@import url('https://fonts.googleapis.com/css2?family=Literata:ital,opsz,wght@0,7..72,200..900;1,7..72,200..900&display=swap');

:root {
    --bg: #dbd7ca;
    --text: #25211e;
    --heading: #2a2623;
    --subheading: #22201f;
    --bookmark: #852736;
    --chapter: #446474;
    --border: #c4bcac;
    --selection-bg: rgb(255, 253, 143);
    --selection-text: #0f0904;
    --control-bg: rgba(0, 0, 0, 0.05);
    --control-hover: rgba(0, 0, 0, 0.1);
    --control-text: #5c5550;
}

[data-theme="dark"] {
    --bg: #1c1b18;
    --text: #cdc8be;
    --heading: #e8e4dc;
    --subheading: #fff;
    --bookmark: #cf2c48;
    --chapter: #7ab7c2;
    --border: #3a3630;
    --selection-bg: #2cd1c9;
    --selection-text: #000000;
    --control-bg: rgba(255, 255, 255, 0.08);
    --control-hover: rgba(255, 255, 255, 0.15);
    --control-text: #9a958c;
}

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

html {
    font-size: 20px;
    overflow: hidden;
    height: 100%;
}

html[data-size="small"] { font-size: 17px; }
html[data-size="medium"] { font-size: 20px; }
html[data-size="large"] { font-size: 24px; }

body {
    
    font-family: "Literata", Charter, 'Bitstream Charter', 'Sitka Text', Cambria, Georgia, serif;
    font-optical-sizing: auto;
    line-height: 1.8;
    max-width: 55ch;
    margin: 0 auto;
    padding: 3rem 1.5rem 2rem;
    background: var(--bg);
    color: var(--text);
    font-weight: 400;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
    overflow: hidden;
    height: 100vh;
}

/* Top bar */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
    background: var(--bg);
}

.top-bar-left {
    flex: 1;
}

.top-bar-center {
    text-align: center;
    cursor: pointer;
    line-height: 1.4;
}

.top-bar-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--subheading);
    letter-spacing: 0.02em;
    transition: opacity 0.3s ease;
}

.top-bar-chapter {
    font-size: 14px;
    color: var(--control-text);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.top-bar-chapter.visible {
    opacity: 1;
}

/* Page indicator */
.page-indicator {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 20px;
    color: var(--subheading);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.page-indicator.visible {
    opacity: 1;
}

/* Controls */
.controls {
    flex: 1;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.control-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--control-bg);
    color: var(--control-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: background 0.2s ease, transform 0.2s ease;
    backdrop-filter: blur(10px);
}

.control-btn:hover {
    background: var(--control-hover);
    transform: scale(1.05);
}

.font-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--control-bg);
    border-radius: 24px;
    padding: 4px;
    backdrop-filter: blur(10px);
}

.font-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--control-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: background 0.2s ease;
}

.font-btn:hover {
    background: var(--control-hover);
}

.font-btn.small { font-size: 12px; }
.font-btn.large { font-size: 18px; }

main {
    position: relative;
    min-height: 60vh;
}

/* Page container */
.page-container {
    position: relative;
    height: calc(100vh - 64px - 3rem - 20px);
    display: flex;
    flex-direction: column;
    justify-content: start;
    opacity: 1;
    transition: opacity 0.15s ease-in-out;
    padding-top: 4rem;
}
.home h1 {
    color: var(--chapter);
}
.home p {
    text-indent: 0;
}

.page-container.page-transition {
    opacity: 0;
}

.page-container.title-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 64px - 3rem - 2rem - 2rem);
}
.page-container.home {
    padding-bottom: 50%;
}

.page-container.read.title-page h1 {
    padding-bottom: 50%;
}

/* Click zones */
.click-zone {
    position: fixed;
    top: 0;
    bottom: 0;
    width: 22ch;
    cursor: pointer;
    z-index: 50;
}

.click-zone.left {
    left: 0;
    cursor: w-resize;
}

.click-zone.right {
    right: 0;
    cursor: e-resize;
}

h1 {
    font-size: 3rem;
    line-height: 1.4;
    font-weight: 600;
    margin-bottom: 0;
    text-align: center;
    letter-spacing: -0.02em;
    color: var(--heading);
}

article {
    margin-bottom: 3rem;
}

article:last-child {
    margin-bottom: 0;
}

h2 {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--subheading);
    padding-bottom: 0.5rem;
    text-align: center;
}

.chapter-number {
    font-size: .85rem;
    font-weight: 400;
    margin: 0 auto 12px;

    display: flex;
    justify-content: center;
    align-items: center;
    width: 48px;
    height: 48px;
    color: var(--bg);
    background-color: var(--chapter);
    border-radius: 100px;
}

p {
    margin-bottom: 1.5rem;
    text-align: left;
    word-spacing: 0.05em;
    hyphens: none;
    text-indent: 1em;
}

h2 + p {
    text-indent: 0;
}

p:last-child {
    margin-bottom: 0;
}

/* Paragraph continuation indicator */
.paragraph-continuation {
    text-indent: 0;
}

/* Chapter end flourish */
.chapter-end-flourish {
    text-align: center;
    font-size: 1.5rem;
    color: var(--control-text);
    margin-top: 2rem;
    opacity: 0.6;
}

