/* ============================================ */
/* PART 1: CSS STYLES (styles.css)              */
/* ============================================ */

:root {
  --bg-primary:#fff;--bg-secondary:#f7f8fa;--bg-tertiary:#eef1f5;--bg-elevated:#fff;
  --text-primary:#1a1d23;--text-secondary:#4a5568;--text-muted:#718096;
  --accent:#5b6cff;--accent-hover:#4a5ae8;--accent-soft:#eef0ff;
  --success:#10b981;--danger:#ef4444;--warning:#f59e0b;
  --border:#e2e8f0;--border-strong:#cbd5e1;
  --shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 12px rgba(0,0,0,.08);--shadow-lg:0 12px 32px rgba(0,0,0,.12);
  --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;
  --transition:.2s ease;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--font-serif:Georgia,"Times New Roman",serif;
}
[data-theme="dark"] {
  --bg-primary:#0f1419;--bg-secondary:#1a1f2e;--bg-tertiary:#242b3d;--bg-elevated:#1e2433;
  --text-primary:#e4e7ec;--text-secondary:#a0aec0;--text-muted:#718096;
  --accent:#7c8cff;--accent-hover:#9ba6ff;--accent-soft:#2a3150;
  --border:#2d3548;--border-strong:#3d4660;
  --shadow-sm:0 1px 2px rgba(0,0,0,.3);--shadow-md:0 4px 12px rgba(0,0,0,.4);--shadow-lg:0 12px 32px rgba(0,0,0,.5);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);background:var(--bg-secondary);color:var(--text-primary);line-height:1.6;min-height:100vh;transition:background var(--transition),color var(--transition);-webkit-font-smoothing:antialiased}
.skip-link{position:absolute;top:-40px;left:0;background:var(--accent);color:#fff;padding:8px 16px;text-decoration:none;border-radius:0 0 var(--radius-sm) 0;z-index:10000;transition:top var(--transition)}
.skip-link:focus{top:0;outline:3px solid var(--accent);outline-offset:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:var(--radius-sm)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.app-container{max-width:1200px;margin:0 auto;padding:24px;min-height:100vh;display:flex;flex-direction:column}
.app-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:24px;flex-wrap:wrap;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand-icon{width:64px;height:64px;object-fit:contain;transition:transform 0.2s ease;transform-origin:center}
.brand-icon:hover{transform:scale(1.12)}
.brand-text h1{font-size:1.25rem;font-weight:700;letter-spacing:-.02em}
.brand-text p{font-size:.8rem;color:var(--text-muted);margin-top:2px}
.header-actions{display:flex;align-items:center;gap:8px}
.theme-toggle,.icon-btn{width:40px;height:40px;border:1px solid var(--border);background:var(--bg-secondary);border-radius:var(--radius-md);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:all var(--transition);color:var(--text-primary);position:relative}
.theme-toggle:hover,.icon-btn:hover{background:var(--bg-tertiary);transform:translateY(-1px)}
.icon-btn[data-tooltip]::after{content:attr(data-tooltip);position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--text-primary);color:var(--bg-primary);padding:6px 10px;border-radius:var(--radius-sm);font-size:.75rem;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity var(--transition);z-index:100}
.icon-btn[data-tooltip]:hover::after{opacity:1}
/* "How to Use" is a labeled icon-btn rather than icon-only, so it needs auto width and inline padding */
.header-actions .icon-btn[data-tooltip="How to Use"]{font-size:16px;font-weight:600;padding:0 12px;width:auto;gap:6px;background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.header-actions .icon-btn[data-tooltip="How to Use"]:hover{background:var(--accent);color:#fff}
.modal iframe.guide-iframe{width:100%;height:70vh;border:none;border-radius:var(--radius-md);background:var(--bg-secondary)}
@media (max-width:600px){.header-actions .icon-btn[data-tooltip="How to Use"]{font-size:14px;padding:0 10px}}
main{flex:1;display:flex;flex-direction:column;gap:24px}
