body {
      font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
      margin: 0;
      background: #f6f7f9;
      display: grid;
      place-items: center;
      min-height: 100vh;
    }
    .card {
      width: min(420px, 92vw);
      background: white;
      border-radius: 14px;
      padding: 24px;
      box-shadow: 0 6px 18px rgba(0,0,0,.06);
    }
    h1 { margin-top: 0; font-size: 24px; }
    .row { margin-bottom: 14px; }
    .muted { color: #6b7280; font-size: 14px; margin-bottom: 6px; }
    input {
      width: 100%;
      padding: 10px;
      border-radius: 10px;
      border: 1px solid #e5e7eb;
      box-sizing: border-box;
    }
    button {
      width: 100%;
      padding: 12px;
      border: none;
      border-radius: 12px;
      background: #14b8c6;
      color: white;
      font-weight: 700;
      cursor: pointer;
    }
    .error {
      color: #dc2626;
      margin-bottom: 12px;
      font-size: 14px;
    }
    a {
      color: #0f766e;
      text-decoration: none;
    }