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

:root {
    --text-color: white; 
    --bg-url: url(assets/rock-dark.svg);
    --stroke-color: rgba(255, 255, 255, 0.5);
    --surface-color:rgba(255, 255, 255, 0.5);
    --surface-color-hover: rgba(0, 0, 0, 0.02);
    --highlight-color: rgba(255, 255, 255, 0.2);
    --switch-bg-url: url(./assets/moon-stars.svg);



}

html.light {
    --text-color: black;
    --bg-url: url(assets/rock-light.svg);
    --stroke-color: rgba(0, 0, 0, 0.5);
    --surface-color:rgba(0, 0, 0, 0.5);
    --surface-color-hover: rgba(0, 0, 0, 0.02);
    --highlight-color: rgba(0, 0, 0, 0.1);
    --switch-bg-url: url(./assets/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 auto;
    padding: 0 24px;
    
}

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

#profile img {
    width: 180px;
    
}

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

/* switch */

#switch {
    border: solid none;
    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;
    top: 50%;
    z-index: 1;
    left: 0;
    transform: translateY(-50%);
    animation: slide-back 0.4s;

}

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

}   


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



#switch span {
    display: block;
    width: 54px;
    height: 24px;
    background: var(--surface-color);
    border: 1px solid var(--stroke-color);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 9999px; 




}


/* links (ul vai trabalhar com elementos da caixa 
de forma flexível*/

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

    padding: 24px 0;

}

ul li a {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 52px;
    padding: 16px 24px;

    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--stroke-color);
    border-radius: 8px;

    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);

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

    transition: background 0.2s ;

}

/* pseudo-selector */

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: 50px 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 {
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
}

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

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