* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f5f6fa;
}

.login-container {
    background-color: white;
    padding: 60px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
}

h2 {
    margin-bottom: 30px;
    color: #2c3e50;
    font-size: 28px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #34495e;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.form-control:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.login-btn {
    background-color: #2c3e50;
    color: white;
    padding: 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
    transition: background-color 0.3s;
    margin-top: 20px;
}

.login-btn:hover {
    background-color: #34495e;
}

.error-message {
    color: #e74c3c;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
}