64px;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.grid li{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:zoom-in}
.grid img{width:100%;aspect-ratio:16/9;display:block;background:var(--tint)}
.grid .cap{padding:10px 14px;font-size:14px;display:flex;gap:10px}
.grid .cap b{color:var(--ink-2);font-weight:500;min-width:1.6em}

/* viewer */
.viewer{position:fixed;inset:0;background:#0b100d;display:none;flex-direction:column;z-index:10;color:#eee}
.viewer.open{display:flex}
.viewer .stage{flex:1;display:flex;align-items:center;justify-content:center;min-height:0;padding:12px;touch-action:pan-y}
.viewer img{max-width:100%;max-height:100%;object-fit:contain;border-radius:6px;user-select:none}
.viewer .bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;font-size:14px}
.viewer .bar .t{flex:1;text-align:center;opacity:.85;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.viewer button{background:#ffffff14;border:0;color:#fff;font:inherit;padding:8px 14px;border-radius:999px;cursor:pointer}
.viewer button:hover{background:#ffffff26}

/* qr */
.qr{position:fixed;inset:0;background:#000c;display:none;align-items:center;justify-content:center;z-index:20;padding:16px}
.qr.open{display:flex}
.qr .box{background:#fff;color:#111;border-radius:20px;padding:28px;text-align:center;max-width:92vw}
.qr #qrcode{display:flex;justify-content:center}
.qr #qrcode img,.qr #qrcode canvas{width:min(70vw,360px)!important;height:auto!important}
.qr .url{margin-top:14px;font-size:15px;word-break:break-all}
footer{padding:24px 0 40px;color:var(--ink-2);font-size:13px;border-top:1px solid var(--line)}