.section-title{font-size:1rem;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px;color:var(--text-primary)}
.upload-section,.genre-section{background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 24px;box-shadow:var(--shadow-sm)}
.upload-zone{border:2px dashed var(--border-strong);border-radius:var(--radius-lg);padding:48px 24px;text-align:center;cursor:pointer;transition:all var(--transition);background:var(--bg-secondary);position:relative}
.upload-zone:hover,.upload-zone.drag-over{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.upload-zone.drag-over{animation:pulse 1s ease infinite}
@keyframes pulse{0%,100%{transform:translateY(-2px)}50%{transform:translateY(-4px)}}
.upload-icon{font-size:48px;margin-bottom:16px;display:block}
.upload-title{font-size:1.25rem;font-weight:600;margin-bottom:8px;color:var(--text-primary)}
.upload-subtitle{color:var(--text-muted);font-size:.9rem}
.upload-input{position:absolute;inset:0;opacity:0;cursor:pointer}
.progress-container{margin-top:20px;display:none}.progress-container.active{display:block}
.progress-bar{height:8px;background:var(--bg-tertiary);border-radius:var(--radius-sm);overflow:hidden;position:relative}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),#8b5cf6);border-radius:var(--radius-sm);width:0%;transition:width .3s ease}
.progress-text{margin-top:8px;font-size:.85rem;color:var(--text-secondary);text-align:center}
.status-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;background:var(--bg-tertiary);border-radius:var(--radius-xl);font-size:.85rem;color:var(--text-secondary);margin-top:16px}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);animation:blink 2s ease infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.5}}
.status-dot.error{background:var(--danger);animation:none}.status-dot.processing{background:var(--warning)}
.genre-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.genre-chip{padding:10px 14px;background:var(--bg-secondary);border:2px solid var(--border);border-radius:var(--radius-md);cursor:pointer;text-align:center;font-size:.9rem;font-weight:500;transition:all var(--transition);position:relative;color:var(--text-primary);font-family:inherit}
.genre-chip:hover{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-2px)}
.genre-chip.selected{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:var(--shadow-md)}
.genre-chip[data-tooltip]::before{content:attr(data-tooltip);position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--text-primary);color:var(--bg-primary);padding:8px 12px;border-radius:var(--radius-sm);font-size:.75rem;white-space:normal;width:max-content;max-width:220px;opacity:0;pointer-events:none;transition:opacity var(--transition);z-index:100;font-weight:400;line-height:1.4}
.genre-chip[data-tooltip]:hover::before{opacity:1}
.action-bar{display:flex;gap:12px;flex-wrap:wrap;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px 24px;box-shadow:var(--shadow-sm);align-items:center}
.btn{padding:10px 20px;border:1px solid var(--border);background:var(--bg-secondary);border-radius:var(--radius-md);cursor:pointer;font-size:.9rem;font-weight:500;display:inline-flex;align-items:center;gap:8px;transition:all var(--transition);color:var(--text-primary);font-family:inherit}
.btn:hover:not(:disabled){background:var(--bg-tertiary);transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover)}
.btn-danger{color:var(--danger)}.btn-danger:hover:not(:disabled){background:#fef2f2;border-color:var(--danger)}
[data-theme="dark"] .btn-danger:hover:not(:disabled){background:rgba(239,68,68,.1)}
.action-spacer{flex:1}
.stats-bar{display:flex;gap:16px;flex-wrap:wrap;font-size:.85rem;color:var(--text-muted);padding:0 8px}
.stat-item{display:flex;align-items:center;gap:6px}
.app-footer{text-align:center;padding:24px;color:var(--text-muted);font-size:.85rem;margin-top:24px}
