/* RESET CSS */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* VARIABLES */
:root {
    --dark-color: rgb(2, 4, 8);
    --dark-hover: rgba(255, 255, 255, 0.1);

    --light-color: rgb(245, 245, 245);
    --light-hover: rgba(0, 0, 0, 0.1);
    --halfLife: 0;

}

::-webkit-scrollbar {
    display: none;
}
/* GENERAL */
body {
    width: 100%;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: monospace, sans-serif;
    font-size: 0.5rem;
    transition: background-color 0.3s;
}

.fullscreen {
    position: absolute;
    cursor: pointer;
    right: 25px;
    bottom: 25px;
    width: 30px;
    height: 30px;
    background-image: url("source/Fullscreen\ Ico.png");
}

body.light-mode {
    color: var(--dark-color);
    background-color: var(--light-color)
}

body.light-mode #toggle-mode-btn:hover {
    background-color: var(--light-hover);
}

body.dark-mode {
    color: var(--light-color);
    background-color: var(--dark-color);
}

body.dark-mode #toggle-mode-btn:hover {
    background-color: var(--dark-hover);
}

a {
    text-decoration: none;
    color: var(--dark-color);
}

input {
    display: none;
}

/* MAIN */
#credits {
    position: fixed;
    top: 2rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    font-size: 0.5rem;
    border: none;
    border-radius: 0.5rem;
    background-color: transparent;
    transition: background-color 0.3s;
    cursor: pointer;
}

#return {
    position: fixed;
    top: 2rem;
    left: 1rem;
    display: flex;
    flex-direction: column;
    font-size: 0.5rem;
    border: none;
    border-radius: 0.5rem;
    background-color: transparent;
    transition: background-color 0.4s;
}

#portfolio-link {
    padding-right: 0.5rem;
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    font-size: 0.75rem;
}

#github-link {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
}

/* RESPONSIVE WARNING */
#responsive-warning {
    width: 100%;
    height: 100%;
    padding: 2rem;
    position: fixed;
    top: 0;
    left: 0;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    font-size: 1rem;
    text-align: center;
    z-index: 9999;
}

.warning-icons {
    font-size: 10rem;
}

/* FLIP BOOK */
#flip_book {
    width: 298px;
    height: 420px;
    position: relative;
    transition-duration: 1s;
    perspective: 2000px;
}

.front_cover,
.back_cover {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 2.5px 5px 5px 2.5px;
    background-image: url(./assets/images/flip_book_edge_shading.webp);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    background-color: var(--backGroundColor);
    box-shadow: 0 0 5px 0 rgb(25, 25, 25, 0.25);

}

.front_cover {
    position: absolute;
    cursor: pointer;
    transform-origin: center left;
    background-image: var(--backgroundImage);
    transition: transform 0.5s;
    z-index: 99;
}


.front_cover label {
    width: 100%;
    height: 100%;
    position: absolute;
    cursor: pointer;
}

.page {
    width: 288px;
    height: 400px;
    position: absolute;
    top: 10px;
    left: 1px;
    border-radius: 0 5px 5px 0;
    background-color: white;
    transform-origin: left;
    transform-style: preserve-3d;
    transform: rotateY(0deg);
    transition-duration: 0.35s;
}

p, h1 {
    margin: 20px;
    font-family: Georgia, 'Times New Roman', Times, serif;
}

p {
    font-size: 10px;
}



.front_page {
    width: 100%;
    height: 100%;
    position: absolute;
    backface-visibility: hidden;
}

.front_page label {
    width: 100%;
    height: 100%;
    position: absolute;
    cursor: pointer;
    z-index: 100;
}

.back_page {
    width: 100%;
    height: 100%;
    position: absolute;
    backface-visibility: hidden;
    transform: rotateY(180deg);
    z-index: 100;
}

.back_page label {
    width: 100%;
    height: 100%;
    position: absolute;
    cursor: pointer;
    z-index: 100;
}

.edge_shading {
    width: 288px;
    height: 400px;
    position: absolute;
    z-index: 98;
}

.front_content {
    width: 287px;
    height: 398px;
    position: absolute;
    top: 1px;
    border-radius: 0 5px 5px 0;
    z-index: 97;
}

.back_content {
    width: 287px;
    height: 398px;
    position: absolute;
    top: 1px;
    left: 1px;
    border-radius: 5px 0 0 5px;
    z-index: 97;
}


