:root{--bg:#0f1115;--card:#181b22;--line:#262a33;--fg:#e8eaf0;--muted:#8b92a3;--accent:#4f8cff;--danger:#e5484d}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.4 system-ui,Segoe UI,Roboto,sans-serif}
a{color:var(--accent)}
.top{display:flex;align-items:center;gap:24px;padding:12px 20px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.brand{color:var(--fg);text-decoration:none;font-size:18px}.brand b{color:var(--accent)}
.top nav{display:flex;gap:16px}.top nav a{color:var(--muted);text-decoration:none}.top nav a:hover{color:var(--fg)}
.actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.muted{color:var(--muted);font-size:13px}
.btn{background:#242833;color:var(--fg);border:1px solid var(--line);border-radius:8px;padding:8px 14px;cursor:pointer;font:inherit;display:inline-block}
.btn:hover{background:#2d3240}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.danger{background:var(--danger);border-color:var(--danger);color:#fff}
.wrap{max-width:900px;margin:24px auto;padding:0 16px}.wrap.wide{max-width:none;padding:0 12px}

/* grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:8px;margin-top:12px}
.tile{position:relative;aspect-ratio:1;background:var(--card);border-radius:8px;overflow:hidden;cursor:pointer;content-visibility:auto;contain-intrinsic-size:180px 180px}
.tile img{width:100%;height:100%;object-fit:cover;display:block;opacity:0;transition:opacity .25s}
.tile img.in{opacity:1}
.tile .vid{position:absolute;inset:0;display:grid;place-items:center;font-size:34px;color:#fff8;background:linear-gradient(135deg,#222836,#161922)}
.tile .badge{position:absolute;right:6px;bottom:6px;background:#000a;border-radius:6px;padding:2px 7px;font-size:12px}
.tile .chk{position:absolute;left:6px;top:6px;width:22px;height:22px;border-radius:50%;border:2px solid #fff;background:#0006;display:none}
.selecting .tile .chk{display:block}
.tile.sel{outline:3px solid var(--accent);outline-offset:-3px}.tile.sel .chk{background:var(--accent)}
.empty{text-align:center;margin-top:15vh}.big{font-size:20px}
#sentinel{height:1px}

/* upload */
.drop{border:2px dashed var(--line);border-radius:14px;padding:44px 16px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px}
.drop.over{border-color:var(--accent);background:#4f8cff14}
.drop p{margin:0;color:var(--muted)}.drop .big{color:var(--fg)}
.overall{display:flex;align-items:center;gap:12px;margin:18px 0}
.overall[hidden]{display:none}
.bar{flex:1;height:10px;background:var(--card);border-radius:6px;overflow:hidden}.bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.ulist{list-style:none;padding:0;margin:0}
.ulist li{display:flex;gap:10px;justify-content:space-between;padding:6px 10px;border-bottom:1px solid var(--line);font-size:13px}
.ulist .ok{color:#46c37b}.ulist .err{color:var(--danger)}
.done{font-size:18px;text-align:center}

/* slideshow */
.show{position:fixed;inset:0;background:#000;z-index:50;user-select:none}
.show[hidden]{display:none}
.stage{position:absolute;inset:0}
.layer{position:absolute;inset:0;display:grid;place-items:center;opacity:0;transition:opacity .5s ease;pointer-events:none}
.layer.on{opacity:1}
.layer img,.layer video{max-width:100%;max-height:100%;object-fit:contain}
.nav{position:absolute;top:50%;transform:translateY(-50%);background:#0007;color:#fff;border:0;width:52px;height:80px;font-size:26px;cursor:pointer;opacity:0;transition:opacity .25s;border-radius:8px;margin:0 10px}
.prev{left:0}.next{right:0}
.progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:#fff2}.progress i{display:block;height:100%;width:0;background:var(--accent)}
.controls{position:absolute;left:0;right:0;bottom:3px;display:flex;align-items:center;gap:14px;padding:14px 18px;background:linear-gradient(transparent,#000c);opacity:0;transition:opacity .25s}
.controls .grow{flex:1}.controls select{background:#242833;color:var(--fg);border:1px solid var(--line);border-radius:6px;padding:5px}
.check{display:flex;align-items:center;gap:4px}
.show.ui .nav,.show.ui .controls{opacity:1}
.show:not(.ui){cursor:none}
@media(max-width:600px){.grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:4px}.top{gap:12px;padding:10px}.controls{flex-wrap:wrap;gap:8px}}
.auth{display:flex;align-items:center;gap:10px}.auth form{margin:0}
.login{max-width:340px;margin:12vh auto;padding:24px;background:var(--card);border:1px solid var(--line);border-radius:12px}
.login h1{margin:0 0 16px;font-size:20px}.login p{margin:0 0 12px}.login label{display:block;margin-bottom:4px;color:var(--muted);font-size:13px}
.login input{width:100%;padding:9px 10px;background:var(--bg);border:1px solid var(--line);border-radius:8px;color:var(--fg);font:inherit}
.login .btn{width:100%}.errorlist{list-style:none;padding:0;margin:0 0 10px;color:var(--danger);font-size:13px}