#pagesContainer{background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow-sm);min-height:400px;position:relative;overflow:hidden}
.placeholder-content{text-align:center;padding:60px 20px;color:var(--text-muted)}
.placeholder-content h3{color:var(--text-primary);margin-bottom:8px}
.chapter-frame{background:var(--bg-elevated);border-radius:var(--radius-md);padding:32px;min-height:300px}
.chapter-content{font-family:var(--font-serif);line-height:1.8;color:var(--text-primary);max-width:720px;margin:0 auto}
.chapter-content h1,.chapter-content h2,.chapter-content h3,.chapter-content h4{color:var(--accent);margin:1.5em 0 .8em;line-height:1.3}
.chapter-content h1{font-size:2em}.chapter-content h2{font-size:1.6em}.chapter-content h3{font-size:1.3em}.chapter-content h4{font-size:1.1em}
.chapter-content p{margin-bottom:1.2em;text-align:justify}
.chapter-content img{max-width:100%;height:auto;border-radius:8px;margin:1em 0;display:block}
.chapter-content a{color:var(--accent);text-decoration:underline}
.chapter-content ul,.chapter-content ol{margin:1em 0 1em 2em}
.chapter-content li{margin-bottom:.5em}
.chapter-content blockquote{border-left:3px solid var(--accent);padding-left:1em;margin:1em 0;font-style:italic;opacity:.9}
.chapter-content h1+p::first-letter,.chapter-content h2+p::first-letter{font-size:4em;float:left;line-height:.8;margin-right:.15em;margin-top:.05em;margin-bottom:-.05em;font-weight:700;color:var(--accent);font-family:var(--font-serif)}
.page-nav{position:absolute;top:50%;transform:translateY(-50%);background:var(--bg-elevated);border:1px solid var(--border);width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-md);transition:all var(--transition);color:var(--text-primary);z-index:10}
.page-nav:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.page-nav.prev{left:-20px}.page-nav.next{right:-20px}
.chapter-indicator{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);background:var(--bg-elevated);border:1px solid var(--border);padding:8px 16px;border-radius:var(--radius-xl);font-size:.85rem;color:var(--text-secondary);box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:4px}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .2s ease}.modal-overlay.active{display:flex}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-width:500px;width:100%;max-height:90vh;overflow-y:auto;animation:slideUp .3s ease}.modal.large{max-width:800px}
@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.modal-title{font-size:1.15rem;font-weight:600;color:var(--text-primary)}
.modal-close{width:32px;height:32px;border:none;background:var(--bg-secondary);border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--text-primary);transition:all var(--transition)}
.modal-close:hover{background:var(--bg-tertiary)}
.modal-body{padding:24px}.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:flex-end}
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:.85rem;font-weight:500;margin-bottom:6px;color:var(--text-secondary)}
.form-input{width:100%;padding:10px 12px;border:1px solid var(--border);background:var(--bg-secondary);border-radius:var(--radius-md);font-size:.9rem;color:var(--text-primary);transition:all var(--transition);font-family:inherit}
.form-input:focus{outline:none;border-color:var(--accent);background:var(--bg-primary);box-shadow:0 0 0 3px var(--accent-soft)}
.form-checkbox{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:.9rem;color:var(--text-primary)}
.form-checkbox input{width:18px;height:18px;cursor:pointer;accent-color:var(--accent)}
.file-input-wrapper{position:relative;display:flex;align-items:center;gap:8px}
.file-input-wrapper input[type="file"]{flex:1;font-size:.85rem;color:var(--text-primary)}
.file-input-wrapper input[type="file"]::file-selector-button{padding:6px 12px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-primary);font-family:inherit;margin-right:8px}
