/* Reset a základní styly */
           * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }
        
        body {
            background-color: #121212;
            color: #e0e0e0;
            line-height: 1.6;
            min-height: 100vh;
        }
        
        /* Header styly */
        header {
            background-color: #000000;
            color: #ffffff;
            padding: 2rem;
            text-align: center;
            border-bottom: 1px solid #333;
            position: relative;
        }
        
        header h1 {
            font-size: 2.5rem;
            letter-spacing: 1px;
        }
        
        /* Navigace */
        nav {
            background-color: #1a1a1a;
            padding: 1rem 0;
            border-bottom: 1px solid #333;
            position: relative;
        }
        
        .nav-container {
            display: flex;
            justify-content: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin: 0 1.5rem;
        }
        
        .nav-links a {
            color: #ffffff;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            transition: color 0.3s;
            text-transform: uppercase;
            letter-spacing: 1px;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        
        .nav-links a:hover {
            color: #4CAF50;
            background-color: rgba(76, 175, 80, 0.1);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            position: absolute;
            right: 2rem;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            z-index: 100;
        }
        
        .mobile-menu-btn .material-icons {
            font-size: 2rem;
        }
        
        /* Mobile menu */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.95);
            z-index: 99;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }
        
        .mobile-nav.active {
            display: flex;
        }
        
        .mobile-nav ul {
            list-style: none;
            text-align: center;
        }
        
        .mobile-nav li {
            margin: 2rem 0;
        }
        
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-size: 1.5rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: color 0.3s;
        }
        
        .mobile-nav a:hover {
            color: #4CAF50;
        }
        
        .close-btn {
            position: absolute;
            top: 2rem;
            right: 2rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        
        .close-btn .material-icons {
            font-size: 2.5rem;
        }
    /* Header styles */
    .header-container {
        width: 100%;
        height: 160px;
        overflow: hidden;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: #000;
    }

    .header-image {
        width: 100%;
        height: auto;
        min-height: 200px;
        object-fit: cover;
        object-position: center;
    }

    .logout{
        transition: color 0.3s;
        }
    .logout:hover{
        color: #FF4C4C!important;
        background-color: rgba(255, 76, 76, 0.1)!important;
    }
            /* Navbar active link styling */
            .nav-links a.active {
            color: #4CAF50 !important;
            background-color: rgba(76, 175, 80, 0.1) !important;
        }

        /* Mobile nav active link styling */
        .mobile-nav a.active {
            color: #4CAF50 !important;
        }

                /* Footer */
                footer {
                    background-color: #000000;
                    color: #777;
                    text-align: center;
                    padding: 2rem;
                    margin-top: 2rem;
                    border-top: 1px solid #333;
                }
    /* Responsive adjustments */
@media (max-width: 900px) {
    .header-container {
        height: 120px; /* Reduced from 150px */
    }
    .header-image {
        min-height: 120px; /* Reduced from 150px */
    }
}

@media (max-width: 600px) {
    .header-container {
        height: 100px; /* Reduced from 120px */
    }
    .header-image {
        min-height: 100px; /* Reduced from 120px */
    }
}

@media (max-width: 400px) {
    .header-container {
        height: 80px; /* Reduced from 100px */
    }
    .header-image {
        min-height: 80px; /* Reduced from 100px */
    }
}

@media (max-width: 1200px) {
    header {
        padding: 1.5rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
}