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

body {
    font-family: "Bai Jamjuree", sans-serif;
    text-align: center;
}

:root {
    --Dark-Grayish-Blue: hsl(210, 10%, 33%);
    --Grayish-Blue: hsl(201, 11%, 66%);
    --Strong-Cyan: hsl(171, 66%, 44%);
    --Light-Blue: hsl(233, 100%, 69%);
}

header {
    background-image: url(images/bg-header-desktop.png);
    background-repeat: no-repeat;
    background-size: cover;
    padding-bottom: 20px;
}

header img{
    margin-top: 80px;
}


h2, h3, h1{
    opacity: .6;
}

p {
    font-size: 15px;
    opacity: .5;
    margin: 20px 0 45px;
}

.buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.ios-button {
    background-color: var(--Strong-Cyan);
    color: white;
    width: 200px;
    padding: 1rem;
    border-radius: 4rem;
    -webkit-border-radius: 4rem;
    -moz-border-radius: 4rem;
    -ms-border-radius: 4rem;
    -o-border-radius: 4rem;
    box-shadow: 0 4px 9px -3px var(--Strong-Cyan);

}

.mac-button {
    background-color: var(--Light-Blue);
    color: white;
    width: 200px;
    padding: 1rem;
    border-radius: 4rem;
    -webkit-border-radius: 4rem;
    -moz-border-radius: 4rem;
    -ms-border-radius: 4rem;
    -o-border-radius: 4rem;
    box-shadow: 0 4px 9px -3px var(--Light-Blue);
}

.mac-button:hover,.ios-button {
    cursor: pointer;
}

section {
    margin-top: 8rem;
}

.co-container {
    margin-top: 90px;
    display: flex;
    flex-wrap: wrap;
}

.co-container .left {
    margin-left: 60px;
    text-align: left;
}

.mac-img {
    margin-left: -50px;
}

.co-container p {
    width: 330px;
}

.mac-img img {
    width: 600px;
}

.device-sec {
    margin-top: 100px;
}

.container-top {
    margin-top: 50px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: space-evenly;
    width: 100%;
}

.container-top .items {
    max-width:  330px;
}

.svg-container {
    display: flex;
    flex-wrap: wrap;
    gap: 45px;
    justify-content: space-evenly;
    margin-bottom: 50px;
}

.footer {
    margin-top: 50px;
    background-color: #eee;
    padding: 20px;
}

.footer-container {
    text-align: left;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1.5fr;
}

ul {
    list-style: none;
    line-height: 1.5;
}

a {
    text-decoration: none;
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--Dark-Grayish-Blue);
}

.social ul{
    display: flex;
    align-items: center;
    gap: 2rem;
}

a:hover {
    transition: .3s;
    color: var(--Strong-Cyan);
    -webkit-transition: .3s;
    -moz-transition: .3s;
    -ms-transition: .3s;
    -o-transition: .3s;
}

a img:hover {
    transition: .3s;
    filter: brightness(0)  saturate(100%) invert(61%) sepia(38%)  saturate(760%)hue-rotate(122deg) brightness(93%) contrast(90%);
    -webkit-filter: brightness(0)  saturate(100%) invert(61%) sepia(38%)  saturate(760%)hue-rotate(122deg) brightness(93%) contrast(90%);
}

@media (max-width:992px) {
    .mac-img img {
        width: 500px;
    }
    .mac-img {
        margin: 0;
    }
    .mob-mac-img img {
        width: 700px;
    }
}

@media (max-width:905px) {
    .mac-img  {
        margin: auto;
    }
    .co-container {
        flex-direction: column;
    }
    .co-container .left {
        margin: 20px auto;
        text-align: center;
    }
    .mob-mac-img img {
        width: 500px;
    }
    .footer-container {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
    .social {
        margin-top: 20px;
        grid-column-start: 2;
        grid-row-start: 2;
    }
}

@media (max-width:605px) {
    header {
        background-image: url(./images/bg-header-mobile.png);
    }
    .mac-img img {
        width: 350px;
    }
    .mob-mac-img img {
        width: 350px;
    }
    .footer-container {
        display: flex;
        flex-direction: column;
        text-align: center;
    } 
    .footer-container li {
        margin-top: 20px;
    }
    .social {
        margin: 20px auto;
    }
}

@media (max-width:375px) {
    header h1 {
        font-size: 22px;
    }
    header p {
        font-size: 18px;
    }
    .mac-img img {
        width: 300px;
    }
    section {
        padding: 15px;
    }
    .mob-mac-img img {
        width: 300px;
    }
    .svg-container {
        flex-direction: column;
    }
}