@import url('https://fonts.googleapis.com/css2?family=Merriweather:wght@300;400;700;900&family=Roboto+Mono:wght@300;400;500;700&display=swap');

:root {
    --bg-color: #f4f4f9;
    --box-color: #ffffff;
    --text-color: #333;
    --accent-color: #e63946;
    --border-radius: 12px;
    --primary-color: #2a9d8f;
    --secondary-color: #264653;
    --overlay-bg: rgba(255, 255, 255, 0.98);
    --font-family: 'Courier New', Courier, monospace;
    --font-weight: 400;
}

@font-face {
    font-family: 'OpenDyslexic';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/opendyslexic/files/opendyslexic-latin-400-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/opendyslexic/files/opendyslexic-latin-400-normal.woff') format('woff');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'OpenDyslexic';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/opendyslexic/files/opendyslexic-latin-700-normal.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/opendyslexic/files/opendyslexic-latin-700-normal.woff') format('woff');
    font-weight: bold;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'OpenDyslexic';
    src: url('https://cdn.jsdelivr.net/npm/@fontsource/opendyslexic/files/opendyslexic-latin-400-italic.woff2') format('woff2'),
         url('https://cdn.jsdelivr.net/npm/@fontsource/opendyslexic/files/opendyslexic-latin-400-italic.woff') format('woff');
    font-weight: normal;
    font-style: italic;
    font-display: swap;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color); color: var(--text-color);
    display: flex; flex-direction: column; align-items: center;
    padding: 1rem; margin: 0; min-height: 100vh;
}

h1 { margin-bottom: 1rem; font-size: 1.5rem; text-align: center; margin-top: 1.5rem; }

.version-link {
    position: absolute; top: 1rem; right: 1rem;
    font-size: 0.8rem; color: var(--primary-color);
    text-decoration: none; border-bottom: 1px dashed;
}

textarea {
    width: 100%; height: 120px; padding: 15px;
    border: 1px solid #ddd; border-radius: var(--border-radius);
    font-size: 1rem; resize: vertical; box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

button {
    cursor: pointer; transition: transform 0.1s, filter 0.2s;
    border: none; border-radius: 8px; font-weight: 600; color: white;
}
button:hover { filter: brightness(95%); }
button:active { transform: scale(0.96); }

#reader-display {
    width: 100%; max-width: 800px; height: 220px;
    background-color: var(--box-color); border-top: 4px solid var(--primary-color);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12); border-radius: var(--border-radius);
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden; outline: none;
}

#reader-display:fullscreen {
    width: 100vw; height: 100vh; max-width: none; border: none; border-radius: 0; background: #fff;
}

#reader-display::before, #reader-display::after {
    content: ''; position: absolute; width: 2px; height: 18px; background-color: #ddd;
    left: 50%; transform: translateX(-50%); z-index: 1;
}
#reader-display::before { top: 12px; }
#reader-display::after { bottom: 12px; }
#reader-display:fullscreen::before { top: 0; height: 30px; opacity: 0.5; }
#reader-display:fullscreen::after { bottom: 0; height: 30px; opacity: 0.5; }

.word-container {
    font-family: var(--font-family);
    font-size: 2.5rem;
    font-weight: var(--font-weight);
    color: #444;
    white-space: pre; 
    display: flex; 
    flex-direction: row; 
    align-items: baseline;
    justify-content: center;
    width: 100%; 
    z-index: 2; 
    line-height: 1;
    -webkit-font-smoothing: antialiased; 
    -moz-osx-font-smoothing: grayscale;
}

#reader-display:fullscreen .word-container { font-size: clamp(2.5rem, 10vw, 5rem); }

.part-left, .part-right, .pivot {
    font-weight: inherit !important; 
}

.part-left { flex: 1; text-align: right; }
.part-right { flex: 1; text-align: left; }
.pivot { color: var(--accent-color); flex: 0 0 auto; }
.paragraph-symbol { color: #e0e0e0; font-weight: normal; font-size: 0.8em; }

.word-container.is-bold { 
    font-weight: bold;
    color: #000;
    transform: scale(1.05);
}

.word-container.is-italic { 
    font-style: italic; 
}

.word-container.is-h1 { 
    font-size: 3rem;
    font-weight: bold;
}

.word-container.is-h2 { 
    font-size: 2.8rem;
    font-weight: bold;
}

.word-container.is-h3 { 
    font-size: 2.6rem;
    font-weight: bold;
}

#reader-display:fullscreen .word-container.is-h1 { 
    font-size: clamp(3rem, 11vw, 6rem); 
}

