:root { color-scheme: light; }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #f4f5f7;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #1f2430;
  }
  .card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 16px;
    padding: 40px 36px;
    box-shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 8px 24px rgba(16, 24, 40, 0.08);
    text-align: center;
  }
  .icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef1ff;
    color: #4a5cf6;
    font-size: 24px;
  }
  h1 {
    font-size: 19px;
    font-weight: 600;
    margin: 0 0 8px;
  }
  p {
    font-size: 14px;
    line-height: 1.5;
    color: #5b6272;
    margin: 0 0 24px;
  }
  form { display: flex; flex-direction: column; gap: 12px; }
  input[type="email"] {
    width: 100%;
    padding: 12px 14px;
    font-size: 14px;
    border: 1px solid #d8dbe3;
    border-radius: 10px;
    outline: none;
    transition: border-color 0.15s ease;
  }
  input[type="email"]:focus { border-color: #4a5cf6; }
  button {
    width: 100%;
    padding: 12px 14px;
    font-size: 14px;
    font-weight: 600;
    color: #ffffff;
    background: #2b2f3a;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.15s ease;
  }
  button:hover { background: #1f222b; }
  .signin {
    display: block;
    padding: 12px 14px;
    border-radius: 10px;
    background: #2b2f3a;
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
  }
  .signin:hover { background: #1f222b; }
  .success .icon { background: #e8f7ee; color: #1ea672; }