:root{
    --cool-gray: rgb(243, 243, 243);
    --dark-blue: #0f3c70;
    --nadpis: rgb(234, 245, 254);
    --dark-gray: rgb(54, 55, 58);
    --dark: rgb(15, 18, 27);
}
body{
    margin: 0 auto;
    overflow-x: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 1440px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;

}
main {
    flex: 1;

}

header{
    display: grid;
    grid-template-columns: auto auto;
    background-color: white;
    opacity: 0.93;    
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
#logo{
    background-color: white;
}
header a img {
    width: 400px;
    height: auto;
    float: left;
    margin-left: 90px;

}
header nav{
    background-color: var(--dark-blue);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}
header nav a {
    display: inline-block;
    text-align: center;
    padding: 15px 15px;
    padding-left: 15px;
    padding-right: 15px;
    font-size: 20px;
    text-decoration:none;
    font-weight: 600;
    color: white;
}

header nav a:hover {
    transform: scale(1.08);
    transition: transform 0.3s ease;
    background-color:#174a84;
    cursor: pointer;
}
main p, h4{
    margin-left: 50px;
    margin-right: 50px;
}
.gray_background{
    background-color: var(--cool-gray);
    padding: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

#copyright {
    bottom: 0;
    width: 100%;
    background-color: var(--dark-blue);
    padding: 1px;
    text-align: center;

    color: rgb(255, 255, 255);
}
footer{
    margin-top: 30px;
}

#uvod-img img{
    width: 900px;
    display: block; 
    margin: auto;
}

#uvod-text{
    text-align: center;
    margin: 30px 60px 30px 60px;
    background-color: var(--cool-gray);
    padding: 15px;
}
#dum{
    max-width: 1000px;
    margin: auto;
    display: block;
    margin-top: 20px;
}

#Loxone-img img{
    width: 75vw;
    height: auto;
    display: block; 
    margin: auto;
}

.nadpis-energie{
    text-align: center;
    font-size: 40px;

}
.alarmy_systemy-blok {
    display: grid;
    grid-template-columns: 1fr 4fr;
    margin: 10px 0;
    align-items: center;
}
.alarmy_systemy-blok img {
    max-width: 170px;
    height: auto;
    padding-left: 60px;

}
.alarmy_systemy-blok.reverse {
    grid-template-columns: 4fr 1fr;
}
#systemyimg {
    max-width: 400px;
    padding-right: 40px;
}
#Kamery img{
    float: right;
    width: 200px;
    margin-left: 20px;
    margin-right: 60px;
}
#Kamery{
    overflow: hidden;
}
#Kamery-img {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 20px 0;
}
#Kamery-img img{
    width: 70vw;
    display: block; 
    margin: auto;
    margin-top: 20px;
}


.kontakty-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin: 30px 0px;
    text-align: center;
}

.kontakt {
    flex: 1 1 300px;
    max-width: 400px;
    background-color: var(--cool-gray);
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.kontakt h3 {
    margin-bottom: 10px;
    color: var(--dark);
    }

.kontakt p {
    margin: 5px 0;
}

.kontakt a {
    color: var(--primary-color);
    text-decoration: none;
}
.kontakt a:hover {
    color: rgb(129, 129, 129);
    transition:0.2s ease;
}
hr{
    margin-top: 40px;
}
#FVE_sirka {
    display: grid;
    grid-template-columns: auto auto;
    gap: 15px;
    justify-content: center;
    margin: auto;
    margin: 20px;
}

#FVE_sirka img {
    max-width: 600px;
    height: auto;
}
#FVE_vyska {
    display: grid;
    grid-template-columns: auto auto auto;
    gap: 15px;
    justify-content: center;
    margin: auto;
    margin: 20px;
}

#FVE_vyska img {
    max-width: 400px;
    height: auto;
}
.fve{
    background-position: bottom;
    background-image: linear-gradient(rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.6)), url(images/IMG-20250502-WA0006.jpg);
}
#Loxone_vyska {
    display: grid;
    grid-template-columns: auto auto;
    gap: 15px;
    justify-content: center;
    margin: 20px auto;
}

#Loxone_vyska img {
    max-width: 400px;
    height: auto;
}
#Loxone_sirka {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 15px;
    justify-content: center;
    margin: 20px auto;
}

#Loxone_sirka img {
    max-width: 420px;
    height: auto;
}
iframe{
    width: 900px;
    margin: auto;
    display: block;
    padding: 20px;
}

@media screen and (max-width: 1024px) {
    header {
        flex-direction: column;
        align-items: center;
        position: relative;
    }

    header a img {
        width: 200px;
        padding: 10px;
        margin: 0;
    }

    header nav {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding: 15px 0;
        width: 100%;
        -webkit-overflow-scrolling: touch;
        scroll-behavior: smooth;
    }

    header nav a {
        font-size: 18px;
        padding: 10px 15px;
        white-space: nowrap;
        flex: 0 0 auto;
    }

    #burger-toggle {
        display: block;
    }
    
    main p, h4 {
        margin-left: 20px;
        margin-right: 20px;
    }
    
    #uvod-text {
        margin: 20px;
    }
    #uvod-img img{
        width: 100vw;
        height: auto;
        display: block; 
        margin: auto;
    }

    
    .nadpis-energie {
        font-size: 30px;
    }
    
    #Loxone img {
        max-width: 95%;
    }
    
    #Loxone-img img {
        width: 95vw;
    }
    
    .alarmy_systemy-blok,
    .alarmy_systemy-blok.reverse {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .alarmy_systemy-blok img {
        padding-left: 0;
        margin: 0 auto;
        display: block;
    }
    
    #systemyimg {
        max-width: 95%;
        padding-right: 0;
        margin: 0 auto;
    }
    
    #Kamery img {
        float: none;
        width: 150px;
        margin: 10px auto;
        display: block;
    }
    
    #Kamery-img img {
        width: 95vw;
    }
    
    #FVE_sirka, #FVE_vyska, #Loxone_vyska, #Loxone_sirka {
        grid-template-columns: 1fr;
    }
    
    #FVE_sirka img, #FVE_vyska img, #Loxone_vyska img, #Loxone_sirka img {
        max-width: 95%;
        margin: 0 auto;
    }
    iframe {
        width: 95%;
        max-width: 600px;
        height: 350px;
        padding: 10px;
    }
    
    #dum {
        max-width: 95%;
    }
}

@media screen and (max-width: 768px) {  
    header nav {
        padding: 10px 0;
    }

    header nav a {
        font-size: 16px;
        padding: 8px 12px;
    }
    main p, h4 {
        margin-left: 15px;
        margin-right: 15px;
    }
    
    .gray_background {
        padding: 10px;
    }
    
    .nadpis-energie {
        font-size: 26px;
    }
    
    .kontakt {
        flex: 1 1 100%;
    }
    #FVE_sirka img, #FVE_vyska img, #Loxone_vyska img, #Loxone_sirka img {
        max-width: 100%;
    }

    header nav a {
        font-size: 15px;
        padding: 8px 10px;
    }
}