html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}
body {
    min-height: 100vh;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ecf0f1;
    font-family: 'Segoe UI', Arial, sans-serif;
    transition: background 0.3s;
}
.auth-container {
    width: 320px;
    padding: 30px;
    border: 1px solid #ddd;
    border-radius: 12px;
    background: rgba(255,255,255,0.97);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.18);
    text-align: center;
    position: relative;
}
.auth-container input {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 15px;
}
.auth-container button {
    width: 100%;
    padding: 12px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 17px;
    cursor: pointer;
    margin-top: 10px;
    transition: background 0.2s;
}
.auth-container button:hover {
    background: #0056b3;
}
.auth-container .error {
    color: #b30000;
    margin-bottom: 10px;
    background: #ffeaea;
    border: 1px solid #ffb3b3;
    border-radius: 4px;
    padding: 6px 0;
}
.auth-container label {
    display: flex;
    width: 100%;
    justify-content: start;
}
.auth-container a {
    color: #007bff;
    text-decoration: none;
    transition: color 0.2s;
}
.auth-container a:hover {
    text-decoration: underline;
}