:root{
  --bg:#0a0a0a;
  --card:#111111;
  --line:#2a2a2a;
  --text:#f2f2f2;
  --muted:#a3a3a3;
  --soft:#171717;
  --chip:#1a1a1a;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
.wrap{max-width:1240px;margin:18px auto;padding:0 14px 6px}
h1{margin:0 0 12px;font-size:22px;font-weight:700;letter-spacing:.2px}

.layout{display:grid;grid-template-columns:260px 1fr;gap:12px;align-items:start}
.sidebar{position:sticky;top:12px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px}
.side-title{font-size:13px;color:#d9d9d9;margin-bottom:8px}

.content{min-width:0}
.searchbar{background:var(--card);border:1px solid var(--line);padding:10px;border-radius:12px}
.searchbar input{width:100%;padding:10px 12px;background:#0f0f0f;border:1px solid var(--line);color:var(--text);border-radius:8px;outline:none}
.searchbar input:focus{border-color:#555}

.tagbox{display:flex;gap:6px;flex-wrap:wrap}
.side-tags{max-height:62vh;overflow:auto;padding-right:2px}
.chip{display:inline-flex;align-items:center;gap:5px;padding:4px 8px;border:1px solid #303030;border-radius:999px;background:var(--chip);color:#cfcfcf;cursor:pointer;user-select:none;line-height:1}
.chip input{display:none}
.chip span{font-size:11px}
.chip b{font-size:10px;font-weight:600;color:#9f9f9f}
.chip.active{color:#fff}
.chip.active b{color:#fff}
.chip.has-count b{color:#ff4d4f;opacity:1}

.actions{display:flex;gap:8px}
.side-actions{margin-top:10px}
button,.reset{padding:7px 12px;border-radius:8px;border:1px solid #3a3a3a;text-decoration:none;cursor:pointer;font-size:13px}
button{background:#1e1e1e;color:#f4f4f4}
button:hover{background:#242424}
.reset{background:#141414;color:#d0d0d0}
.reset:hover{background:#1b1b1b}

.meta{margin:8px 0;color:var(--muted);font-size:13px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.num-card{position:relative;overflow:visible;background:var(--card);border:1px solid #2c2c2c;border-radius:9px;padding:8px}
.num-main{font-size:20px;font-weight:760;letter-spacing:.6px;text-align:center;color:#efefef;padding:8px 6px;background:var(--soft);border:1px solid #2c2c2c;border-radius:7px}
.float-tags{position:absolute;top:-9px;right:-8px;display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end;max-width:80%;pointer-events:none}
.float-tag{font-size:10px;padding:2px 6px;border-radius:999px;border:1px solid #3d3d3d;background:#1c1c1c;color:#d7d7d7;line-height:1.2;box-shadow:0 2px 8px rgba(0,0,0,.35)}
.empty-card{background:var(--card);border:1px dashed #373737;border-radius:10px;padding:16px;color:var(--muted);text-align:center;grid-column:1/-1;font-size:13px}
.digit-hl{padding:0 1px;border-radius:4px;font-weight:900;background:var(--c-bg);color:var(--c-tx);border:1px solid var(--c-bd)}

/* preset colors */
.t-5a{--c-bg:#5b1e1e;--c-bd:#a43a3a;--c-tx:#ffd7d7}
.t-4a{--c-bg:#5a3618;--c-bd:#b26a2f;--c-tx:#ffe7c9}
.t-3a{--c-bg:#574815;--c-bd:#b89a2e;--c-tx:#fff1bf}
.t-straight4{--c-bg:#1f5c29;--c-bd:#3eac58;--c-tx:#d8ffe2}
.t-straight3{--c-bg:#1b5752;--c-bd:#38a69b;--c-tx:#d8fff9}
.t-mirror{--c-bg:#1f2f63;--c-bd:#4a73de;--c-tx:#dce8ff}
.t-love{--c-bg:#5e1f4b;--c-bd:#c24ea0;--c-tx:#ffd9f0}
.t-aabb{--c-bg:#3f2f67;--c-bd:#7c60c3;--c-tx:#e8dcff}
.t-aabbcc{--c-bg:#4d235b;--c-bd:#a149c1;--c-tx:#f3dcff}
.t-default{--c-bg:#232323;--c-bd:#666;--c-tx:#eee}