.file-clear-btn{padding:6px 10px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;font-size:14px;color:var(--text-primary);transition:all var(--transition)}
.file-clear-btn:hover{background:var(--danger);color:#fff;border-color:var(--danger)}
.guide-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.guide-item{padding:12px;background:var(--bg-secondary);border-radius:var(--radius-md);border-left:3px solid var(--accent)}
.guide-item strong{display:block;margin-bottom:4px;color:var(--text-primary)}
.guide-item p{font-size:.85rem;color:var(--text-secondary);line-height:1.5}
.preview-frame{width:100%;height:500px;border:1px solid var(--border);border-radius:var(--radius-md);background:#fff}
.toast-container{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 20px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:10px;min-width:280px;animation:slideInRight .3s ease;font-size:.9rem;color:var(--text-primary)}
@keyframes slideInRight{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
.toast.success{border-left:4px solid var(--success)}.toast.error{border-left:4px solid var(--danger)}.toast.warning{border-left:4px solid var(--warning)}.toast.info{border-left:4px solid var(--accent)}
.loading-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:3000;flex-direction:column;gap:16px;color:#fff}.loading-overlay.active{display:flex}
.spinner{width:48px;height:48px;border:4px solid rgba(255,255,255,.2);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:768px){.app-container{padding:12px}.app-header{padding:12px 16px;flex-direction:column;align-items:stretch}.header-actions{justify-content:flex-end}.upload-section,.genre-section,.action-bar{padding:16px}.upload-zone{padding:32px 16px}.upload-icon{font-size:36px}.genre-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:8px}.genre-chip{padding:8px 10px;font-size:.8rem}.action-bar{flex-direction:column;align-items:stretch}.btn{justify-content:center}.action-spacer{display:none}.page-nav.prev{left:8px}.page-nav.next{right:8px}#pagesContainer{padding:20px}.toast-container{left:12px;right:12px;bottom:12px}.toast{min-width:auto}}
@media(max-width:480px){.brand-text h1{font-size:1rem}.brand-text p{font-size:.7rem}.stats-bar{font-size:.75rem;gap:10px}}
@media print{.app-header,.action-bar,.upload-section,.genre-section,.app-footer,.page-nav,.stats-bar,.chapter-indicator{display:none}#pagesContainer{box-shadow:none;border:none;padding:0}}
::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}::selection{background:var(--accent);color:#fff}

/* Shared styles for exported HTML - hamburger, floating nav, image popup, link popup, fullscreen, zoom */
.hamburger-menu{position:fixed;top:20px;left:20px;z-index:9999;display:flex;flex-direction:column;align-items:flex-start}
.hamburger-btn{background:var(--accent);border:none;color:#fff;font-size:2rem;width:56px;height:56px;border-radius:50%;cursor:pointer;box-shadow:0 4px 16px rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;transition:.2s;line-height:1}
.hamburger-btn:hover{background:var(--accent-hover);transform:scale(1.05)}
.hamburger-btn .hamburger-icon{display:flex;flex-direction:column;gap:5px;width:28px}
.hamburger-btn .hamburger-icon span{display:block;height:3px;background:#fff;border-radius:3px;transition:.3s}
.hamburger-dropdown{position:fixed;top:86px;left:20px;background:var(--bg-primary);min-width:260px;max-height:70vh;overflow-y:auto;border-radius:16px;display:none;z-index:9998;border:1px solid var(--border);box-shadow:var(--shadow-lg);padding:8px 0}
.hamburger-dropdown.show-dropdown{display:block}
.hamburger-dropdown .dropdown-item{padding:10px 18px;cursor:pointer;border-bottom:1px solid var(--border);font-size:.9rem;transition:.15s;display:flex;justify-content:space-between;align-items:center;color:var(--text-primary)}
