* {
    /* reset CSS */
    margin: 0;
    padding: 0;
    box-sizing: border-box; /*mantém as medidas através da borda nos elementos*/
}

: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);
}

.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);
}

body {
    /*
    background-image: url(../Assets/bg-mobile.jpg); // adiciona a imagem na página.
    background-repeat: no-repeat; // para a imagem não repetir.
    background-position: top center; // centralizar eixo X e colocar eixo Y no topo.
    background-size: cover; // cobrir/preencher toda a área visivel.
    OBS: existe a opção de "contain;" que cobre o espaço definido do body.
    */

    /*Tudo em um só cód = background: color image repeat position/size */
    background: var(--bg-url) no-repeat top center/cover;
    height: 100vh;
}

body * {
    /* // <uniquifier>: Use a unique and descriptive class name
    // <weight>: Use a value from 100 to 900 */
    font-family: "Inter", sans-serif;
    color: var(--text-color);
}

#container {
    width: 100%;
    max-width: 588px;
    padding: 0 24px;
    margin: 56px auto 0px; /*cima, laterais e baixo*/
}

/*switch*/

#switch {
    width: 64px;
    position: relative;
    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;
    z-index: 1;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    animation: slide-out 0.3s;
    transition: outline 0.2s;
}

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

.light #switch button {
    animation: slide-in 0.4s forwards; /*forwards mantém as propriedades de to{...} em keyframes*/
}

#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;
}

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

#profile img {
    width: 112px;
    transition: opacity 0.1s ease-in-out;
    transition: all 0.5s;
}

#profile img:hover {
    filter: grayscale(100%);
}

#profile p {
    font-weight: 500;
    line-height: 24px;
    margin-top: 8px;
    transition: text-shadow 0.7s;
}

#profile p:hover {
    text-shadow: 0 0 13px blueviolet;
}

/*links*/

ul {
    padding: 24px 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

ul li a {
    display: flex;
    justify-content: center; /*alinha horizontalmente*/
    align-items: center; /*alinha verticalmente, liberado apenas quando se usa flexbox*/
    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: background 0.3s, box-shadow 0.7s;
}

ul li a:hover {
    background: var(--surface-color-hover);
    border: 1.5px solid var(--text-color);
    box-shadow: 0 0 25px blueviolet;
}

#social-links {
    padding: 24px 0px;
    display: flex;
    justify-content: center;
    font-size: 24px;
}

#social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    border-radius: 50%;
    transition: background 0.3s;
}

#social-links a:hover {
    background: var(--highlight-color);
}

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

footer a {
    transition: 0.6s;
}

footer a:hover {
    color: blueviolet;
    text-shadow: 0 0 10px #a70fc6;
}

/*media queries*/

@media (min-width: 700px) {
    :root {
        --bg-url: url(../Assets/bg-desktop.jpg);
    }

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

/*animation*/

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

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