.chip.active{background:var(--c-bg);border-color:var(--c-bd);color:var(--c-tx)}
.chip.active b{color:#fff}
.float-tag{background:var(--c-bg);border-color:var(--c-bd);color:var(--c-tx)}

@media (max-width: 900px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .side-tags{max-height:none}
}


/* ---- interaction layout: independent scrolling regions ---- */
html,body{height:100%;overflow:hidden}
.wrap{height:100vh;display:flex;flex-direction:column}
.layout{flex:1;min-height:0;display:grid;grid-template-columns:260px 1fr;gap:0;align-items:start;overflow:visible}

.sidebar{position:sticky;top:0;height:auto;display:flex;flex-direction:column;align-self:start}
.side-tags{max-height:min(60vh,520px);overflow:auto;padding-right:2px;align-content:flex-start}

.content{min-width:0;height:100%;min-height:0;display:grid;grid-template-rows:auto auto 1fr auto;gap:8px}
.searchbar{position:sticky;top:0;z-index:5}
.cards{min-height:0;overflow:visible;align-content:start;padding:0}

@media (max-width: 900px){
  html,body{overflow:auto}
  .wrap{height:auto;display:block}
  .layout{display:grid;grid-template-columns:1fr}
  .sidebar{position:static;height:auto}
  .content{height:auto;display:block}
  .cards{overflow:visible}
}



.side-tags .chip{width:auto;max-width:100%;justify-content:flex-start;border-radius:999px;padding:5px 9px;line-height:1;display:inline-flex}
.side-tags .chip span{font-size:11px}
.side-tags .chip b{font-size:10px;margin-left:2px;min-width:unset;text-align:left}

.pager{display:flex;justify-content:center;align-items:center;gap:10px;margin:6px 0 0;padding:8px 0;background:var(--bg);border-top:1px solid #262626;position:sticky;bottom:0;z-index:4}
.pager button{padding:6px 12px;border-radius:8px;border:1px solid #3a3a3a;background:#1e1e1e;color:#f4f4f4}
.pager button:disabled{opacity:.35;cursor:not-allowed}
.pager span{font-size:13px;color:#cfcfcf}

.site-footer-placeholder{height:52px;display:flex;align-items:center;justify-content:center;color:#7f7f7f;font-size:12px;border-top:1px dashed #2d2d2d;margin-top:10px;flex:0 0 auto;position:relative;z-index:2;background:var(--bg)}


/* vertical separators between regions */
.layout{position:relative}
.sidebar{position:relative}
.sidebar::after{
  content:"";
  position:absolute;
  top:-10px;
  right:-7px;
  width:1px;
  height:calc(100% + 20px);
  background:linear-gradient(to bottom, transparent 0, #3a3a3a 8%, #3a3a3a 92%, transparent 100%);
}
.content{position:relative}
.content::before{
  content:"";
  position:absolute;
  left:-6px;
  top:0;
  width:1px;
  height:100%;
  background:rgba(70,70,70,.55);
}
@media (max-width: 900px){
  .sidebar::after,.content::before{display:none}
}


/* panel wireframe layout (match design sketch) */
.panel{
  border:1px solid #4a4a4a;
  background:transparent;
  display:grid;
  grid-template-rows:1fr 44px;
  min-height:calc(100vh - 96px);
}
.layout{
  margin:0;
  padding:0;
  border:0;
}
.sidebar{
  border-right:1px solid #4a4a4a;
  border-radius:0;
  background:transparent;
  margin-right:0;
  padding:12px;
}
.content{
  padding:10px 12px;
  border-left:0;
}
.site-footer-placeholder{
  margin:0;
  border-top:1px solid #4a4a4a;
  height:44px;
  background:transparent;
}
/* disable old decorative separators */
.sidebar::after,.content::before{display:none !important}

/* layout-separator fallback */


/* explicit center divider */
.layout{position:relative}
.layout::before{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:260px;
  width:1px;
  background:#4a4a4a;
  pointer-events:none;
}
@media (max-width: 900px){
  .layout::before{display:none}
}


/* remove sidebar wrapper box */
.sidebar{
  border:none !important;
  border-radius:0 !important;
  background:transparent !important;
  box-shadow:none !important;
  padding:12px !important;
  border-right:1px solid #4a4a4a !important;
}