* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background: #edf1f5;
    color: #253648;
    font: 16px/1.5 Arial, sans-serif;
}
.preview-login {
    width: min(100%, 440px);
    padding: 40px;
    border-top: 5px solid #17456d;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 12px 40px #142f4914;
}
.preview-login img { max-width: 100%; height: auto; }
.preview-login-label { margin-top: 28px; font-size: 12px; letter-spacing: 2px; color: #65788a; }
h1 { margin: 0 0 12px; font-size: 28px; }
form { display: grid; gap: 10px; margin-top: 24px; }
label { font-weight: 700; }
input[type="password"], button { width: 100%; min-height: 46px; border-radius: 4px; font: inherit; }
input[type="password"] { padding: 10px 12px; border: 1px solid #aebbc7; }
input:focus-visible, button:focus-visible { outline: 3px solid #7ab9ea; outline-offset: 3px; }
button { margin-top: 8px; padding: 10px 16px; border: 0; background: #17456d; color: #fff; font-weight: 700; cursor: pointer; }
button:hover { background: #103754; }
.preview-login-note { margin: 22px 0 0; color: #65788a; font-size: 13px; }
.preview-login-error { padding: 12px; border-left: 3px solid #b42f34; background: #fff0f0; color: #8b2529; }
@media (max-width: 480px) {
    body { padding: 16px; }
    .preview-login { padding: 28px 22px; }
}