:root{
  --bg:#f4f5f8; --card:#fff; --line:#e3e5ea; --text:#1d2129; --muted:#6b7280;
  --accent:#e5322d; --accent-dark:#c4221d; --ok:#1f9d55; --err:#d93025; --soft:#fdecec;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);
     min-height:100vh;display:flex;flex-direction:column}
a{color:inherit}

/* header */
.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top .in{max-width:1180px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none}
.logo{width:32px;height:32px;border-radius:9px;background:var(--accent);display:grid;place-items:center;
      color:#fff;font-weight:800;font-size:19px;line-height:1}
.logo svg{width:14px;height:14px;fill:#fff;margin-left:2px}
.brand b{font-size:19px;font-weight:800;letter-spacing:-.3px}
.nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{text-decoration:none;font-size:14px;font-weight:600;padding:8px 12px;border-radius:8px;white-space:nowrap;color:#374151}
.nav a:hover,.nav a.on{background:var(--soft);color:var(--accent)}

main{flex:1;width:100%;max-width:1180px;margin:0 auto;padding:36px 16px 56px}
.narrow{max-width:760px}
.hero{text-align:center;margin-bottom:34px}
h1{font-size:clamp(26px,5vw,40px);line-height:1.15;margin:0 0 10px;letter-spacing:-.8px;font-weight:800}
.sub{color:var(--muted);margin:0 auto;font-size:17px;max-width:620px}

/* home grid */
.filters{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:26px}
.filters button{background:#fff;color:var(--text);border:1px solid var(--line);border-radius:99px;
                padding:8px 16px;font-weight:600;font-size:14px}
.filters button.on{background:var(--text);color:#fff;border-color:var(--text)}
.grid-tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.tool{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;text-decoration:none;
      display:flex;flex-direction:column;gap:10px;transition:.15s}
.tool:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.07);border-color:#d5d8de}
.tool h3{margin:0;font-size:17px}
.tool p{margin:0;color:var(--muted);font-size:14px;line-height:1.45}
.badge{width:44px;height:44px;border-radius:11px;color:#fff;font-weight:800;font-size:12px;display:grid;
       place-items:center;letter-spacing:.3px}
.tool.feature{grid-column:1/-1;flex-direction:row;align-items:center;background:linear-gradient(120deg,#fff 55%,#fdecec)}
.tool.feature .badge{width:54px;height:54px;flex-shrink:0}

/* buttons, inputs */
button{font:inherit;font-weight:600;border:0;border-radius:10px;padding:12px 20px;cursor:pointer;
       background:var(--accent);color:#fff;transition:.15s}
button:hover{background:var(--accent-dark)}
button:disabled{opacity:.5;cursor:default}
.ghost{background:#fff;border:1px solid var(--line);color:var(--text)}
.ghost:hover{background:#f7f7f9}
.big{width:100%;padding:16px;font-size:17px;border-radius:12px}
.msg{margin-top:14px;padding:12px 14px;border-radius:10px;font-size:14px;display:none}
.msg.err{display:block;background:#fdeceb;border:1px solid #f5c2be;color:var(--err)}
.msg.ok{display:block;background:#e9f7ef;border:1px solid #bfe5cd;color:var(--ok)}
.panel{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}

/* tool page */
.drop{border:2px dashed #cfd3da;border-radius:16px;background:#fff;padding:44px 20px;text-align:center;cursor:pointer;transition:.15s}
.drop.over{border-color:var(--accent);background:var(--soft)}
.drop .pick{display:inline-block;margin-top:6px;padding:16px 34px;font-size:18px;border-radius:12px}
.drop small{display:block;color:var(--muted);margin-top:12px}
.files{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:8px}
.files li{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.files .ext{font-size:11px;font-weight:800;color:#fff;border-radius:6px;padding:4px 6px;min-width:40px;text-align:center}
.files .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}
.files .sz{color:var(--muted);font-size:13px}
.files button{background:transparent;color:var(--muted);padding:6px 8px;font-size:15px}
.files button:hover{background:#f1f2f4;color:var(--text)}
.opts{display:grid;gap:14px;margin-top:18px}
.opts label,.opts .optrow{display:grid;gap:6px;font-size:14px;font-weight:600}
.opts select,.opts input,.url-form input{font:inherit;font-size:16px;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--text);width:100%}
.opts select:focus,.opts input:focus{outline:2px solid #f6b9b6;border-color:var(--accent)}
.add-more{margin-top:10px;width:100%}
.bar{height:10px;background:#eceef2;border-radius:99px;overflow:hidden;margin-top:18px}
.bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .25s}
.bar.busy i{width:35%!important;animation:slide 1.1s infinite ease-in-out}
@keyframes slide{0%{transform:translateX(-100%)}100%{transform:translateX(300%)}}
.ptext{margin-top:8px;font-size:14px;color:var(--muted);text-align:center}
.result{text-align:center;padding:30px 20px}
.result .tick{width:62px;height:62px;border-radius:50%;background:#e9f7ef;color:var(--ok);display:grid;place-items:center;margin:0 auto 12px;font-size:30px}
.result h2{margin:0 0 6px}
.result .info{color:var(--ok);font-weight:600;margin:0 0 18px}
.result a.dl{display:block;text-decoration:none;background:var(--accent);color:#fff;padding:16px;border-radius:12px;font-weight:700;font-size:17px}
.result .ghost{margin-top:10px;width:100%}
.back{display:inline-block;margin-bottom:18px;color:var(--muted);text-decoration:none;font-size:14px}
.back:hover{color:var(--accent)}
.hidden{display:none!important}

