html, body {
    height: 100%;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

div, td, input, textarea, button {
    box-sizing: border-box;
    position: relative;
}

.login-container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

h2 {
    color: #1d3557;
    text-align: center;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #1d3557;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.button {
    background-color: #457b9d;
    color: white;
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
}

.button:hover {
    background-color: #1d3557;
}

.input-error {
    border: 2px solid #e63946 !important;
    background-color: #ffe5e5;
}

.info-box {
    background-color: #e0f3ff;
    border-left: 4px solid #2196f3;
    padding: 12px;
    color: #0a3d62;
    border-radius: 5px;
    font-size: 14px;
    margin-top: 15px;
}

.ip-display {
    font-size: 12px;
    color: #666;
    text-align: center;
    margin-top: 20px;
}