:root{--bg-primary: #0a0a0b;--bg-secondary: #141416;--bg-tertiary: #1c1c1f;--accent-primary: #00d4aa;--accent-secondary: #00b894;--accent-glow: rgba(0, 212, 170, .15);--text-primary: #fafafa;--text-secondary: #a1a1aa;--text-muted: #71717a;--border-color: #27272a;--error: #ef4444;--warning: #f59e0b;--success: #10b981;--font-display: "Space Grotesk", sans-serif;--font-mono: "JetBrains Mono", monospace;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-medium: .3s cubic-bezier(.4, 0, .2, 1);--transition-slow: .5s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-mono);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6;position:relative;overflow-x:hidden}body:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(0,212,170,.08),transparent),radial-gradient(ellipse 60% 40% at 50% 120%,rgba(0,212,170,.05),transparent);pointer-events:none;z-index:0}.noise-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");opacity:.025;pointer-events:none;z-index:1}.container{position:relative;z-index:2;max-width:720px;margin:0 auto;padding:3rem 1.5rem;min-height:100vh;display:flex;flex-direction:column}::selection{background:var(--accent-primary);color:var(--bg-primary)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 640px){.container{padding:2rem 1rem}}.header{text-align:center;margin-bottom:3rem;animation:fadeInUp .8s ease-out}.header-badge{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.6875rem;font-weight:500;letter-spacing:.15em;color:var(--text-muted);padding:.5rem 1rem;border:1px solid var(--border-color);border-radius:2px;margin-bottom:1.5rem;text-transform:uppercase}.header-badge a{color:var(--accent-primary);text-decoration:none}.header-badge a:hover{text-decoration:underline}.badge-dot{width:6px;height:6px;background:var(--accent-primary);border-radius:50%;animation:pulse 2s ease-in-out infinite}.title{font-family:var(--font-display);font-size:clamp(2.5rem,8vw,4rem);font-weight:700;line-height:.95;letter-spacing:-.03em;margin-bottom:1rem}.title-line{display:block}.title-line--accent{color:var(--accent-primary);text-shadow:0 0 40px var(--accent-glow)}.subtitle{font-family:var(--font-mono);font-size:.875rem;color:var(--text-secondary);max-width:420px;margin:0 auto;line-height:1.7}.upload-zone{position:relative;background:var(--bg-secondary);border-radius:4px;padding:3px;transition:all var(--transition-medium)}.upload-zone--dragover{background:var(--accent-primary);transform:scale(1.01)}.upload-zone--dragover .upload-zone__border{border-color:var(--accent-primary)}.upload-zone__border{position:absolute;top:0;right:0;bottom:0;left:0;border:1px dashed var(--border-color);border-radius:4px;pointer-events:none;transition:border-color var(--transition-medium)}.upload-zone--dragover .upload-zone__border{border-style:solid;border-width:2px}.upload-zone__corner{position:absolute;width:8px;height:8px;border-color:var(--text-muted);border-style:solid;opacity:0;transition:opacity var(--transition-medium)}.upload-zone:hover .upload-zone__corner,.upload-zone--dragover .upload-zone__corner{opacity:1;border-color:var(--accent-primary)}.upload-zone__corner--tl{top:-1px;left:-1px;border-width:2px 0 0 2px}.upload-zone__corner--tr{top:-1px;right:-1px;border-width:2px 2px 0 0}.upload-zone__corner--bl{bottom:-1px;left:-1px;border-width:0 0 2px 2px}.upload-zone__corner--br{bottom:-1px;right:-1px;border-width:0 2px 2px 0}.upload-input{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer;z-index:10}.upload-content{padding:3rem 2rem;text-align:center;transition:opacity var(--transition-medium),transform var(--transition-medium)}.upload-zone.has-file .upload-content{opacity:0;pointer-events:none;transform:translateY(-10px)}.upload-icon{width:48px;height:48px;margin:0 auto 1.25rem;color:var(--text-muted);transition:color var(--transition-medium),transform var(--transition-medium)}.upload-zone:hover .upload-icon{color:var(--accent-primary);transform:translateY(-2px)}.upload-icon svg{width:100%;height:100%}.upload-text{display:flex;flex-direction:column;gap:.25rem}.upload-text--primary{font-family:var(--font-display);font-size:1.125rem;font-weight:600;color:var(--text-primary)}.upload-text--secondary{font-size:.8125rem;color:var(--text-muted)}.upload-hint{margin-top:1rem;font-size:.6875rem;color:var(--text-muted);letter-spacing:.05em}.file-info{position:absolute;top:3px;right:3px;bottom:3px;left:3px;display:none;align-items:center;gap:1rem;padding:1.5rem;background:var(--bg-tertiary);border-radius:2px;animation:slideIn .3s ease-out}.upload-zone.has-file .file-info{display:flex}.file-icon{flex-shrink:0;width:40px;height:40px;color:var(--accent-primary)}.file-icon