/* Apple HIG–inspired light UI (desktop) */
:root{
  --bg:#f2f2f7;
  --elevated:#ffffff;
  --ink:#1c1c1e;
  --secondary:rgba(60,60,67,.72);
  --tertiary:rgba(60,60,67,.48);
  --separator:rgba(60,60,67,.12);
  --fill:rgba(120,120,128,.12);
  --fill-strong:rgba(120,120,128,.2);
  --tint:#007aff;
  --tint-press:#0066d6;
  --green:#34c759;
  --radius:12px;
  --radius-lg:16px;
  --max:980px;
  --pad:20px;
  --nav-h:52px;
  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-l:env(safe-area-inset-left,0px);
  --safe-r:env(safe-area-inset-right,0px);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.47;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:var(--tint);text-decoration:none}
a:hover{opacity:.85}
a,button,summary{-webkit-tap-highlight-color:transparent}

.wrap{
  max-width:var(--max);margin:0 auto;
  padding:0 max(var(--pad),var(--safe-r)) calc(48px + var(--safe-b)) max(var(--pad),var(--safe-l));
}

/* Translucent nav */
.topbar{
  position:sticky;top:0;z-index:40;
  height:auto;
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  background:rgba(242,242,247,.72);
  border-bottom:0.5px solid var(--separator);
  margin:0 calc(-1 * max(var(--pad),var(--safe-l))) 0 calc(-1 * max(var(--pad),var(--safe-r)));
  padding:calc(6px + var(--safe-t)) max(var(--pad),var(--safe-r)) 6px max(var(--pad),var(--safe-l));
}
.topbar-inner{
  max-width:var(--max);margin:0 auto;
  min-height:var(--nav-h);
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
}
.brand{display:flex;flex-direction:column;gap:0;min-width:0}
.brand strong{font-size:17px;font-weight:600;letter-spacing:-.01em}
.brand span{color:var(--secondary);font-size:13px;font-weight:400}
.controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
label{color:var(--secondary);font-size:13px}
input[type=date],select,button,.btn{
  font:inherit;font-size:15px;border-radius:10px;border:0;
  background:var(--fill);color:var(--ink);padding:7px 12px;min-height:36px;
}
input[type=date],select{border:0.5px solid var(--separator);background:var(--elevated)}
button,.btn{
  background:var(--tint);color:#fff;font-weight:600;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
}
button:hover,.btn:hover{background:var(--tint-press)}
button.ghost,.btn.ghost{background:var(--fill);color:var(--tint);font-weight:600}
button.ghost:hover,.btn.ghost:hover{background:var(--fill-strong)}

/* Large title */
.hero{
  padding:8px 0 12px;background:transparent;border:0;box-shadow:none;margin:0;
}
.hero h1{
  margin:0 0 4px;font-size:34px;line-height:1.15;font-weight:700;letter-spacing:-.02em;
}
.hero p{margin:0;color:var(--secondary);font-size:15px;max-width:36rem;line-height:1.4}
.stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.stat{
  background:var(--elevated);color:var(--secondary);border-radius:999px;
  padding:5px 11px;font-size:13px;font-weight:500;
  border:0.5px solid var(--separator);
}

.tools{display:flex;gap:8px;flex-wrap:wrap;margin:4px 0 12px}
.tools button,.tools .btn{min-height:32px;font-size:14px;padding:6px 12px;border-radius:980px}

.toc-panel{
  background:var(--elevated);border-radius:var(--radius-lg);
  margin:0 0 16px;overflow:hidden;
  border:0.5px solid var(--separator);
}
.toc-panel > summary{
  list-style:none;cursor:pointer;padding:12px 16px;
  font-size:15px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;user-select:none;
}
.toc-panel > summary::-webkit-details-marker{display:none}
.toc-panel > summary::after{content:"›";color:var(--tertiary);font-size:20px;font-weight:400;transform:rotate(90deg)}
.toc-panel[open] > summary::after{transform:rotate(-90deg)}
.toc{
  display:flex;gap:8px;overflow-x:auto;-webkit-overflow-scrolling:touch;
  padding:0 12px 14px;scrollbar-width:none;flex-wrap:nowrap;
  border-top:0.5px solid var(--separator);
  padding-top:12px;
}
.toc::-webkit-scrollbar{display:none}
.toc a{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;
  background:var(--fill);color:var(--ink);border:0;border-radius:980px;
  padding:7px 12px;font-size:13px;font-weight:500;white-space:nowrap;
}
.toc a:hover{background:var(--fill-strong);text-decoration:none;opacity:1}
.toc-ico{width:16px;height:16px;border-radius:4px}
.toc-n{color:var(--secondary);font-variant-numeric:tabular-nums}

