*{box-sizing:border-box}
:root{--bg:#fafafa;--fg:#1a1a1a;--muted:#666;--brand:#0f766e;--line:#e3e3e3;--card:#fff}
@media(prefers-color-scheme:dark){:root{--bg:#111;--fg:#eee;--muted:#9a9a9a;--brand:#2dd4bf;--line:#2a2a2a;--card:#1a1a1a}}
body{margin:0;font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--fg)}
.wrap{max-width:960px;margin:0 auto;padding:0 18px}
a{color:var(--brand)}
.site-header{border-bottom:1px solid var(--line);background:var(--card);position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:58px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.4rem;text-decoration:none;color:var(--fg)}
.logo span{color:var(--brand)}
nav a{margin-left:16px;text-decoration:none;color:var(--fg);font-size:.95rem}
nav a:hover,nav a.active{color:var(--brand)}
.menu-btn{display:none;background:none;border:0;font-size:1.5rem;color:var(--fg)}
@media(max-width:760px){.menu-btn{display:block}nav{display:none;width:100%;padding-bottom:10px}nav.open{display:block}nav a{display:block;margin:0;padding:8px 0}}
main{padding-top:28px;padding-bottom:40px}
h1{font-size:2rem;line-height:1.2;margin:.2em 0}
h2{margin-top:2em}
.lead{font-size:1.15rem;color:var(--muted)}
.hero{padding:16px 0 8px}
.muted{color:var(--muted)}.small{font-size:.85rem}
.tool{margin:20px 0;padding:18px;background:var(--card);border:1px solid var(--line);border-radius:14px}
.drop{border:2px dashed var(--brand);border-radius:12px;padding:38px 16px;text-align:center;cursor:pointer;transition:.15s}
.drop.over,.drop:hover,.drop:focus{background:rgba(15,118,110,.08);outline:none}
.drop .big{font-size:1.2rem;font-weight:700;margin:0}
.opts{display:flex;flex-wrap:wrap;gap:20px;align-items:center;margin:16px 0}
.opts input[type=range]{vertical-align:middle;width:160px}
.opts input[type=number]{width:80px;padding:4px}
.results{list-style:none;padding:0;margin:0}
.results li{display:flex;align-items:center;gap:12px;padding:10px 0;border-top:1px solid var(--line);flex-wrap:wrap}
.results img{width:52px;height:52px;object-fit:cover;border-radius:6px;background:repeating-conic-gradient(#ccc 0 25%,#fff 0 50%) 50%/12px 12px}
.results .name{flex:1;min-width:140px;word-break:break-all}
.results .sz{color:var(--muted);font-size:.85rem}
.btn,.results a.dl{display:inline-block;background:var(--brand);color:#fff;padding:8px 16px;border-radius:8px;text-decoration:none;border:0;font:inherit;cursor:pointer}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.card{display:block;padding:18px;background:var(--card);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--fg)}
.card:hover{border-color:var(--brand)}
.card h3{margin:0 0 6px;color:var(--brand)}.card p{margin:0;color:var(--muted)}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.contact{display:grid;gap:14px;max-width:520px}
.contact label{display:grid;gap:4px;font-weight:600}
.contact input,.contact textarea{padding:10px;border:1px solid var(--line);border-radius:8px;font:inherit;background:var(--card);color:var(--fg)}
.site-footer{border-top:1px solid var(--line);padding:22px 0;text-align:center;color:var(--muted);font-size:.9rem}
.site-footer p{margin:4px 0}