/* youtube */
.url-form{display:flex;gap:10px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px}
.url-form input{border:0;padding:12px 10px;outline:none;flex:1;min-width:0}
.vid{display:flex;gap:16px}
.vid img{width:180px;aspect-ratio:16/9;object-fit:cover;border-radius:10px;background:#000;flex-shrink:0}
.vid h2{font-size:17px;margin:2px 0 6px;line-height:1.3}
.meta{color:var(--muted);font-size:14px}
.qgrid{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.q{background:#fff;border:1px solid var(--line);color:var(--text);padding:10px 16px}
.q:hover{background:#f7f7f9}
.q.on{border-color:var(--accent);background:var(--soft);color:var(--accent)}
.how{margin-top:40px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.how div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.how b{display:block;color:var(--accent);font-size:22px;margin-bottom:4px}
.how span{color:var(--muted);font-size:14px}

/* signature pad */
.sigwrap{position:relative}
.sig{width:100%;height:180px;background:#fff;border:1px dashed #cfd3da;border-radius:10px;touch-action:none;cursor:crosshair;display:block}
.sigclear{position:absolute;top:8px;right:8px;padding:6px 12px;font-size:13px}
.sighint{position:absolute;left:12px;bottom:8px;color:#b0b5bf;font-size:12px;font-weight:500;pointer-events:none}

/* result preview */
.preview{display:block;max-width:100%;max-height:360px;margin:0 auto 16px;border-radius:10px;border:1px solid var(--line);
  background:repeating-conic-gradient(#eceef2 0% 25%,#fff 0% 50%) 50%/18px 18px}

/* "new" pill on home cards */
.tool{position:relative}
.pill{position:absolute;top:14px;right:14px;background:#4f6bed;color:#fff;font-size:11px;font-weight:700;padding:3px 8px;border-radius:99px}

/* related tools */
.related{margin-top:40px}
.related h2{font-size:18px;margin:0 0 12px}
.rel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.rel{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;
     text-decoration:none;font-weight:600;font-size:14px}
.rel:hover{border-color:#cfd3da;background:#fafbfc}
.badge.sm{width:32px;height:32px;border-radius:8px;font-size:10px;flex-shrink:0}

/* SEO article */
.article{margin-top:44px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px clamp(18px,4vw,40px);
         line-height:1.7;font-size:16px;color:#2b2f38}
.article h2{font-size:22px;line-height:1.3;margin:30px 0 10px;color:var(--text)}
.article h2:first-child{margin-top:0}
.article h3{font-size:17px;margin:22px 0 6px;color:var(--text)}
.article p{margin:0 0 14px}
.article ul,.article ol{padding-left:22px;margin:0 0 14px}
.article li{margin-bottom:6px}
.article a{color:var(--accent);font-weight:600;text-decoration:none}
.article a:hover{text-decoration:underline}
.article table{width:100%;border-collapse:collapse;margin:6px 0 18px;font-size:15px;display:block;overflow-x:auto}
.article th,.article td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.article th{background:#f7f8fa}

footer{color:var(--muted);font-size:13px;text-align:center;padding:22px 16px;border-top:1px solid var(--line);background:#fff}

@media (max-width:600px){
  main{padding-top:24px}
  .url-form{flex-direction:column}
  .vid{flex-direction:column}
  .vid img{width:100%}
  .how{grid-template-columns:1fr}
  .tool.feature{flex-direction:column;align-items:flex-start}
  .nav a.hide-sm{display:none}
}