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

    
    --header-text-color: #615B50;
    --header-background-color: #EEEBE6;

    --header-button-color: #817A70;
    --header-button-background-color: #E5E1DA;



    --border-color: #A6A095;


    --main-background-color: #E5E1DA;


    --book-title-text-color: #E0DCD5;
    --book-title-background-color: #41569b;

    --book-author-text-color: #F1EFEC;
    --book-author-background-color: #868689;

    --book-status-text-color: #4B453A;
    --book-status-background-color: #f5f1ea;

    --book-textarea-text-color: #4B453A;
    --book-textarea-background-color: #E5E1DA;

    --book-button-text-color: #4B453A;
    --book-button-background-color: #E5E1DA;

    /*
    --header-text-color: #70695F;
    --header-background-color: #FFFFFF;

    --header-button-color: #817A70;
    --header-button-background-color: #FFFBF4;


    --border-color: #A6A095;


    --main-background-color: #FFFBF4;


    --book-title-text-color: #FFFFFF;
    --book-title-background-color: #F18E85;

    --book-author-text-color: #FFFFFF;
    --book-author-background-color: #FFAEA6;

    --book-status-text-color: #655F54;
    --book-status-background-color: #FFFBF4;

    --book-textarea-text-color: #655F54;
    --book-textarea-background-color: #FFFFFF;

    --book-button-text-color: #655F54;
    --book-button-background-color: #FFFBF4;
    */
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.container {
    display: flex;
    height: 100vh;
    background-color: var(--main-background-color);
}

.header {
    color: var(--header-text-color);
    background-color: var(--header-background-color);
    border-right: 1px solid var(--border-color);
    padding: 2rem;
}

.header-block {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
}

.github-icon {
    font-size: 1.4rem;
    color: var(--book-title-background-color);
    transition: 0.2s ease;
}

.github-icon:hover {
    color: var(--book-author-background-color);
}

.header-title {
    font-weight: 300;
    font-size: clamp(calc(1rem + 0.5vw), calc(2rem + 0.5vw), calc(3rem + 0.5vw));
}

.header-btn {
    margin-top: 1rem;
    width: 100%;
    height: 3rem;
    color: var(--header-button-color);
    background-color: var(--header-button-background-color);
    border: 1px solid var(--border-color);
    transition: 0.2s ease;
}

.header-btn:hover {
    cursor: pointer;
    transform: scale(1.05);
}

.new-book {
    color: var(--book-title-background-color);
}

.clear-all {
    color: rgb(235, 72, 123);
}

.buttons {
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.header-btn {
    font-size: 1rem;
}

/* books */
.booklist {
    display: flex;
    flex-wrap: wrap;
    padding: 1rem;
    overflow: auto;
    width: 100%;
    height: 100vh;
    background-color: var(--main-background-color);
}

.book {
    display: flex;
    flex-direction: column;
    margin: 1rem;
    width: 24rem;
    height: 24rem;
    background-color: #fff;
    border: 1px solid var(--border-color);
    overflow: auto;
    transition: 0.2s ease;
    user-select: none;
    -webkit-user-select: none;
}

.book:hover {
    transform: scale(1.02);
}

.book-placeholder {
    margin: 1rem;
    width: 24rem;
    height: 24rem;
    background-color: var(--header-background-color);
}

.book-title {
    padding: 0.5rem;
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--book-title-text-color);
    background-color: var(--book-title-background-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 1.2rem;
    padding: 0.5rem;
    color: var(--book-author-text-color);
    background-color: var(--book-author-background-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-status {
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
}

.book-pages,
.book-status {
    font-size: 1rem;
    padding: 0.5rem;
    color: var(--book-status-text-color);
    background-color: var(--book-status-background-color);
}

.book textarea {
    font-size: 1rem;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    padding: 0.5rem;
    border: none;
    flex-grow: 1;
    resize: none;
    margin-top: auto;
    color: var(--book-textarea-text-color);
    background-color: #fff;
    cursor: default;

}

.book button {
    color: var(--book-button-text-color);
    background-color: var(--book-button-background-color);
    border-left: none;
    border-right: none;
    border-bottom: none;
    border-top: 1px solid var(--border-color);
}

.button-container {
    display: flex;
    flex-direction: row;
}

.button-container button {
    flex: 1;
    padding: 0.5rem;
    background-color: var(--book-status-background-color);
    font-size: 1rem;
}

.button-container button:hover {
    cursor: pointer;
}

.button-container button:nth-child(2) {
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

/* modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.modal-overlay.show {
    visibility: visible;
    opacity: 1;
}

.modal {
    position: relative;
    transition: 0.2s ease;
    z-index: 2;
}

.modal-header {
    display: flex;
    justify-content: space-between;
}

.modal-header > h2 {
    color: var(--book-title-background-color);
    padding-bottom: 0.4rem;
}

.close-btn {
    cursor: pointer;
    font-size: 1.4rem;
}

.modal-content {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    padding: 1rem;
    width: 20rem;
    background-color: var(--book-status-background-color);
}

#book-form {
    display: flex;
    flex-direction: column;
}

label {
    color: var(--header-text-color);
}

input {
    margin-top: 0.4rem;
    margin-bottom: 0.4rem;
    padding: 0.5rem;
}

#status {
    margin-top: 0.4rem;
    margin-bottom: 0.4rem;
    padding: 0.5rem;
}

#notes {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 1rem;
    resize: none;
    overflow: auto;
    height: 10rem;
    padding: 0.4rem;
    margin-top: 0.4rem;
}

#book-form > button {
    background-color: var(--book-title-background-color);
    color: var(--book-author-text-color);
    border: 1px solid var(--border-color);
    padding: 1rem;
    font-size: 1rem;
    cursor: pointer;
}

@media (max-width: 560px) {
    .container {
        display: flex;
        flex-direction: column;
    }

    .header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .header-title {
        border-right: 1px solid var(--border-color);
        padding-right: 0.6rem;
    }

    .buttons {
        display: flex;
        border: none;
        gap: 1rem;
        width: 10rem;
        margin-top: 0;
    }

    .header-btn {
        font-size: 0.8rem;
    }

    .book {
        height: 22rem;
    }
}