/* Book end flourish - more elaborate */
.chapter-end-flourish.book-end {
    margin-top: 3rem;
    font-size: 2rem;
    opacity: 0.8;
    color: var(--subheading);
}

.book-end-text {
    font-family: inherit;
    font-size: 1rem;
    font-style: italic;
    margin-top: 1rem;
    opacity: 0.7;
}

::selection {
    background: var(--selection-bg);
    color: var(--selection-text);
}

/* Progress bar */
.progress-bar {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border);
    transform: translateY(-100%);
}

.progress-fill {
    height: 100%;
    background: var(--subheading);
    width: 0%;
    transition: width 0.3s ease;
}

.chapter-marker {
    position: absolute;
    top: -2px;
    width: 1px;
    height: 5px;
    background: var(--text);
    opacity: 0;
    box-shadow: 0 0 0 2px var(--bg);
    transition: opacity 0.3s ease;
}
header:hover .chapter-marker {
    opacity: .4;
}
.bookmark-marker {
    position: absolute;
    top: -20px;
    width: 12px;
    height: 12px;
    transform: translateX(-60%);
    transition: left 0.3s ease, opacity 0.3s ease, transform 0.2s ease;
    opacity: 0;
    cursor: pointer;
    z-index: 1;
}

.bookmark-marker svg {
    position: absolute;
    top: 14px;
    left: 0;
    width: 110%;
    height: 110%;
    background-color: var(--bg);
    fill: var(--bookmark);
    stroke: none;
    border-radius: 3px;
}

.bookmark-marker.visible {
    opacity: 1;
}

.bookmark-marker:hover {
    transform: translateX(-60%) translateY(-40%) scale(1.3);
}

/* Page bookmark button - appears on hover */
.page-bookmark-btn {
    position: absolute;
    top: 2rem;
    right: 0;
    width: 1.5rem;
    height: 1.5rem;
    border: none;
    background: transparent;
    color: var(--subheading);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease, color 0.2s ease, transform 0.2s ease;
    z-index: 60;
}

.page-container:hover .page-bookmark-btn {
    opacity: 0.5;
}

.page-bookmark-btn:hover {
    opacity: 1 !important;
    transform: scale(1.1);
}

.page-container .page-bookmark-btn.active {
    opacity: 1;
    color: var(--bookmark);
}

.page-bookmark-btn svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

.page-bookmark-btn.active svg {
    fill: currentColor;
}

/* Hide bookmark button on title page */
body.page-0 .page-bookmark-btn {
    display: none;
}

/* Hide title on first page */
body.page-0 .top-bar-title {
    opacity: 0;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    html[data-size="small"] { font-size: 16px; }
    html[data-size="medium"] { font-size: 18px; }
    html[data-size="large"] { font-size: 21px; }

    body {
        padding: 2rem 1.25rem 1.5rem;
        line-height: 1.75;
    }

    h1 {
        font-size: 1.75rem;
    }

    .top-bar {
        padding: 0 16px;
        height: 56px;
    }

    .top-bar-title {
        font-size: 12px;
    }

    .page-indicator {
        font-size: 11px;
    }

    .page-bookmark-btn {
        right: -2rem;
        width: 1.5rem;
        height: 1.5rem;
    }

    .page-container {
        height: calc(100vh - 56px - 2rem - 20px);
    }

    .top-bar-chapter {
        font-size: 10px;
    }
}

/* Chapter overlay */
.chapter-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.chapter-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.chapter-overlay-content {
    background: var(--bg);
    border-radius: 12px;
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.chapter-overlay-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--control-bg);
    color: var(--control-text);
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.chapter-overlay-close:hover {
    background: var(--control-hover);
}

.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.chapter-list-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 1rem;
    padding-right: 2rem;
}

.chapter-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text);
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.2s ease;
    cursor: pointer;
}

.chapter-link:hover {
    background: var(--control-bg);
}

.chapter-link-number {
    font-size: 0.85rem;
    color: var(--control-text);
    margin-right: 0.5rem;
}

.chapter-link-title {
    font-weight: 500;
}

/* Upload container */
.upload-container {
    margin-top: 2rem;
    text-align: center;
}

.upload-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--control-bg);
    color: var(--text);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    font-family: inherit;
    transition: background 0.2s ease, transform 0.2s ease;
}

.upload-btn:hover {
    background: var(--control-hover);
    transform: scale(1.02);
}

.upload-hint {
    margin-top: 0.4rem;
    text-align: center;
    font-size: 0.7rem;
    color: var(--control-text);
    text-indent: 0;
}

/* Recent books */
.recent-books {
    margin-top: 3rem;
    text-align: center;
}

.recent-books-heading {
    display: inline;
    font-size: 1rem;
    font-weight: 300;
    color: var(--control-text);
    margin-bottom: 1rem;
}

.recent-books-list {
    list-style: none;
    display: inline;
}

.recent-books-list li {
    margin: 0 0 0 0.5rem;
}

.recent-books-list a {
    color: var(--text);
    text-decoration: none;
}

.recent-books-list a:hover {
    color: var(--heading);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg);
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    width: 80%;
    max-width: 300px;
}

.loading-title {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--heading);
    margin-bottom: 1.5rem;
}

.loading-progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress-fill {
    height: 100%;
    background: var(--chapter);
    width: 0%;
}

.loading-status {
    font-size: 0.85rem;
    color: var(--control-text);
    margin-top: 1rem;
    min-height: 1.2em;
}