:root{--bg:#f6f7f9;--card:#fff;--ink:#1d232b;--mute:#69737f;--line:#e3e7ec;--acc:#2f6fdf}
*{box-sizing:border-box}body{margin:0;font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:underline}
.top{display:flex;align-items:center;justify-content:space-between;max-width:960px;margin:0 auto;padding:18px 20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink)}.logo img{width:26px;height:26px}
.top nav a{margin-left:18px;color:var(--mute)}
main{max-width:960px;margin:0 auto;padding:10px 20px 60px}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;margin:26px 0 34px}
h1{font-size:34px;line-height:1.15;margin:0 0 12px}.lead{color:var(--mute);font-size:17px;margin:0 0 20px}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.drop{border:2px dashed #c9d3df;border-radius:12px;padding:34px 16px;text-align:center;color:var(--mute)}
.btn{display:inline-block;background:var(--acc);color:#fff;border:0;border-radius:9px;padding:10px 18px;font-weight:600;cursor:pointer}
.btn:hover{text-decoration:none;opacity:.92}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid h3{margin:0 0 6px;font-size:16px}.grid p{margin:0;color:var(--mute)}
table{width:100%;border-collapse:collapse}td,th{padding:9px 6px;border-bottom:1px solid var(--line);text-align:left}th{color:var(--mute);font-weight:500}
label{display:block;font-size:13px;color:var(--mute);margin:12px 0 4px}input{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;font:inherit}
.err{color:#c0392b;font-size:14px;margin-top:10px;display:none}
footer{max-width:960px;margin:0 auto;padding:24px 20px;color:var(--mute);font-size:13px;border-top:1px solid var(--line)}
@media(max-width:760px){.hero{grid-template-columns:1fr}.grid{grid-template-columns:1fr}h1{font-size:28px}}