:root{--ink:#1d2433;--mute:#5b6577;--line:#e3e7ee;--brand:#0b6bcb;--bg:#f7f9fc;--ok:#127a3a}
*{box-sizing:border-box}body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
header,footer{background:#fff;border-bottom:1px solid var(--line)}footer{border-top:1px solid var(--line);border-bottom:0;margin-top:40px;font-size:14px;color:var(--mute)}
.wrap{max-width:860px;margin:0 auto;padding:16px}
header .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.logo{font-weight:800;color:var(--ink);text-decoration:none;font-size:20px}.logo span{color:var(--brand)}
nav a{color:var(--mute);text-decoration:none;margin-left:14px;font-size:15px}
h1{font-size:28px;line-height:1.2;margin:18px 0 8px}h2{font-size:21px;margin-top:28px}
.lead{color:var(--mute);margin-top:0}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;margin:16px 0}
select,input,button,.button{font:inherit}
select{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff}
.tool{border:1px solid var(--line);border-radius:10px;padding:14px;margin:12px 0;background:#fff}
.tool h3{margin:0 0 4px}.spec{margin:0 0 10px;color:var(--mute)}
.drop{display:block;border:2px dashed #b9c4d6;border-radius:10px;padding:18px;text-align:center;cursor:pointer;color:var(--brand);font-weight:600}
.drop input{display:block;margin:10px auto 0;max-width:100%}
.adv{margin:10px 0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px;margin-top:8px}
.grid label{font-size:14px;color:var(--mute)}.grid input,.grid select{width:100%;padding:8px;border:1px solid var(--line);border-radius:6px}
button,.button{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:11px 18px;font-weight:700;cursor:pointer;text-decoration:none}
button:disabled{opacity:.5;cursor:default}
.out{margin-top:12px}.preview{max-width:100%;max-height:260px;border:1px solid var(--line);display:block;margin-bottom:8px;background:#fff}
.result{margin:6px 0 10px}.err{color:#b42318}.notice{background:#fff8e6;border:1px solid #f2d27a;padding:10px;border-radius:8px}
.badge{font-size:12px;background:#fff3cd;color:#7a5b00;border:1px solid #f2d27a;border-radius:20px;padding:2px 8px;vertical-align:middle}
.exams{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:8px;padding:0;list-style:none}
.exams a{display:block;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;text-decoration:none;color:var(--ink)}
table{width:100%;border-collapse:collapse;background:#fff}td,th{border:1px solid var(--line);padding:8px;text-align:left;font-size:15px}
.priv{color:var(--ok);font-weight:600}

.badge.info{background:#e8f1ff;color:#1d4ed8;border-color:#bcd3fb}
.checknote{background:#fff1f0;border:1px solid #f5b7b1;padding:10px 12px;border-radius:8px;margin:12px 0}