:root {
       font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
   }

   body {
       margin: 24px;
       max-width: 980px;
   }

   h1 {
       font-size: 20px;
       margin: 0 0 12px;
   }

   .grid {
       display: grid;
       gap: 12px;
       grid-template-columns: 1fr;
   }

   @media (min-width: 900px) {
       .grid {
           grid-template-columns: 1fr 1fr;
       }
   }

   .card {
       border: 1px solid #ddd;
       border-radius: 12px;
       padding: 14px;
   }

   .card h2 {
       color: #b00020;
       font-size: 16px;
       margin: 0 0 10px;
   }

   label {
       display: block;
       font-size: 13px;
       margin: 8px 0 4px;
   }

   input,
   select,
   textarea,
   button {
       width: 100%;
       box-sizing: border-box;
       padding: 10px;
       border-radius: 10px;
       border: 1px solid #ccc;
       font: inherit;
   }

   textarea {
       min-height: 320px;
       resize: vertical;
   }

   .row {
       display: grid;
       gap: 10px;
       grid-template-columns: 1fr;
   }

   @media (min-width: 520px) {
       .row {
           grid-template-columns: 1fr 1fr 1fr;
       }
   }

   .actions {
       display: grid;
       gap: 10px;
       grid-template-columns: 1fr;
   }

   @media (min-width: 520px) {
       .actions {
           grid-template-columns: 1fr 1fr;
       }
   }

   .hint {
       font-size: 12px;
       color: #555;
       margin-top: 6px;
   }

   .ok {
       font-size: 12px;
       color: #0a7a22;
   }

   .err {
       font-size: 12px;
       color: #b00020;
   }