:root{
  --bg:#0b0c0f; --panel:#14161a; --muted:#9aa3ad; --text:#e7ecf2;
  --accent:#4da3ff; --accent-2:#63e6b6; --danger:#ff6b6b; --border:#24272d;
  --card:#1a1d22; --shadow:rgba(0,0,0,.35);
  --thumb:180px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:linear-gradient(180deg,#0b0c10 0%, #0b0c0f 100%);color:var(--text);font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif}

header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border);background:rgba(20,22,26,.7);backdrop-filter:blur(6px);position:sticky;top:0;z-index:10}
.brand{font-weight:700;letter-spacing:.2px}
.muted{color:var(--muted)}
.tiny{font-size:12px}

.layout{display:grid;grid-template-columns:320px 1fr;min-height:calc(100vh - 56px)}
#sidebar{border-right:1px solid var(--border);padding:16px;background:var(--panel)}
.panel{margin-bottom:16px}
.panel-title{font-weight:600;margin-bottom:8px}
.actions{display:flex;gap:8px;margin-bottom:8px}

.btn{appearance:none;border:1px solid var(--border);background:var(--card);color:var(--text);padding:8px 10px;border-radius:8px;cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:linear-gradient(90deg,var(--accent) 0%, var(--accent-2) 100%);color:#0b0c0f;border:0}
.btn.danger{border-color:transparent;background:#2a1214;color:#ffb7b7}
.btn:disabled{opacity:.5;cursor:not-allowed}

.row{display:flex;gap:12px;align-items:center}
.wrap{flex-wrap:wrap}
label{display:inline-flex;gap:6px;align-items:center}
select,input[type="text"],input[type="number"]{background:var(--card);border:1px solid var(--border);color:var(--text);padding:6px 8px;border-radius:8px;outline:none}
select:focus,input:focus{border-color:var(--accent)}
input[type="range"]{accent-color:var(--accent)}

#content{display:flex;flex-direction:column}
#controls{padding:16px;border-bottom:1px solid var(--border)}

.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(var(--thumb),1fr));gap:14px;padding:16px}
.card{position:relative;border:1px solid var(--border);background:var(--card);border-radius:12px;box-shadow:0 6px 18px var(--shadow);padding:8px}
.thumb{width:100%;height:auto;border-radius:6px;display:block}
.meta{font-size:12px;text-align:center;margin-top:6px;color:var(--muted)}
.badge{position:absolute;top:6px;left:6px;background:rgba(0,0,0,.55);padding:2px 6px;border-radius:999px;font-size:11px}

.controls{display:flex;justify-content:center;gap:8px;margin-top:8px}
.arrow{border:1px solid var(--border);background:rgba(255,255,255,.06);color:var(--text);padding:4px 8px;border-radius:6px;cursor:pointer;font-size:13px}
.arrow:disabled{opacity:.5;cursor:not-allowed}
.del{position:absolute;bottom:6px;right:6px;border:0;background:#2a1214;color:#ffb7b7;padding:4px 8px;border-radius:6px;cursor:pointer}

h3{margin:16px 16px 0 16px;font-weight:600}
#busy{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center}
.spinner{width:36px;height:36px;border-radius:50%;border:4px solid rgba(255,255,255,.15);border-top-color:var(--accent);animation:spin 1s linear infinite}
.busytext{font-size:14px}
a.small{font-size:12px;color:var(--muted);text-decoration:underline}
[hidden]{display:none !important}
@keyframes spin{to{transform:rotate(360deg)}}