svg{width:100%;height:100%}.file-details{flex:1;min-width:0}.file-name{font-family:var(--font-display);font-size:.9375rem;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-size{font-size:.75rem;color:var(--text-muted);margin-top:.125rem}.file-remove{flex-shrink:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border-color);border-radius:2px;color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast)}.file-remove:hover{border-color:var(--error);color:var(--error);background:#ef44441a}.file-remove svg{width:16px;height:16px}@media (max-width: 640px){.upload-content{padding:2rem 1.5rem}}.split-button{position:relative;display:flex;align-items:center;justify-content:center;gap:.75rem;width:100%;padding:1.125rem 1.5rem;font-family:var(--font-display);font-size:.9375rem;font-weight:600;letter-spacing:.02em;color:var(--bg-primary);background:var(--accent-primary);border:none;border-radius:4px;cursor:pointer;overflow:hidden;transition:all var(--transition-medium)}.split-button:disabled{opacity:.4;cursor:not-allowed}.split-button:not(:disabled):hover{background:var(--accent-secondary);transform:translateY(-1px);box-shadow:0 4px 20px var(--accent-glow)}.split-button:not(:disabled):active{transform:translateY(0)}.split-button__text{position:relative;z-index:2}.split-button__icon{position:relative;z-index:2;width:18px;height:18px;transition:transform var(--transition-medium)}.split-button:not(:disabled):hover .split-button__icon{transform:translate(3px)}.split-button__icon svg{width:100%;height:100%}.split-button__progress{position:absolute;bottom:0;left:0;height:3px;background:#0003;width:0;transition:width .1s linear}.split-button.processing{pointer-events:none}.status{display:none;padding:1rem 1.25rem;border-radius:4px;border:1px solid var(--border-color);animation:slideIn .3s ease-out}.status--visible{display:block}.status--error{background:#ef44440d;border-color:#ef44444d}.status--success{background:#10b9810d;border-color:#10b9814d}.status-content{display:flex;align-items:flex-start;gap:.75rem}.status-icon{flex-shrink:0;width:18px;height:18px;margin-top:.125rem}.status-icon:before{content:"";display:block;width:100%;height:100%;border-radius:50%}.status--error .status-icon:before{background:var(--error);mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3'%3E%3Cpath d='M18 6L6 18M6 6L18 18'/%3E%3C/svg%3E") center/contain no-repeat;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3'%3E%3Cpath d='M18 6L6 18M6 6L18 18'/%3E%3C/svg%3E") center/contain no-repeat}.status--success .status-icon:before{background:var(--success);mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3'%3E%3Cpath d='M20 6L9 17L4 12'/%3E%3C/svg%3E") center/contain no-repeat;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='3'%3E%3Cpath d='M20 6L9 17L4 12'/%3E%3C/svg%3E") center/contain no-repeat}.status-message{font-size:.8125rem;color:var(--text-secondary);line-height:1.6}.status--error .status-message{color:#fca5a5}.status--success .status-message{color:#6ee7b7}.chapters-preview{display:none;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:4px;padding:1.5rem;animation:slideIn .4s ease-out}.chapters-preview--visible{display:block}.chapters-preview__title{font-family:var(--font-display);font-size:.75rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);margin-bottom:1rem}.chapters-list{list-style:none;display:flex;flex-direction:column;gap:.5rem}.chapter-item{display:flex;align-items:center;gap:.75rem;padding:.75rem;background:var(--bg-tertiary);border-radius:2px;font-size:.8125rem;animation:slideIn .3s ease-out backwards}.chapter-item:nth-child(1){animation-delay:.05s}.chapter-item:nth-child(2){animation-delay:.1s}.chapter-item:nth-child(3){animation-delay:.15s}.chapter-item:nth-child(4){animation-delay:.2s}.chapter-item:nth-child(5){animation-delay:.25s}.chapter-number{flex-shrink:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);border-radius:2px;font-family:var(--font-mono);font-size:.6875rem;font-weight:600;color:var(--accent-primary)}.chapter-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-primary)}.chapter-pages{flex-shrink:0;font-size:.6875rem;color:var(--text-muted)}.footer{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border-color)}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.footer-cell{display:flex;flex-direction:column;gap:.25rem;padding:1rem;background:var(--bg-secondary);border-radius:2px}.footer-label{font-family:var(--font-mono);font-size:.625rem;font-weight:700;color:var(--accent-primary);letter-spacing:.1em}.footer-value{font-family:var(--font-display);font-size:.75rem;font-weight:500;color:var(--text-secondary)}@media (max-width: 640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}.main{flex:1;display:flex;flex-direction:column;gap:1.5rem}