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

:root {
    --text-color: white;
    --bg-url: url(./img/bg-mobile.jpg);
    --stroke-color: rgba(255, 255, 255, 0.5);
    --surface-color: rgba(255, 255, 255, 0.1);
    --surface-color-hover: rgba(0, 0, 0, 0.02);
    --highlight-color: (0, 0, 0, 0.1);
    --switch-bg-url: url(./moon-stars.svg);
}

.light {
    --text-color: black;
    --bg-url: url(./img/bg-mobile-light.jpg);
    --stroke-color: rgba(0, 0, 0, 0.5);
    --surface-color: rgba(0, 0, 0, 0.05);
    --surface-color-hover: rgba(0, 0, 0, 0.02);
    --switch-bg-url: url(./sun.svg)
}

body {
   background-image: var(--bg-url);
   background-repeat: no-repeat;
   background-position: top center;
   background-size: cover;
   
   height: 100vh;
}

body * {
    font-family: "Inter", sans-serif;
    color: var(--text-color);

}


#container {
    width: 100%;
    max-width: 588px;
    margin: 56px auto 0px;
    padding: 0 24px;
}



/* profile */

#profile {
    text-align: center;
    padding: 24px;
}

#profile img {
    width: 112px;
}

#profile p {
    font-weight: 500;
    line-height: 24px;
    margin-top: 8px;
}



/* switch */
    #switch {
        position: relative;
        width: 64px;
        margin: 4px auto;
    }

    #switch button {
        width: 32px;
        height: 32px;
        background: white var(--switch-bg-url) no-repeat center;
        border: 0;
        border-radius: 50%;

        position: absolute;
        left: 0;
        top: 50%;
        z-index: 1;
        transform: translateY(-50%);

        transition: left 0.2s;

        cursor: pointer;

        animation: slide-out 0.4s;
    }

    .light #switch button {
        animation: slide-in 0.4s forwards;
    }

    #switch button:hover {
        outline: 8px solid var(--highlight-color);
    }

    #switch span {
        display: block;
        width: 64px;
        height: 24px;
        background: var(--surface-color);
        border: 1px solid var(--stroke-color);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        border-radius: 9999px;
    }




/* links*/

ul {
    list-style: none;
    
    display: flex;
    flex-direction: column;
    gap: 16px;

    padding: 24px 0;
}

ul li a {
    border: 1px solid red;

    display: flex;
    align-items: center;
    justify-content: center;
    
    padding: 16px 24px;

    background: var(--surface-color);
    border: 1px solid var(--stroke-color);
    border-radius: 8px;

    backdrop-filter: blur(4px);

    text-decoration: none;
    font-weight: 500;

    transition: background 0.2s;
}

ul li a:hover {
    background: var(--surface-color-hover);
    border: 1.5px solid var(--text-color)

}



/* social-links*/

#social-links {
    display: flex;
    justify-content: center;

    padding: 24px 0;

    font-size: 24px;
}

#social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;

    transition: background 0.2s;
    border-radius: 50%;
}

#social-links a:hover {
    background: var(--highlight-color);
    padding: 16px;
   

}


/*footer*/

footer{
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
}



/* media queries */
@media (min-width: 700px) {
    :root {
        --bg-url: url(./img/bg-desktop.jpg)
    }

    .light {
        --bg-url: url(./img/bg-desktop-light.jpg)
    }
}



/* animation */

@keyframes slide-in {
    from {
        left: 0;
    } 
    to {
        left: 50%;
    } 
}

@keyframes slide-out {
    from {
        left: 50%;
    }
    to {
        left: 0;
    }
}