/* navigation */

nav.main-menu {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 200;
    font-size: 1rem;
    text-transform: uppercase;
    padding: 1em;
}


nav.main-menu ul {
    display: none;
    list-style-type: none;
    line-height: 1.8;
    margin-top: 0em;
    padding: 1em;
    background-color: rgba(255, 255, 255, 0.96);
    text-shadow: 0px 0px 7px rgba(255, 255, 255, 1);
    border-radius: 1em;
    border: 2px solid var(--light-green);
    box-shadow: 0 0 5px var(--light-green);
    max-height: calc(100vh - 5em);
    overflow-y: auto;
}

nav.main-menu label {
    font-size: 2.5em;
    text-shadow: 3px 3px 4px rgba(255, 255, 255, 0.8);
    cursor: pointer;
}

nav.main-menu input {
    position: absolute;
    cursor: pointer;
    top: -100px;
    left: -100px;
}

nav.main-menu li.livre a {
    display: block;
    height: 170px;
    width: 100%;
    background-repeat: no-repeat;
    background-image: url(../images/ada-300.png);
    background-position: center 2.3em;
    background-size: 64%;
    transition: all 1s;
}

nav.main-menu input[type=checkbox]:checked~ul {
    display: block;
}

nav.main-menu a {
    text-decoration: none;
    color: black;
}

nav.main-menu a:hover {
    text-decoration: none;
/*     font-weight: 600; */
}


/* language selector */

.custom-select {
    min-width: 100%;
    position: relative;
    margin: 0 0 0.8rem;
  }
  
.custom-select select {
    appearance: none;
    width: 100%;
    font-size: 1rem;
    padding: 0.6em 2em 0.6em 1em;
    background-color: var(--yellow3);
    border: 2px solid var(--green);
    border-radius: 0.25rem;
    color: var(--dark-green);
    cursor: pointer;
}

.custom-select::before,
.custom-select::after {
    --size: 0.3rem;
    content: "";
    position: absolute;
    right: 1rem;
    pointer-events: none;
}

.custom-select::before {
    border-left: var(--size) solid transparent;
    border-right: var(--size) solid transparent;
    border-bottom: var(--size) solid var(--dark-green);
    top: 50%;
    transform: translateY(20%);
    
}

.custom-select::after {
    border-left: var(--size) solid transparent;
    border-right: var(--size) solid transparent;
    border-top: var(--size) solid var(--dark-green);
    top: 50%;
    transform: translateY(-120%);
}




/* hint */

.hint {
    position: absolute;
    width: 100vw;
    bottom: 2rem;
    left: 0;
    z-index: 200;
    font-size: 3rem;
    text-align: center;
    animation: 2s ease-out 1s forwards sun-rise;
    text-shadow: 5px 5px 7px rgba(0,0,0,0.3);
    opacity: 0;
}

@keyframes sun-rise {
    from {
        /* pushes the sun down past the viewport */
        transform: translateY(0%);
        opacity: 1;
    }

    to {
        /* returns the sun to its default position */
        transform: translateY(150%);
        opacity: 0;
    }
}
@keyframes to-left {
    from {
        /* pushes the sun down past the viewport */
        transform: translateX(0%);
        opacity: 1;
    }

    to {
        /* returns the sun to its default position */
        transform: translateX(-150%);
        opacity: 0;
    }
}
@keyframes to-right {
    from {
        /* pushes the sun down past the viewport */
        transform: translateX(0%);
        opacity: 1;
    }

    to {
        /* returns the sun to its default position */
        transform: translateX(150%);
        opacity: 0;
    }
}



/* Footer */


footer {
    padding: 3vw 10vw;
    font-size: 0.9rem;
    line-height: 1.5em;
}
footer ul {
    list-style-type: none;
    columns: 2;
}

footer a {
    text-decoration: none;
}
footer a:hover {
    text-decoration: underline;
}