* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #3d5aa3 0%, #2c3e7a 50%, #1b2551 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 900px;
    max-width: 90vw;
    display: flex;
    min-height: 500px;
}

.login-left {
    background-color: #1b2551;
    color: white;
    padding: 60px 40px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.login-left::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M12 2L2 7v10c0 5.55 3.84 10 9 10s9-4.45 9-10V7l-10-5z"/></svg>') no-repeat center;
    background-size: contain;
}

.company-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;
    text-align: center;
}

.company-tagline {
    font-size: 16px;
    color: #a8b3d9;
    margin-bottom: 50px;
    text-align: center;
}

.features {
    list-style: none;
    max-width: 250px;
    margin: 0 auto;
}

.features li {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    font-size: 16px;
}

.features li::before {
    content: '✓';
    color: #4CAF50;
    font-weight: bold;
    margin-right: 15px;
    font-size: 18px;
}

.login-right {
    padding: 60px 40px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-title {
    font-size: 28px;
    color: #333;
    margin-bottom: 40px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #666;
    font-weight: 500;
    font-size: 14px;
}

.form-group label::before {
    content: '👤';
    margin-right: 8px;
}

.form-group:nth-child(3) label::before {
    content: '🔒';
}

.form-control {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    background-color: #f8f9fa;
}

.form-control:focus {
    outline: none;
    border-color: #1b2551;
    background-color: white;
}

.login-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #1b2551 0%, #2c3e7a 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 10px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(27, 37, 81, 0.4);
}

.login-btn::before {
    content: '→';
    margin-right: 8px;
}

.copyright {
    text-align: center;
    margin-top: 30px;
    color: #999;
    font-size: 12px;
}

.error-message {
    background-color: #fee;
    color: #c33;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid #c33;
}

@media (max-width: 768px) {
    .login-container {
        flex-direction: column;
        width: 95vw;
    }
    
    .login-left {
        padding: 40px 30px;
    }
    
    .login-left::before {
        display: none;
    }
    
    .login-right {
        padding: 40px 30px;
    }
    
    .company-logo,
    .company-tagline {
        text-align: center;
    }
}