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

body {
    font-family: Arial, sans-serif;
    background-image: url(../img/bg-oper.jpg);
    backdrop-filter: grayscale(100%) blur(0px);
    background-position: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.background-overlay {
    background: var(--bg-gradient);
    opacity: 0.8;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.login-container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.login-btn:hover {
    background: #5a6fd8;
}

.error-message {
    background: #ff4757;
    color: white;
    padding: 10px;
    border-radius: 5px;
    margin-top: 15px;
    display: none;
    text-align: center;
}

.success-message {
    background: #2ed573;
    color: white;
    padding: 10px;
    border-radius: 5px;
    margin-top: 15px;
    display: none;
    text-align: center;
}

.test-users {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
    font-size: 14px;
}

.test-users h4 {
    margin-bottom: 10px;
    color: #333;
}

.test-users p {
    margin: 5px 0;
    color: #666;
}

.redirect-info {
    margin-bottom: 20px;
    padding: 10px;
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    border-radius: 5px;
    font-size: 14px;
    color: #1565c0;
}