.app{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}.header{padding:1.25rem 2rem;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.header--with-actions{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}.header-left{display:flex;align-items:baseline;gap:.75rem;min-width:0}.brand{font-size:1.5rem;font-weight:700;color:var(--text);margin:0;letter-spacing:-.02em}.tagline{margin:.25rem 0 0;font-size:.9375rem;color:var(--text-secondary)}.file-name{font-size:.875rem;color:var(--text-tertiary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}.header-actions{display:flex;align-items:center;gap:.75rem}.main{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.main--with-toc{display:flex;gap:2rem;align-items:flex-start;padding:2rem;max-width:1400px}.content-wrap{flex:1;min-width:0}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.875rem;font-weight:500;border-radius:8px;border:1px solid transparent;cursor:pointer;transition:background .2s,border-color .2s,color .2s}.btn-primary{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}.btn-primary:hover{filter:brightness(1.08)}.btn-secondary{background:var(--bg);color:var(--text-secondary);border-color:var(--border)}.btn-secondary:hover{color:var(--text);border-color:var(--text-tertiary)}.dropzone{position:relative;margin:2rem auto;max-width:480px;padding:3rem 2rem;border:2px dashed var(--border);border-radius:12px;background:var(--bg-secondary);text-align:center;transition:border-color .2s,background .2s}.dropzone:hover,.dropzone:focus-within{border-color:var(--primary);background:var(--bg)}.dropzone-icon{font-size:3rem;margin-bottom:1rem;opacity:.9}.dropzone-text{margin:0;font-size:1rem;color:var(--text-secondary)}.dropzone-text strong{color:var(--text)}.dropzone-input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.toc{width:280px;flex-shrink:0;position:sticky;top:1.5rem;max-height:calc(100vh - 2rem);overflow-y:auto;padding:1.5rem;background:var(--bg-secondary);border-radius:8px;border:1px solid var(--border);scrollbar-color:var(--border) transparent;scrollbar-width:thin}.toc::-webkit-scrollbar{width:8px}.toc::-webkit-scrollbar-track{background:transparent;border-radius:4px}.toc::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.toc::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}.toc-title{margin:0 0 1rem;font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary)}.toc-list{list-style:none;padding:0;margin:0}.toc-item{margin-bottom:.5rem}.toc-link{display:block;padding:.375rem .75rem;font-size:.8125rem;font-weight:400;color:var(--text-secondary);text-decoration:none;border-radius:4px;transition:color .2s,background .2s}.toc-link:hover{color:var(--text);background:var(--bg)}.toc-link--active{font-weight:600;color:var(--primary);background:var(--bg)}.toc-item:has(.toc-link--active) .toc-link{font-size:.875rem}.scroll-to-top{position:fixed;bottom:1.5rem;right:1.5rem;width:2.75rem;height:2.75rem;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--primary);color:var(--primary-contrast);border:none;cursor:pointer;font-size:1.25rem;line-height:1;box-shadow:0 4px 12px #0000004d;transition:opacity .2s,transform .2s,background .2s;z-index:100}.scroll-to-top:hover{background:var(--primary);filter:brightness(1.12);transform:translateY(-2px)}.scroll-to-top:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.scroll-to-top--hidden{opacity:0;pointer-events:none;transform:translateY(4px)}:root{--bg: #0f0f12;--bg-secondary: #18181c;--bg-tertiary: #222228;--text: #e8e8ed;--text-secondary: #a0a0ab;--text-tertiary: #6b6b76;--border: #2a2a32;--primary: #6366f1;--primary-contrast: #fff;--font-size-base: 1rem;--font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-mono: ui-monospace, "Cascadia Code", "Consolas", monospace}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font-sans);font-size:var(--font-size-base);line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}#root{min-height:100vh}.doc-viewer{max-width:900px;margin:0 auto}.doc-title{font-size:2rem;font-weight:700;margin-bottom:1rem;color:var(--text);letter-spacing:-.02em}.doc-body{line-height:1.7;color:var(--text);font-size:var(--font-size-base)}.doc-section{margin-bottom:2.5rem}.doc-h1{font-size:1.75rem;font-weight:700;margin-top:2rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--border);color:var(--text)}.doc-h1:first-child{margin-top:0}.doc-h2{font-size:1.5rem;font-weight:600;margin-top:2rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--border);color:var(--text)}.doc-h3{font-size:1.25rem;font-weight:600;margin-top:1.5rem;margin-bottom:.75rem;color:var(--text)}.doc-h4{font-size:1.125rem;font-weight:600;margin-top:1.25rem;margin-bottom:.625rem;color:var(--text)}.doc-p{margin-bottom:1rem;color:var(--text-secondary)}.doc-ul{margin-bottom:1rem;padding-left:1.5rem;color:var(--text-secondary)}.doc-ul--nested{margin-top:.375rem;margin-bottom:0;padding-left:1.25rem;list-style-type:circle}.doc-li{margin-bottom:.5rem;line-height:1.6}.doc-ol{margin-bottom:1rem;padding-left:1.5rem;color:var(--text-secondary)}.doc-ol li{margin-bottom:.5rem;line-height:1.6}.doc-code{background:var(--bg-tertiary);padding:.125rem .375rem;border-radius:4px;font-size:.875em;font-family:var(--font-mono);color:var(--text)}.doc-code-block{background:var(--bg-tertiary);padding:1rem;border-radius:8px;overflow-x:auto;margin-bottom:1rem;font-size:.875rem;line-height:1.6;border:1px solid var(--border)}.doc-code-block code{font-family:var(--font-mono);color:var(--text)}.doc-strong{font-weight:600;color:var(--text)}.doc-blockquote{border-left:4px solid var(--primary);padding-left:1rem;margin-left:0;margin-bottom:1rem;font-style:italic;color:var(--text-secondary)}.doc-link{color:var(--primary);text-decoration:none}.doc-link:hover{text-decoration:underline}.doc-table-wrap{overflow-x:auto;margin-bottom:1rem}.doc-table{width:100%;border-collapse:collapse;border:1px solid var(--border)}.doc-table-head{background:var(--bg-secondary)}.doc-table-cell{padding:.75rem;border:1px solid var(--border);color:var(--text-secondary)}.doc-table-cell--header{text-align:left;font-weight:600;background:var(--bg-secondary);color:var(--text)}