:root{
  --bg:#faf6ef;--bg-2:#f0e9dc;--ink:#2a1e14;--ink-dim:#6a5b47;--ember:#a85a1a;--line:rgba(42,30,20,.12);
  --font-display:'Fraunces', Georgia, serif;--font-mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace;
}
[data-theme="dark"]{
  --bg:#0d0a07;--bg-2:#17110a;--ink:#ece3d4;--ink-dim:#a3957c;--ember:#e79a63;--line:rgba(236,227,212,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font-mono);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--ember);text-decoration:none}
a:hover{text-decoration:underline}

.nav{display:flex;align-items:center;justify-content:space-between;padding:20px 32px;border-bottom:1px solid var(--line)}
.brand{font-family:var(--font-display);font-weight:600;font-size:24px;color:var(--ink);text-decoration:none}
.brand:hover{text-decoration:none}
.brand .accent{color:var(--ember)}
.nav a{font-size:13px}

.wrap{max-width:820px;margin:0 auto;padding:40px 24px 80px}
.crumb{font-size:12px;color:var(--ink-dim);margin-bottom:16px}
.crumb a{color:var(--ink-dim)}
h1{font-family:var(--font-display);font-weight:600;font-size:clamp(32px,5vw,46px);line-height:1.1;letter-spacing:-.01em;margin-bottom:12px;text-align:center}
.sub{color:var(--ink-dim);font-size:15px;margin:0 auto 28px;max-width:640px;text-align:center}

/* tool box */
.tool-box{border:1px solid var(--line);border-radius:16px;padding:24px;background:linear-gradient(180deg, rgba(231,154,99,.05), transparent);margin-bottom:36px}
.row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.btn{font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;padding:12px 18px;border-radius:10px;cursor:pointer;border:1px solid var(--line);background:var(--bg-2);color:var(--ink);transition:all .15s}
.btn:hover{border-color:var(--ember);color:var(--ember)}
.btn.primary{background:#c9792f;color:#1a120a;border-color:transparent;font-weight:500}
.btn.primary:hover{color:#1a120a;filter:brightness(1.06)}
.btn:disabled{opacity:.4;cursor:not-allowed}
label{font-size:13px;color:var(--ink-dim)}
input[type=range]{-webkit-appearance:none;appearance:none;height:3px;background:var(--line);border-radius:2px;min-width:140px;flex:1}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:15px;height:15px;border-radius:50%;background:var(--ember);cursor:pointer}
.val{color:var(--ember);font-size:13px;min-width:52px;text-align:right}
.status{font-size:12px;color:var(--ink-dim);margin-top:12px;min-height:18px}
.hint{font-size:11px;color:var(--ink-dim);opacity:.8}

/* seo sections */
.seo-text{font-size:14px;color:var(--ink-dim);margin-bottom:36px}
.seo-text p{margin-bottom:14px}
.seo-text h2{font-family:var(--font-display);font-weight:600;font-size:22px;color:var(--ink);margin:26px 0 12px}
.howto{margin-bottom:36px}
.howto h2,.faq h2,.related h2{font-family:var(--font-display);font-weight:600;font-size:22px;margin-bottom:16px}
.howto ol{padding-left:22px;color:var(--ink-dim);font-size:14px}
.howto li{margin-bottom:10px}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{font-family:var(--font-display);font-size:17px;font-weight:500;cursor:pointer;list-style:none;display:flex;justify-content:space-between}
.faq summary::after{content:'+';color:var(--ember);font-size:20px}
.faq details[open] summary::after{content:'–'}
.faq details p{color:var(--ink-dim);font-size:13px;padding-top:10px}
.related{margin-bottom:40px}
.related .links{display:flex;gap:10px;flex-wrap:wrap}
.related a{border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:12px;color:var(--ink-dim)}
.related a:hover{border-color:var(--ember);color:var(--ember);text-decoration:none}

.foot{border-top:1px solid var(--line);padding:30px 24px;text-align:center;color:var(--ink-dim);font-size:12px}
.foot a{color:var(--ink-dim)}

/* rich article sections */
.updated{font-size:11px;color:var(--ink-dim);margin:-4px 0 18px;text-align:center}
h2.block{font-family:var(--font-display);font-weight:600;font-size:24px;margin:34px 0 14px}
.seo-text h3,.howto h3{font-family:var(--font-display);font-weight:600;font-size:18px;margin:16px 0 8px}
.usecases{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-bottom:36px}
.usecase{border:1px solid var(--line);border-radius:12px;padding:16px}
.usecase h3{font-family:var(--font-display);font-weight:600;font-size:16px;margin-bottom:6px}
.usecase p{font-size:12px;color:var(--ink-dim)}
.tips li{margin-bottom:12px;color:var(--ink-dim);font-size:14px}
table.cmp{width:100%;border-collapse:collapse;font-size:13px;margin:14px 0 26px}
table.cmp th,table.cmp td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
table.cmp th{color:var(--ink-dim);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
table.cmp td:first-child{color:var(--ink-dim)}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;margin-bottom:40px}
.related-grid a{border:1px solid var(--line);border-radius:12px;padding:14px;display:block;color:var(--ink);text-decoration:none;transition:border-color .15s}
.related-grid a:hover{border-color:var(--ember)}
.related-grid .t{font-family:var(--font-display);font-weight:600;font-size:15px;display:block;margin-bottom:4px}
.related-grid .d{font-size:11px;color:var(--ink-dim);display:block}

/* audio preview */
.preview{border:1px solid var(--line);border-radius:12px;padding:16px;margin:14px 0}
.preview-top{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:4px}
.preview-title{font-family:var(--font-display);font-weight:600;font-size:15px}
.time{font-size:11px;color:var(--ink-dim)}
.fname{font-size:12px;color:var(--ink-dim);margin-bottom:10px;word-break:break-all}
.wave-wrap{margin-bottom:10px;cursor:pointer;border-radius:6px;overflow:hidden}
.wave-wrap canvas{display:block;width:100%;height:64px;background:rgba(0,0,0,0.2)}
.preview-controls{display:flex;gap:10px}

/* processing panel */
.proc{border:1px solid var(--line);border-radius:12px;padding:18px;margin:14px 0}
.proc-warn{font-size:12px;color:var(--ink-dim);margin-bottom:14px}
.proc-title{font-size:14px;color:var(--ink);margin-bottom:12px}
.proc input[type=range]{width:100%}
.proc-pct{font-size:22px;font-weight:600;color:var(--ember);margin:6px 0 4px;font-family:var(--font-display)}
.proc-sub{font-size:12px;color:var(--ink-dim);margin-bottom:6px}
.proc-eta{font-size:12px;color:var(--ink-dim);margin-bottom:14px}

/* mobile */
@media(max-width:640px){
  .wrap{padding:24px 14px 56px}
  .tool-box{padding:16px}
  .btn{padding:11px 13px;font-size:12px}
  .preview-controls{flex-wrap:wrap}
  .usecases{grid-template-columns:1fr}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .cmp{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
  .proc{padding:14px}
  .preview{padding:14px}
  .crumb{font-size:11px}
}