:root{
  --bg:#f6f7f9; --card:#fff; --ink:#16181d; --muted:#6b7280;
  --line:#e4e7ec; --acc:#2563eb; --acc2:#1d4ed8; --ok:#0f9d58; --err:#d93025;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px rgba(16,24,40,.06);
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1015;--card:#161a22;--ink:#e8eaef;--muted:#9aa3b2;--line:#252b36;--shadow:none}
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.wrap{width:100%;max-width:920px;margin:0 auto;padding:0 20px}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
.nav{border-bottom:1px solid var(--line);background:var(--card)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-block:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;color:var(--ink)}
.brand:hover{text-decoration:none}
.logo{width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--acc),#7c3aed);display:block}
.nav nav{display:flex;gap:18px;font-size:14px}
.nav nav a{color:var(--muted)}
main.wrap{padding-block:36px 56px}
.hero h1{font-size:32px;line-height:1.2;margin:0 0 10px}
.lead{color:var(--muted);margin:0 0 26px;font-size:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);margin-bottom:28px}
.card.center{text-align:center}
.drop{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;
  border:2px dashed var(--line);border-radius:var(--radius);padding:40px 20px;cursor:pointer;
  transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--acc);background:rgba(37,99,235,.04)}
.drop small{color:var(--muted)}
.ic{width:34px;height:34px;border-radius:50%;border:2px solid var(--acc);position:relative;margin-bottom:6px}
.ic::before{content:"";position:absolute;left:50%;top:9px;width:2px;height:15px;background:var(--acc);transform:translateX(-50%)}
.ic::after{content:"";position:absolute;left:50%;top:9px;width:9px;height:9px;border-left:2px solid var(--acc);
  border-top:2px solid var(--acc);transform:translate(-50%,0) rotate(45deg)}
.picked{display:flex;justify-content:space-between;gap:12px;margin-top:14px;font-size:14px;
  background:rgba(127,127,127,.08);padding:10px 12px;border-radius:9px}
.picked span:last-child{color:var(--muted);white-space:nowrap}
.bar{height:7px;background:rgba(127,127,127,.16);border-radius:99px;margin-top:14px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--acc);transition:width .2s}
.btn{display:inline-block;margin-top:16px;background:var(--acc);color:#fff;border:0;
  padding:11px 22px;border-radius:9px;font-size:15px;font-weight:600;cursor:pointer}
.btn:hover{background:var(--acc2);text-decoration:none;color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.small{margin:0;padding:9px 16px;font-size:14px}
.err{color:var(--err);margin:12px 0 0;font-size:14px}
.done h2{margin-top:0}
.linkrow{display:flex;gap:8px;flex-wrap:wrap}
.linkrow input{flex:1 1 220px;min-width:0;padding:10px 12px;border:1px solid var(--line);
  border-radius:9px;background:var(--bg);color:var(--ink);font-size:14px}
.muted{color:var(--muted);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.grid h3{margin:0 0 6px;font-size:16px}
.grid p{margin:0;color:var(--muted);font-size:14px}
.file h1{font-size:22px;word-break:break-all;margin-top:0}
.meta{list-style:none;padding:0;margin:0 0 18px;border-top:1px solid var(--line)}
.meta li{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
.meta span{color:var(--muted)}
.prose h2{font-size:17px;margin:26px 0 8px}
.prose p,.prose li{color:var(--ink)}
.prose code{background:rgba(127,127,127,.14);padding:1px 5px;border-radius:5px;font-size:13px}
.foot{border-top:1px solid var(--line);background:var(--card);padding-block:22px;
  color:var(--muted);font-size:13px}
.foot p{margin:4px 0}
@media (max-width:520px){.hero h1{font-size:26px}.card{padding:20px}}