#reader-display:fullscreen .word-container.is-h2 { 
    font-size: clamp(2.8rem, 10vw, 5rem); 
}

#reader-display:fullscreen .word-container.is-h3 { 
    font-size: clamp(2.6rem, 9vw, 4rem); 
}

#toast {
    position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
    background-color: rgba(0,0,0,0.8); color: white; padding: 10px 20px;
    border-radius: 30px; font-size: 1.2rem; opacity: 0; transition: opacity 0.2s;
    pointer-events: none; z-index: 30; white-space: nowrap; font-weight: bold;
}
#toast.show { opacity: 1; }

#context-overlay {
    background-color: var(--overlay-bg); z-index: 50; padding: 3rem 1.5rem;
    box-sizing: border-box; overflow-y: auto; display: none;
    font-size: 1.2rem; line-height: 1.6; color: #444; text-align: justify;
}
#context-overlay.active { display: block; }

.ctx-word { padding: 4px 2px; border-radius: 4px; display: inline-block; cursor: pointer; }
.ctx-word:hover { background-color: #ddd; color: #000; }
.ctx-word.current { background-color: var(--primary-color); color: white; font-weight: bold; }
.ctx-break { display: block; margin-top: 1.5rem; }

#context-overlay h1, #context-overlay h2, #context-overlay h3 { color: var(--secondary-color); margin-top: 1.5em; }
#context-overlay p { margin-bottom: 1em; }
#context-overlay ul, #context-overlay ol { margin-left: 1.5em; margin-bottom: 1em; }
#context-overlay blockquote { border-left: 4px solid var(--primary-color); padding-left: 1em; color: #666; font-style: italic; }
#context-overlay code { background: #eee; padding: 2px 5px; border-radius: 4px; font-family: monospace; }

.close-ctx-btn {
    position: fixed; top: 1rem; right: 1rem; padding: 8px 15px;
    background: var(--text-color); color: white; border-radius: 20px; z-index: 51; font-size: 0.9rem;
    cursor: pointer;
}

.controls-info { font-size: 0.85rem; color: #666; margin-top: 15px; text-align: center; }

.mode-tabs {
    display: flex;
    width: 100%;
    margin-bottom: 10px;
    border-bottom: 2px solid #ddd;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    background: transparent;
    color: #666;
    border: none;
    border-radius: 10px 10px 0 0;
    font-weight: bold;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: rgba(0,0,0,0.02);
}

.tab-btn.active {
    background: white;
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
}

.tab-content {
    display: none;
    width: 100%;
}

.tab-content.active {
    display: block;
}

.small-btn {
    padding: 5px 10px;
    font-size: 0.8rem;
    background-color: var(--secondary-color);
}

.file-upload-container {
    background: white;
    padding: 15px;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px dashed #ddd;
}

select {
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.repo-footer {
    margin-top: 3rem;
    margin-bottom: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: #888;
}

.repo-footer a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.repo-footer a:hover {
    text-decoration: underline;
}

.settings-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5); z-index: 100;
    display: none; align-items: center; justify-content: center;
    backdrop-filter: blur(2px);
}
.settings-overlay.active { display: flex; }

.settings-card {
    background: white; padding: 25px; width: 90%; max-width: 400px;
    border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    animation: slideUp 0.2s ease-out;
}

.settings-header {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
    min-height: 40px;
}

.settings-header h2 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--secondary-color);
    text-align: center;
    width: 100%;
    padding-right: 40px; 
    padding-left: 40px;
}

.setting-item { margin-bottom: 15px; }
.setting-item label { display: block; margin-bottom: 8px; font-weight: bold; font-size: 0.9rem; color: #555; }
.setting-item select {
    width: 100%; padding: 10px; border-radius: 8px; border: 1px solid #ccc;
    font-size: 1rem; background: #fff;
}

.close-settings-btn {
    position: absolute;
    right: 0;
    top: 0;
    
    flex: none !important; 
    width: 40px !important; 
    height: 40px !important;
    
    background: transparent;
    color: #666;
    font-size: 1.8rem;
    line-height: 1;
    border: none;
    padding: 0;
    
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.settings-btn {
    background: #6c757d; 
    padding: 8px 12px;
}