.hamburger-dropdown .dropdown-item:hover{background:var(--bg-tertiary)}
.hamburger-dropdown .dropdown-item.active-chapter{background:var(--accent);color:#fff}
.hamburger-dropdown .dropdown-item:last-child{border-bottom:none}
.hamburger-dropdown .bookmark-star-btn{background:none;border:none;font-size:1.1rem;cursor:pointer;padding:0 4px}
.floating-nav{position:fixed;top:50%;transform:translateY(-50%);z-index:1000;display:flex;gap:12px}
.floating-nav.left{left:20px}.floating-nav.right{right:20px}
.floating-btn{background:var(--accent);color:#fff;border:none;width:52px;height:52px;border-radius:50%;font-size:1.5rem;cursor:pointer;box-shadow:0 6px 16px rgba(0,0,0,.25);display:flex;align-items:center;justify-content:center;transition:background .3s}
.floating-btn:hover:not(:disabled){background:var(--accent-hover)}
.floating-btn:disabled{opacity:.4;cursor:not-allowed}
.image-popup{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.9);display:none;align-items:center;justify-content:center;z-index:10000;cursor:pointer}
.image-popup.active{display:flex}.image-popup img{max-width:90%;max-height:90%;object-fit:contain}
.link-popup-container{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);z-index:99999;display:none;align-items:center;justify-content:center;animation:fadeIn .3s ease}
.link-popup-container.active{display:flex}
.link-popup-frame{width:90%;max-width:1000px;height:85vh;background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.5);overflow:hidden;display:flex;flex-direction:column;position:relative}
.link-popup-header{background:var(--accent);padding:10px 20px;display:flex;justify-content:space-between;align-items:center;flex-shrink:0;border-bottom:1px solid rgba(255,255,255,.2)}
.link-popup-header span{color:#fff;font-size:.85rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:70%;font-weight:500}
.link-popup-header .popup-close-btn{background:rgba(255,255,240,.2);border:1px solid rgba(255,255,255,.3);border-radius:50%;width:36px;height:36px;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s;color:#fff}
.link-popup-header .popup-close-btn:hover{background:var(--danger);border-color:var(--danger)}
.link-popup-header .popup-open-new-btn{background:rgba(255,255,240,.2);border:1px solid rgba(255,255,255,.3);border-radius:40px;padding:4px 14px;cursor:pointer;font-size:.75rem;color:#fff;transition:.2s;margin-left:8px}
.link-popup-header .popup-open-new-btn:hover{background:rgba(255,255,240,.35)}
.link-popup-header .popup-actions{display:flex;align-items:center;gap:8px}
.link-popup-iframe{flex:1;border:none;width:100%;background:#fff}
.link-popup-loading{display:flex;align-items:center;justify-content:center;height:100%;font-size:1.2rem;color:var(--text-secondary);background:var(--bg-secondary)}
.fullscreen-btn{position:fixed;bottom:20px;right:20px;background:var(--accent);color:#fff;border:none;width:48px;height:48px;border-radius:50%;cursor:pointer;z-index:1000;font-size:1.2rem;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(0,0,0,.3);transition:background .3s}
.fullscreen-btn:hover{background:var(--accent-hover)}
.zoom-btn{position:fixed;bottom:20px;right:80px;background:var(--accent);color:#fff;border:none;width:48px;height:48px;border-radius:50%;cursor:pointer;z-index:1000;font-size:1rem;font-weight:700;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(0,0,0,.3);transition:background .3s;user-select:none;-webkit-user-select:none}
.zoom-btn:hover{background:var(--accent-hover)}
.chapter-nav{display:flex;align-items:center;justify-content:center;gap:16px;padding:16px;background:var(--bg-primary);border-top:1px solid var(--border);margin-top:20px}
.chapter-nav button{background:var(--accent);color:#fff;border:none;padding:8px 16px;border-radius:var(--radius-md);cursor:pointer;transition:background .2s}
