* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100%;
}

body {
    background: #111;
    font-family: Arial, sans-serif;
}

.flipbook-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.flipbook-page:fullscreen,
.flipbook-page:-webkit-full-screen,
.flipbook-page:-moz-full-screen,
.flipbook-page:-ms-fullscreen {
    width: 100%;
    height: 100%;
    min-height: 0;
    background: #111;
}

.flipbook-page:fullscreen .flipbook-container,
.flipbook-page:-webkit-full-screen .flipbook-container,
.flipbook-page:-moz-full-screen .flipbook-container,
.flipbook-page:-ms-fullscreen .flipbook-container {
    min-height: 0;
}

.flipbook-header {
    width: 100%;
    padding: 14px 20px;
    text-align: center;
    background: #1b1b1b;
    color: #fff;
}

.brand {
    font-size: 13px;
    letter-spacing: 2px;
    opacity: 0.75;
}

.book-title {
    margin-top: 4px;
    font-size: 18px;
}

.flipbook-container {
    width: 100%;
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 15px;
}

.book {
    margin: auto;
}

.flipbook-controls {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: #1b1b1b;
}

.flipbook-controls button {
    border: 0;
    border-radius: 4px;
    padding: 9px 16px;
    cursor: pointer;
    font-size: 14px;
}

.page-counter {
    color: #fff;
    min-width: 70px;
    text-align: center;
}

.flipbook-footer {
    width: 100%;
    padding: 8px;
    text-align: center;
    color: #aaa;
    background: #111;
    font-size: 12px;
}

@media (max-width: 600px) {

    .flipbook-header {
        padding: 10px;
    }

    .book-title {
        font-size: 15px;
    }

    .flipbook-container {
        padding: 5px;
    }

    .flipbook-controls {
        padding: 8px;
    }

    .flipbook-controls button {
        padding: 8px 12px;
        font-size: 13px;
    }

    .flipbook-footer {
        display: none;
    }

}