.back_cover {
    position: relative;
    z-index: -1;
}



#page1 {
    z-index: 10;
}

#page2 {
    z-index: 7;
}

#page3 {
    z-index: 6;
}

#page4 {
    z-index: 5;
}

#page5 {
    z-index: 4;
}

#page6 {
    z-index: 3;
}

#cover_checkbox:checked~#flip_book {
    transform: translateX(144px)
}

#cover_checkbox:checked~#flip_book .front_cover {
    transform: rotateY(-180deg);
    transition: transform 1.5s, z-index 0.75s 0.75s;
    z-index: 3;
}

#cover_checkbox:checked~#flip_book #cover {
    width: 80%;
    height: 80%;
    position: absolute;
}

#page1_checkbox:checked~#flip_book #page1 {
    transform: rotateY(-180deg);
    z-index: 4;
}

#page2_checkbox:checked~#flip_book #page2 {
    transform: rotateY(-180deg);
    z-index: 5;
}

#page3_checkbox:checked~#flip_book #page3 {
    transform: rotateY(-180deg);
    z-index: 6;
}

#page4_checkbox:checked~#flip_book #page4 {
    transform: rotateY(-180deg);
    z-index: 7;
}

#page5_checkbox:checked~#flip_book #page5 {
    transform: rotateY(-180deg);
    z-index: 8;
}

#page6_checkbox:checked~#flip_book #page6 {
    transform: rotateY(-180deg);
    z-index: 9;
}

@media (max-width: 768px) {

    #flip_book {
        width: 150px;
        height: 210px;
        position: relative;
        transition-duration: 1s;
        perspective: 1000px;
    }

    .page {
        width: 140px;
        height: 200px;
        position: absolute;
        top: 10px;
        left: 1px;
        border-radius: 0 5px 5px 0;
        background-color: white;
        transform-origin: left;
        transform-style: preserve-3d;
        transform: rotateY(0deg);
        transition-duration: 0.35s;
    }
    p, h1 {
        margin: 5px;
        font-family: Georgia, 'Times New Roman', Times, serif;
    }

    p {
        font-size: 5px;
    }
    h1 {
        font-size: small;
    }

    .page > div > img {
        height: 100%;
        width: 100%
    }

    .front_content {
        width: 138px;
        height: 198px;
        position: absolute;
        top: 1px;
        margin-bottom: 1px;
        border-radius: 0 5px 5px 0;
        z-index: 97;
    }

    .back_content {
        width: 138px;
        height: 198px;
        position: absolute;
        top: 1px;
        margin-bottom: 1px;
        left: 1px;
        border-radius: 5px 0 0 5px;
        z-index: 97;
    }
    #cover_checkbox:checked~#flip_book {
        transform: translateX(var(--halfLife))
    }

    #responsive-warning.show {
        height: 100px;
        width: 300px;
        display: block;
        position: absolute;
        top: 70%;
        left: 10%;
    }

    #responsive-warning.show > p {
        font-size: large;
    }
    
    @media (max-width: 810px) and (max-height: 400px){
    
      #flip_book {
        width: 150px;
        height: 210px;
        position: relative;
        transition-duration: 1s;
        perspective: 1000px;
    }

    .page {
        width: 140px;
        height: 200px;
        position: absolute;
        top: 10px;
        left: 1px;
        border-radius: 0 5px 5px 0;
        background-color: white;
        transform-origin: left;
        transform-style: preserve-3d;
        transform: rotateY(0deg);
        transition-duration: 0.35s;
    }
    p, h1 {
        margin: 5px;
        font-family: Georgia, 'Times New Roman', Times, serif;
    }

    p {
        font-size: 5px;
    }
    h1 {
        font-size: small;
    }

    .page > div > img {
        height: 100%;
        width: 100%
    }

    .front_content {
        width: 138px;
        height: 198px;
        position: absolute;
        top: 1px;
        margin-bottom: 1px;
        border-radius: 0 5px 5px 0;
        z-index: 97;
    }

    .back_content {
        width: 138px;
        height: 198px;
        position: absolute;
        top: 1px;
        margin-bottom: 1px;
        left: 1px;
        border-radius: 5px 0 0 5px;
        z-index: 97;
    }
    #cover_checkbox:checked~#flip_book {
        transform: translateX(var(--halfLife))
    }

    #responsive-warning.show {
        height: 100px;
        width: 300px;
        display: block;
        position: absolute;
        top: 70%;
        left: 10%;
    }
    
    }
    
    
    
    
}