.chapter-nav button:hover:not(:disabled){background:var(--accent-hover)}
.chapter-nav button:disabled{opacity:.4;cursor:not-allowed}
.chapter-nav .chapter-indicator{font-size:.9rem;color:var(--text-secondary)}
.chapter-divider{margin:2em 0;border:0;border-top:2px solid var(--border)}
.section-divider{display:block;width:100%;height:2px;background:var(--border);margin:0.2em 0 1.5em 0;border:none;opacity:0.8}

/* Genre Theme System */
.style-literary{--genre-accent:#6b5b4a;--genre-header-bg:linear-gradient(145deg,#2d2a24,#4a3f35);--genre-header-text:#f0e8dd;--genre-sub-text:#c8b8a8;--genre-page-bg:#f5f0ea;--genre-content-bg:rgba(255,252,248,.92);--genre-content-text:#2d2822;--genre-h1-color:#4a3f35;--genre-h2-color:#5a4f45;--genre-h3-color:#6a5f55;--genre-drop-color:#4a3f35;--genre-font:Georgia,serif;--genre-decorator:"\\00A7 "}
.style-fantasy{--genre-accent:#b8860b;--genre-header-bg:linear-gradient(145deg,#1e2a1e,#2d3a2d);--genre-header-text:#f5e6c8;--genre-sub-text:#c8b89a;--genre-page-bg:#f4efe6;--genre-content-bg:rgba(255,252,242,.9);--genre-content-text:#2c2418;--genre-h1-color:#4a3728;--genre-h2-color:#5a4030;--genre-h3-color:#6a5040;--genre-drop-color:#4a3728;--genre-font:Georgia,serif;--genre-decorator:"\\2726 "}
.style-scifi{--genre-accent:#00d4ff;--genre-header-bg:linear-gradient(135deg,#0b1a2a,#1a2f3f);--genre-header-text:#b8f0ff;--genre-sub-text:#8ac8e0;--genre-page-bg:#eef5fa;--genre-content-bg:rgba(255,255,255,.92);--genre-content-text:#1a2a3a;--genre-h1-color:#0a3a5a;--genre-h2-color:#0a4a6a;--genre-h3-color:#1a5a7a;--genre-drop-color:#00aadd;--genre-font:'Segoe UI',sans-serif;--genre-decorator:"\\25C8 "}
.style-horror{--genre-accent:#5a2a2a;--genre-header-bg:linear-gradient(145deg,#1a1010,#2a1818);--genre-header-text:#d4b8b8;--genre-sub-text:#8a6a6a;--genre-page-bg:#1e1818;--genre-content-bg:rgba(245,238,235,.95);--genre-content-text:#3a2828;--genre-h1-color:#4a2828;--genre-h2-color:#5a3838;--genre-h3-color:#6a4848;--genre-drop-color:#4a2828;--genre-font:Georgia,serif;--genre-decorator:"\\263E "}
.style-mystery{--genre-accent:#2a4a5a;--genre-header-bg:linear-gradient(145deg,#1a2a3a,#2a4a5a);--genre-header-text:#d4e8f0;--genre-sub-text:#8aa8b8;--genre-page-bg:#f0f4f6;--genre-content-bg:rgba(255,255,255,.92);--genre-content-text:#1a2a3a;--genre-h1-color:#1a3a4a;--genre-h2-color:#2a4a5a;--genre-h3-color:#3a5a6a;--genre-drop-color:#1a3a4a;--genre-font:Georgia,serif;--genre-decorator:"\\25C8 "}
.style-thriller{--genre-accent:#8a2a2a;--genre-header-bg:linear-gradient(135deg,#1a0a0a,#3a1a1a);--genre-header-text:#f0d8d8;--genre-sub-text:#c8a0a0;--genre-page-bg:#f5ece8;--genre-content-bg:rgba(255,252,248,.92);--genre-content-text:#2a1a1a;--genre-h1-color:#5a1a1a;--genre-h2-color:#6a2a2a;--genre-h3-color:#7a3a3a;--genre-drop-color:#5a1a1a;--genre-font:Georgia,serif;--genre-decorator:"\\26A1 "}
.style-romance{--genre-accent:#d48a8a;--genre-header-bg:linear-gradient(135deg,#3a1e2a,#5a2a3a);--genre-header-text:#f5e0e0;--genre-sub-text:#c8a0a0;--genre-page-bg:#fcf5f5;--genre-content-bg:rgba(255,252,250,.9);--genre-content-text:#3a2a2a;--genre-h1-color:#6a3a4a;--genre-h2-color:#7a4a5a;--genre-h3-color:#8a5a6a;--genre-drop-color:#6a3a4a;--genre-font:Georgia,serif;--genre-decorator:"\\2765 "}
.style-historical{--genre-accent:#8a7a5a;--genre-header-bg:linear-gradient(145deg,#2a2418,#4a3a28);--genre-header-text:#f0e8d0;--genre-sub-text:#c8b8a0;--genre-page-bg:#f5efe8;--genre-content-bg:rgba(255,252,245,.92);--genre-content-text:#2a2418;--genre-h1-color:#4a3a28;--genre-h2-color:#5a4a38;--genre-h3-color:#6a5a48;--genre-drop-color:#4a3a28;--genre-font:Georgia,serif;--genre-decorator:"\\231B "}
