:root{
  --brand:#0f766e;--brand2:#0d9488;--amber:#f59e0b;--ink:#152029;--muted:#5b6b7c;
  --bg:#f6f8f8;--card:#fff;--line:#e2eae9;--green:#1e7d43;--red:#b3392e;--radius:12px;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}
a{color:var(--brand2)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.site{background:#0c2b28;color:#fff;padding:14px 0}
header.site .wrap{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.logo{font-weight:800;font-size:19px;color:#fff;text-decoration:none}
.logo .tick{color:var(--amber)}
nav.top{margin-left:auto;display:flex;gap:18px;font-size:14px}
nav.top a{color:#bfe0dc;text-decoration:none}
nav.top a:hover{color:#fff}
.hero{padding:34px 0 6px}
h1{font-size:30px;margin:0 0 8px;color:#0c2b28}
.sub{color:var(--muted);max-width:760px;font-size:16px}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 4px}
.badge{font-size:12.5px;background:#e6f2f0;color:var(--brand);padding:3px 10px;border-radius:20px}
.badge.priv{background:#e7f5ec;color:var(--green)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 4px rgba(15,60,55,.06)}
.dropzone{border:2px dashed #b7d6d2;text-align:center;padding:46px 22px;transition:.15s;margin-top:14px}
.dropzone.over{border-color:var(--brand2);background:#f0faf9}
.big-icon{font-size:44px;margin-bottom:8px}
.drop-title{font-size:18px;font-weight:600;margin:6px 0}
.linklike{background:none;border:0;color:var(--brand2);font:inherit;font-weight:700;cursor:pointer;text-decoration:underline;padding:0}
.note{font-size:13px;color:var(--muted)}
.note.center,.center{text-align:center}

/* tool layout */
.tool-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:18px;margin-top:16px;align-items:start}
@media(max-width:820px){.tool-grid{grid-template-columns:1fr}}
.preview-canvas{max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.15);display:block;margin:0 auto}
#previewWrap{min-height:120px;display:flex;align-items:center;justify-content:center;background:#0c2b28;border-radius:10px;padding:10px;overflow:hidden}
#previewWrap .ph{color:#8fb4af;font-size:14px}
#previewName{font-size:12.5px;color:var(--muted);text-align:center;margin:8px 0 0}

.ctl{margin:0 0 14px}
.ctl label{display:block;font-size:12.5px;font-weight:700;color:var(--ink);margin-bottom:4px}
.ctl .hint{font-weight:400;color:var(--muted)}
select,input[type=text],input[type=color],input[type=date],input[type=number]{
  width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff;color:var(--ink)}
input[type=color]{height:40px;padding:3px}
input[type=range]{width:100%}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.chk{display:flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;margin:8px 0}
.chk input{width:auto}
.presets{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.preset{font-size:12.5px;padding:6px 12px;border:1px solid var(--brand2);color:var(--brand2);background:#fff;border-radius:20px;cursor:pointer;font-weight:600}
.preset:hover{background:#f0faf9}

.primary,button.primary{display:inline-block;background:var(--brand2);color:#fff;border:0;border-radius:9px;padding:12px 22px;font-size:15px;font-weight:700;text-decoration:none;cursor:pointer}
.primary:hover{background:var(--brand)}
.primary[disabled]{opacity:.6;cursor:default}
button.ghost{padding:9px 16px;font-size:14px;font-weight:600;color:var(--brand2);background:#fff;border:1px solid var(--brand2);border-radius:8px;cursor:pointer}
.dl-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}

/* file list */
#fileList{margin:4px 0 10px;max-height:230px;overflow-y:auto}
.frow{display:flex;align-items:center;gap:8px;padding:6px 8px;border:1px solid var(--line);border-radius:8px;margin-bottom:6px;font-size:13px;background:#fff}
.frow.sel{border-color:var(--brand2);background:#f0faf9}
.frow .fn{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer;font-weight:600}
.frow .fd{color:var(--muted);cursor:pointer;white-space:nowrap;border-bottom:1px dashed #cbd5d3}
.frow .x{border:0;background:none;color:var(--red);cursor:pointer;font-size:14px}
.count-badge{font-size:13px;color:var(--muted);font-weight:400;margin-left:6px}

section.seo{background:#fff;border-top:1px solid var(--line);margin-top:34px;padding:34px 0}
section.seo h2{color:#0c2b28;font-size:22px}
section.seo h3{color:var(--brand);font-size:17px;margin-top:22px}
section.seo p,section.seo li{font-size:15px;color:#33404d}
.faq dt{font-weight:700;margin-top:16px}
.faq dd{margin:4px 0 0}
footer.site{background:#0c2b28;color:#9fc0bb;font-size:13px;padding:24px 0;margin-top:0}
footer.site a{color:#bfe0dc}
footer.site .disc{font-size:12px;color:#7ba39d;margin-top:8px;max-width:820px}
@media(max-width:480px){h1{font-size:24px}.dropzone{padding:32px 16px}.row2{grid-template-columns:1fr}}