:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --text: #f2f4f8;
  --muted: #9aa3b2;
  --accent: #5b8cff;
  --ok: #3dd68c;
  --warn: #ffb020;
  --danger: #ff6b6b;
  --border: #2a2f3a;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
  font-size: 16px; line-height: 1.45;
}
a { color: var(--accent); text-decoration: none; }
.top {
  position: sticky; top: 0; z-index: 20;
  background: rgba(15,17,21,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px; display: flex; align-items: center; gap: 12px;
}
.top h1 { font-size: 17px; margin: 0; font-weight: 700; flex: 1; }
.top nav { display: flex; gap: 8px; }
.top nav a {
  color: var(--muted); font-size: 14px; padding: 6px 10px; border-radius: 999px;
  border: 1px solid transparent;
}
.top nav a.active {
  color: var(--text); background: var(--card); border-color: var(--border);
}
.stats { color: var(--muted); font-size: 12px; padding: 8px 16px 0; }
.list { padding: 12px 12px 80px; display: flex; flex-direction: column; gap: 28px; }
.set {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
}
.set-head {
  padding: 12px 14px; display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--border);
}
.set-head .id { font-weight: 700; font-size: 14px; }
.set-head .meta { color: var(--muted); font-size: 12px; flex: 1; }
.imgs { display: flex; flex-direction: column; gap: 10px; padding: 12px; }
.img-wrap {
  position: relative; border-radius: 12px; overflow: hidden;
  background: #000; border: 2px solid transparent;
}
.img-wrap.saved { border-color: var(--ok); }
.img-wrap img {
  display: block; width: 100%; height: auto;
  -webkit-touch-callout: default;
  user-select: none;
  /* allow long-press native save */
  pointer-events: auto;
}
.badge {
  position: absolute; top: 8px; right: 8px;
  background: rgba(0,0,0,.65); color: #fff;
  font-size: 11px; padding: 4px 8px; border-radius: 999px;
  pointer-events: none;
}
.badge.ok { background: rgba(61,214,140,.9); color: #062; }
.actions {
  display: flex; gap: 8px; padding: 0 12px 14px; flex-wrap: wrap;
}
button, .btn {
  appearance: none; border: 0; border-radius: 12px;
  padding: 12px 14px; font-size: 15px; font-weight: 600;
  cursor: pointer; color: #fff; background: var(--accent);
  flex: 1; min-width: 100px; text-align: center;
}
button.secondary, .btn.secondary { background: #2a3140; color: var(--text); }
button.ok { background: var(--ok); color: #062016; }
button.danger { background: #3a2228; color: #ffb4b4; }
button:disabled { opacity: .45; }
.empty {
  text-align: center; color: var(--muted); padding: 60px 20px; font-size: 15px;
}
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  background: rgba(20,22,28,.95); color: #fff;
  border: 1px solid var(--border); border-radius: 14px;
  padding: 12px 16px; font-size: 14px; z-index: 50;
  display: none; max-width: 90vw; box-shadow: 0 10px 40px rgba(0,0,0,.4);
  align-items: center; gap: 12px;
}
.toast.show { display: flex; }
.toast button {
  flex: 0; padding: 8px 12px; font-size: 13px; background: var(--accent);
}
.hint {
  color: var(--muted); font-size: 12px; padding: 0 16px 8px;
}
.pager{display:flex;align-items:center;gap:10px;padding:10px 12px 0;position:sticky;top:52px;z-index:15;background:var(--bg)}
.pager span{min-width:80px;text-align:center;color:var(--muted);font-size:14px}
.pager button{flex:1;padding:10px}
.cover{position:relative;margin:12px;border-radius:12px;overflow:hidden;cursor:pointer}
.cover img{display:block;width:100%;height:auto}
.caption{white-space:pre-wrap;font-family:inherit;font-size:14px;line-height:1.6;margin:0 12px 12px;padding:12px;background:#11141a;border:1px solid var(--border);border-radius:12px}
.viewer{position:fixed;inset:0;z-index:40;background:#000;display:flex;flex-direction:column}
.vbar{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;color:#fff}
.vbar button{flex:0;min-width:70px}
.vtrack{flex:1;display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.vslide{position:relative;flex:0 0 100%;scroll-snap-align:center;display:flex;align-items:center;justify-content:center}
.vslide img{max-width:100%;max-height:100%;object-fit:contain;-webkit-touch-callout:default}
.vhint{color:#888;text-align:center;font-size:12px;margin:6px}
.big{font-size:17px;padding:16px;margin:0}