@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.library-list-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #eee;
    border-radius: 8px;
    margin-bottom: 20px;
}

.library-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid #f0f0f0;
    background: #fff;
    transition: background 0.2s;
}

.library-item:last-child { border-bottom: none; }
.library-item:hover { background: #f9f9f9; }

.lib-info { flex: 1; padding-right: 10px; text-align: left; }
.lib-title { font-weight: bold; font-size: 1rem; color: #333; margin: 0; }
.lib-author { font-size: 0.85rem; color: #777; margin: 2px 0 0; }
.lib-meta { font-size: 0.75rem; color: var(--primary-color); margin-top: 4px; }

.lib-actions { display: flex; gap: 8px; }

.btn-lib-open {
    padding: 6px 12px;
    font-size: 0.85rem;
    background-color: var(--primary-color);
    border-radius: 4px;
}

.btn-lib-del {
    padding: 6px 10px;
    font-size: 0.85rem;
    background-color: transparent;
    color: #e76f51;
    border: 1px solid #e76f51;
    border-radius: 4px;
}
.btn-lib-del:hover { background-color: #ffebe6; }

.empty-lib-msg {
    padding: 30px;
    text-align: center;
    color: #999;
    font-style: italic;
}

body.dark-mode {
    --bg-color: #121212;
    --box-color: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #ff6b6b; /* Rojo más brillante para el pivote */
    --primary-color: #4db6ac; /* Teal más claro */
    --secondary-color: #a8dadc; /* Texto secundario más claro */
    --overlay-bg: rgba(18, 18, 18, 0.98);
}

body.dark-mode textarea,
body.dark-mode select,
body.dark-mode input[type="number"] {
    background-color: #2d2d2d;
    color: #fff;
    border: 1px solid #444;
}

body.dark-mode .word-container {
    color: #e0e0e0;
}

body.dark-mode .word-container.is-bold {
    color: #fff;
}

body.dark-mode .settings-header {
    border-bottom: 1px solid #333;
}

body.dark-mode .library-item {
    background-color: #252525;
    border-bottom: 1px solid #333;
}
body.dark-mode .library-item:hover {
    background-color: #2d2d2d;
}
body.dark-mode .lib-title {
    color: #fff;
}

body.dark-mode .tab-btn.active {
    background-color: var(--box-color);
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
}
body.dark-mode .tab-btn {
    color: #888;
}
body.dark-mode .tab-btn:hover {
    background-color: rgba(255,255,255,0.05);
}

body.dark-mode .controls-container,
body.dark-mode .settings-card,
body.dark-mode .controls-card {
    background-color: var(--box-color);
    color: var(--text-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

body.dark-mode #resume-card {
    background-color: #252525 !important;
    border: 1px solid #333;
    color: var(--text-color);
}
body.dark-mode #resume-card p {
    color: #aaa !important;
}

body.dark-mode .file-upload-container {
    background-color: var(--box-color);
    border-color: #444;
    color: var(--text-color);
}

body.dark-mode #epub-controls {
    background-color: #1a1a1a !important;
    border-top: 1px solid #333;
    color: var(--text-color);
}

body.dark-mode #reader-display {
    background-color: var(--box-color);
    border-top: 4px solid var(--primary-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.6);
}

body.dark-mode .wpm-stepper {
    background-color: #2d2d2d;
    color: #fff;
}
body.dark-mode .wpm-btn {
    background-color: #444;
    color: #fff;
}


body.dark-mode .mode-tabs {
    border-bottom-color: #333; 
}

body.dark-mode #reader-display {
    border-top-color: #1a4d45;
}

body.dark-mode .settings-card > div[style*="border-top"] {
    border-top-color: #333 !important;
}

body.dark-mode .wpm-btn, 
body.dark-mode .small-btn {
    color: #e0e0e0;
}

#progress-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    
    min-width: 120px;
    height: 60px;
    
    display: flex;
    align-items: flex-end;
    padding-left: 15px;
    padding-bottom: 10px;
    box-sizing: border-box;

    font-size: 0.8rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-weight: 600;
    color: #888;
    cursor: pointer;
    z-index: 15;
    user-select: none;
    -webkit-user-select: none;
    
    opacity: 0.6;
    transition: opacity 0.2s;
}

#progress-indicator:hover {
    opacity: 1;
}

body.dark-mode #progress-indicator {
    color: #888; 
}