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

:root {
    --text-color: white;
    --bg-url: url("assets/bg-mobile.jpg");
    --stroke-color: rgba(255, 255, 255, 0.5);
    --surface-color: rgba(255, 255, 255, 0.05);
    --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);
    --switch-music-on-url: url(./assets/music-on.svg);
    --switch-music-off-url: url(./assets/music-off.svg);
}

.light {
    --text-color: black;
    --bg-url: url("assets/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);
    --highlight-color: rgba(0, 0, 0, 0.1);
    --switch-bg-url: url(./assets/sun.svg);

    *::-webkit-scrollbar {
        width: 12px;
    }

    *::-webkit-scrollbar-track {
        background-color: #c0c3cc;
    }

    *::-webkit-scrollbar-thumb {
        background-color: #918caec3;
        border-radius: 10px;
        border: 1px solid var(--surface-color);
    }
}

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

body {
    /* 
    background-image: url("assets/bg-mobile.jpg");
    background-repeat: no-repeat;
    background-position: top center;
    background-size: cover; 
    */

    /* background: color image  reapeat position/size */
    background: var(--bg-url) no-repeat top center/cover;
    height: 100vh;
    overflow-y: hidden;
}

#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 - botão light/dark */
#switch,
#switchMusic {
    position: relative;
    width: 64px;

    margin: 4px auto;
}

#switchMusic {
    position: absolute;
    right: 18px;
    top: 18px

}

#switch button,
#switchMusic button {
    width: 32px;
    height: 32px;
    border: 0;
    border-radius: 50%;

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

    /* animation: slide-back 0.2s; */
}

#switch button {
    animation: slide-back 0.2s;
}


#switch button {
    background: white var(--switch-bg-url) no-repeat center;
}

button {
    background: white var(--switch-music-off-url) no-repeat center;
    animation: slide-back 0.2s;
}

.light #switch button {
    animation: slide-in 0.2s forwards;
    /* forwards mantém a propriedade final (do 'to') do keyframe slide-in, sem voltar pro inicio*/
}

button.button-slide {
    background: white var(--switch-music-on-url) no-repeat center;
    animation: slide-in 0.2s forwards;
}

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

#switch span,
#switchMusic 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-type: none;

    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 24px 0;
}

ul li a {
    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);
    -webkit-backdrop-filter: blur(4px);

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

    /* transition: all 0.5s; */
    transition: background 0.2s;
}

ul li a:hover {
    background: var(--surface-color-hover);
    border: 1px solid var(--text-color);
}

.icon {
    font-size: 24px;
    margin-right: 5px;
}

#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-color: var(--highlight-color);
}

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

/* media queries */
@media (min-width: 700px) {
    body {
        height: 120vh;
    }

    :root {
        --bg-url: url(./assets/bg-desktop.jpg);
    }

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

@media (max-height: 728px) {
    body {
        overflow-y: auto;
    }
}

/* animation */
@keyframes slide-in {
    from {
        left: 0;
    }

    to {
        left: 50%;
    }
}

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

    to {
        left: 0;
    }
}