* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    background: #f5f5f5;
    color: #222;
    font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    padding: 40px 16px;
}
.signin {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .05);
    margin: 0 auto;
    max-width: 380px;
    padding: 24px;
}
.signin h2 { font-size: 24px; font-weight: 600; margin: 0 0 16px; }
.signin p { margin: 0 0 14px; }
.signin label { display: block; font-size: 14px; margin-bottom: 4px; }
.signin .field { margin-bottom: 14px; }
.signin input[type="text"], .signin input[type="email"], .signin input[type="password"] {
    border: 1px solid #bbb;
    border-radius: 4px;
    display: block;
    font-size: 16px;
    padding: 10px;
    width: 100%;
}
.signin input.code { font-size: 22px; letter-spacing: 4px; text-align: center; }
.signin .check { align-items: flex-start; display: flex; gap: 8px; margin-bottom: 14px; }
.signin .check input { margin-top: 4px; }
.signin .check label { font-size: 15px; margin: 0; }
.signin .hint { color: #666; font-size: 13px; margin: 4px 0 0; }
.signin button {
    background: #0d6efd;
    border: 0;
    border-radius: 4px;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    margin-bottom: 12px;
    padding: 11px 16px;
    width: 100%;
}
.signin button:disabled { background: #9db9e8; cursor: default; }
.signin button.link, .signin a {
    background: none;
    color: #0d6efd;
    display: inline;
    font-size: 15px;
    margin: 0;
    padding: 0;
    text-decoration: underline;
    width: auto;
}
.signin button.link:disabled { color: #888; text-decoration: none; }
.signin .links { margin-top: 2px; }
.signin .links div { margin-bottom: 8px; }
.signin .bad { color: #b02a37; font-size: 15px; margin: 0 0 14px; }
.signin .ok { color: #146c43; font-size: 15px; margin: 0 0 14px; }
.signin img { max-width: 100%; }