:root{
 --bg:#ffffff; --card:#ffffff; --text:#000000; --muted:#777777;
 --border:#e5e5e5; --btn:#000000;
 --shadow:0 4px 12px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
body{margin:0;background:#fff;color:#000;font-family:Arial,system-ui}
.wrap{max-width:1200px;margin:0 auto;padding:16px}
.header{margin-bottom:12px}
.layout{display:grid;grid-template-columns:1fr 160px 1fr;gap:12px}
@media(max-width:900px){.layout{grid-template-columns:1fr}}
.card{border:1px solid var(--border);border-radius:10px;padding:12px;
 display:flex;flex-direction:column;min-height:520px;background:#fff;box-shadow:var(--shadow)}
.h{font-weight:700;margin-bottom:6px}
.select,.ta{width:100%;border:1px solid var(--border);border-radius:8px;padding:8px;background:#fff}
.ta{flex:1;resize:vertical}
.mid{display:flex;flex-direction:column;justify-content:center;gap:10px}
.btn{padding:10px;border-radius:8px;border:1px solid #000;
 background:#000;color:#fff;font-weight:700;cursor:pointer;text-align:center}
.btn:disabled{opacity:.4;cursor:not-allowed}
.footer{margin-top:12px;display:flex;justify-content:space-between;font-size:13px;color:#777;gap:10px;flex-wrap:wrap}
.footer a{color:#000;text-decoration:none}
.footer a:hover{text-decoration:underline}