body{min-height:100vh}
.wrap{width:min(1120px,92vw);margin:0 auto;padding:28px 0 42px}
    header{margin-bottom:30px}
    .back{color:var(--ui-muted,#667085);text-decoration:none;font-size:14px}
    .back:hover{color:var(--ui-text,#172033)}
    .hero{margin-bottom:22px;background:transparent!important;border:none!important;box-shadow:none!important;padding:0!important}
    h1{margin:20px 0 8px;font-size:30px;letter-spacing:-.03em}
    .lead{margin:0;color:var(--ui-muted,#667085);line-height:1.85;max-width:820px}
    .card{
      background:var(--ui-card,#fff);
      border:1px solid var(--ui-border,#d9deea);
      border-radius:22px;
      box-shadow:0 16px 40px rgba(15,23,42,.06);
    }
    .grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
    .panel{padding:24px}
    label{display:block;margin:0 0 8px;color:var(--ui-muted,#667085);font-size:14px}
    input,select,textarea{
      width:100%;
      border:1px solid var(--ui-border,#d9deea);
      border-radius:14px;
      background:var(--ui-card,#fff);
      color:var(--ui-text,#172033);
      padding:12px 13px;
      font:inherit;
      outline:none;
    }
    textarea{min-height:190px;resize:vertical;line-height:1.7}
    input:focus,select:focus,textarea:focus{border-color:#818cf8;box-shadow:0 0 0 4px rgba(129,140,248,.16)}
    .row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    button{
      border:0;
      border-radius:14px;
      padding:11px 15px;
      background:#4f46e5;
      color:#fff;
      cursor:pointer;
      font:inherit;
      font-weight:700;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:6px;
    }
    button.secondary{background:var(--ui-ghost,#eef2ff);color:var(--ui-text,#172033);border:1px solid var(--ui-border,#d9deea);font-weight:600}
    button:disabled{opacity:.6;cursor:not-allowed}
    .muted{color:var(--ui-muted,#667085);font-size:13px;line-height:1.7}
    .result{
      margin-top:14px;
      padding:14px;
      border-radius:16px;
      background:var(--ui-ghost,#eef2ff);
      border:1px solid var(--ui-border,#d9deea);
      color:var(--ui-text,#172033);
      line-height:1.7;
      min-height:54px;
    }
    .ok{color:#16a34a}
    .bad{color:#dc2626}
    footer{
      margin-top:38px;
      padding-top:22px;
      border-top:1px solid var(--ui-border,#d9deea);
      color:var(--ui-muted,#667085);
      font-size:13px;
      line-height:1.8;
      text-align:center;
    }
    footer a{color:inherit;text-decoration:none}
    @media(max-width:760px){
      .grid,.row{grid-template-columns:1fr}
      .panel{padding:18px}
    }

    .result-box{
      min-height:260px;
      white-space:pre-wrap;
      word-break:break-word;
      font-family:var(--ui-font-mono, ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Noto Sans Mono CJK SC", "Noto Sans Mono", monospace);
    }
    .option-line{display:flex;align-items:center;gap:8px;margin-top:12px;color:var(--ui-muted,#667085);font-size:14px}
    .option-line input{width:auto}