/* Inset grouped section */
.platform{
  background:var(--elevated);border:0.5px solid var(--separator);
  border-radius:var(--radius-lg);margin-bottom:12px;overflow:hidden;box-shadow:none;
}
.platform summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:12px 16px;min-height:52px;user-select:none;
}
.platform summary::-webkit-details-marker{display:none}
.platform summary:active{background:var(--fill)}
.plat-head{display:flex;align-items:center;gap:10px;min-width:0;flex:1}
.plat-ico{
  width:28px;height:28px;border-radius:7px;flex-shrink:0;
  background:var(--fill);object-fit:contain;
}
.plat-head h2{margin:0;font-size:17px;font-weight:600;letter-spacing:-.01em;min-width:0}
.meta{display:flex;align-items:center;gap:6px;color:var(--secondary);font-size:13px;white-space:nowrap}
.badge{
  background:var(--fill);border-radius:980px;padding:2px 8px;
  font-weight:500;color:var(--secondary);font-size:12px;
}
.chev{color:var(--tertiary);font-size:18px;font-weight:400;transition:transform .2s ease}
.platform[open] .chev{transform:rotate(90deg)}
.platform .body{padding:0;border-top:0.5px solid var(--separator)}
.note{color:var(--tertiary);font-size:12px;margin:0;padding:8px 16px 0}

ol{list-style:none;margin:0;padding:0;counter-reset:rank}
li{
  counter-increment:rank;
  display:grid !important;
  grid-template-columns:28px 88px minmax(0,1fr) !important;
  column-gap:12px;
  padding:10px 16px;
  border-bottom:0.5px solid var(--separator);
  align-items:center;
  min-height:72px;
}
li:last-child{border-bottom:0}
li:hover{background:rgba(0,0,0,.02)}
li::before{
  content:counter(rank);
  grid-column:1;grid-row:1;
  width:24px;height:24px;border-radius:980px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;
  background:var(--fill);color:var(--secondary);
}
li:nth-child(1)::before{background:#1c1c1e;color:#fff}
li:nth-child(2)::before{background:#3a3a3c;color:#fff}
li:nth-child(3)::before{background:#636366;color:#fff}

/* Unified media well: cover OR platform placeholder — same box */
li > .thumb-slot{
  grid-column:2;grid-row:1;
  width:88px;height:66px;border-radius:10px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  background:var(--fill);
  flex-shrink:0;
}
li > .thumb-slot.has-img{background:var(--fill)}
li > .thumb-slot.is-ph{
  background:linear-gradient(180deg, rgba(120,120,128,.10), rgba(120,120,128,.16));
}
li > .thumb-slot .thumb, li > .thumb{
  width:100%;height:100%;object-fit:cover;display:block;
}
li > .thumb-slot .thumb-ph{
  width:28px;height:28px;object-fit:contain;opacity:.92;
  border-radius:6px;
}

li > .main{
  grid-column:3;grid-row:1;min-width:0;
  display:flex;flex-direction:column;gap:3px;justify-content:center;
}
li > .main > .title-line, li > .main > a.title-line{
  font-size:16px;font-weight:500;line-height:1.35;color:var(--ink);
  letter-spacing:-.01em;overflow-wrap:anywhere;word-break:break-word;
}
li > .main > a.title-line:hover{color:var(--tint);opacity:1}
li > .main > .extra{
  margin:0;padding:0;border:0;background:transparent;
  color:var(--secondary);font-size:13px;font-weight:400;
  font-variant-numeric:tabular-nums;white-space:nowrap;
  max-width:100%;overflow:hidden;text-overflow:ellipsis;
}
li > .main > .extra-empty{display:none}

footer{
  margin-top:28px;color:var(--tertiary);font-size:12px;
  border-top:0;padding-top:8px;line-height:1.5;text-align:center;
}
footer a{color:var(--secondary);font-weight:500}

@media (max-width:860px){
  :root{--pad:16px}
  .hero h1{font-size:28px}
  .controls{width:100%}
  li{grid-template-columns:26px 76px minmax(0,1fr) !important;padding:10px 14px}
  li > .thumb-slot, li > .thumb-slot .thumb, li > .thumb{width:76px;height:57px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .chev{transition:none}
}
@media (prefers-color-scheme:dark){
  /* keep light intentionally — user prefers light reading */
}