.style-adventure{--genre-accent:#d4a373;--genre-header-bg:linear-gradient(145deg,#2d2418,#4a3828);--genre-header-text:#f0e0c8;--genre-sub-text:#d4c0a8;--genre-page-bg:#f5ede4;--genre-content-bg:rgba(255,250,242,.9);--genre-content-text:#2a2218;--genre-h1-color:#5a3a2a;--genre-h2-color:#6a4a3a;--genre-h3-color:#7a5a4a;--genre-drop-color:#5a3a2a;--genre-font:Georgia,serif;--genre-decorator:"\\2694 "}
.style-speculative{--genre-accent:#6a4a8a;--genre-header-bg:linear-gradient(135deg,#1a0a2a,#3a1a5a);--genre-header-text:#e8d8f0;--genre-sub-text:#b8a0c8;--genre-page-bg:#f5f0f8;--genre-content-bg:rgba(255,252,250,.92);--genre-content-text:#2a1a3a;--genre-h1-color:#3a1a5a;--genre-h2-color:#4a2a6a;--genre-h3-color:#5a3a7a;--genre-drop-color:#3a1a5a;--genre-font:Georgia,serif;--genre-decorator:"\\2726 "}

/* Apply genre styles — shared ruleset for all genres, driven by the --genre-* custom
   properties each .style-* class defines above. Only genuinely different rules
   (sci-fi's heading borders, horror's drop-cap glow) are layered on as overrides. */
.app-container[class*="style-"] .app-header{background:var(--genre-header-bg);border-color:var(--genre-accent)}
.app-container[class*="style-"] .brand-text h1{color:var(--genre-header-text)}
.app-container[class*="style-"] .brand-text p{color:var(--genre-sub-text)}
.app-container[class*="style-"] #pagesContainer{background:var(--genre-page-bg)}
.app-container[class*="style-"] .chapter-content{background:var(--genre-content-bg);color:var(--genre-content-text);font-family:var(--genre-font);padding:2rem;border-left:3px solid var(--genre-accent);border-right:3px solid var(--genre-accent)}
.app-container[class*="style-"] .chapter-content h1{color:var(--genre-h1-color);border-left:6px solid var(--genre-accent);padding-left:20px}
.app-container[class*="style-"] .chapter-content h2{color:var(--genre-h2-color);border-bottom:1px solid var(--genre-accent);padding-bottom:6px}
.app-container[class*="style-"] .chapter-content h3{color:var(--genre-h3-color);border-left:4px solid var(--genre-accent);padding-left:16px}
.app-container[class*="style-"] .chapter-content h1+p::first-letter,.app-container[class*="style-"] .chapter-content h2+p::first-letter{color:var(--genre-drop-color);font-family:var(--genre-font)}

/* Sci-fi override: angular/dotted heading borders instead of the shared solid-border treatment */
.app-container.style-scifi .chapter-content h1{border-left:none;border-bottom:2px solid var(--genre-accent);padding-left:0;padding-bottom:8px}
.app-container.style-scifi .chapter-content h2{border-left:6px solid var(--genre-accent);border-bottom:none;padding-left:16px}
.app-container.style-scifi .chapter-content h3{border-left:none;border-bottom:1px dotted var(--genre-accent);padding-left:0}
.app-container.style-scifi .chapter-content h1+p::first-letter,.app-container.style-scifi .chapter-content h2+p::first-letter{font-size:4.5em;color:#00aadd;text-shadow:0 0 20px rgba(0,212,255,.3)}

/* Horror override: glowing drop-cap */
.app-container.style-horror .chapter-content h1+p::first-letter,.app-container.style-horror .chapter-content h2+p::first-letter{color:#5a2a2a;text-shadow:0 0 30px rgba(90,42,42,.4)}

/* toggle switch for continuous view */
.toggle-wrap{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--text-secondary);margin-left:auto}
.toggle-wrap input[type="checkbox"]{width:36px;height:20px;border-radius:20px;background:var(--bg-tertiary);border:1px solid var(--border);appearance:none;-webkit-appearance:none;cursor:pointer;position:relative;flex-shrink:0;transition:all .2s}
.toggle-wrap input[type="checkbox"]:checked{background:var(--accent);border-color:var(--accent)}
.toggle-wrap input[type="checkbox"]::after{content:'';position:absolute;top:2px;left:2px;width:14px;height:14px;background:#fff;border-radius:50%;transition:all .2s}
.toggle-wrap input[type="checkbox"]:checked::after{left:18px}
.toggle-label{user-select:none}
.continuous-chapter{margin-bottom:2em}