body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
}
.header {
    background-color: #3b5998;
    height: 82px;
    padding: 0 20px;
}
.header-content {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 100%;
}
.logo {
    color: white;
    font-size: 40px;
    font-weight: bold;
    text-decoration: none;
}
.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 82px);
}
.login-box {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    overflow-y:auto;
}
.login-box h2 {
    margin: 0 0 20px 0;
    color: #1c1e21;
    font-size: 20px;
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #1c1e21;
    font-weight: bold;
}
.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #dddfe2;
    border-radius: 6px;
    font-size: 16px;
    box-sizing: border-box;
}
.form-group input:focus {
    outline: none;
    border-color: #1877f2;
    box-shadow: 0 0 0 2px #e7f3ff;
}
.login-button {
    width: 100%;
    padding: 12px;
    background-color: #1877f2;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
}
.login-button:hover {
    background-color: #166fe5;
}
.divider {
    border-top: 1px solid #dadde1;
    margin: 20px 0;
}
.create-account {
    margin-top: 10px;
    width: 100%;
    padding: 12px;
    background-color: #36a420;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
}
.create-account:hover {
    background-color: #36a420;
}
.error-message {
    color: #ff4d4f;
    margin-bottom: 15px;
    padding: 10px;
    background-color: #fff2f0;
    border: 1px solid #ffccc7;
    border-radius: 6px;
}
.helptext {
    display: none;
}
.errorlist {
    color: #ff4d4f;
    list-style: none;
    padding: 0;
    margin: 0 0 15px 0;
}
.errorlist li {
    padding: 10px;
    background-color: #fff2f0;
    border: 1px solid #ffccc7;
    border-radius: 6px;
    margin-bottom: 5px;
}