:root{--color-bg: #ffffff;--color-bg-elevated: #f8fafc;--color-bg-muted: #f1f5f9;--color-bg-code: #f8fafc;--color-text: #0f172a;--color-text-secondary: #475569;--color-text-muted: #64748b;--color-primary: #3b82f6;--color-primary-hover: #2563eb;--color-primary-subtle: #dbeafe;--color-accent: #8b5cf6;--color-success: #10b981;--color-warning: #f59e0b;--color-border: #e2e8f0;--color-border-subtle: #f1f5f9;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--sidebar-width: 280px;--content-max-width: 860px;--header-height: 64px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--transition-fast: .15s ease;--transition-normal: .25s ease}[data-theme=dark]{--color-bg: #0f172a;--color-bg-elevated: #1e293b;--color-bg-muted: #334155;--color-bg-code: #1e293b;--color-text: #f1f5f9;--color-text-secondary: #cbd5e1;--color-text-muted: #94a3b8;--color-primary: #60a5fa;--color-primary-hover: #93c5fd;--color-primary-subtle: #1e3a5f;--color-accent: #a78bfa;--color-success: #34d399;--color-warning: #fbbf24;--color-border: #334155;--color-border-subtle: #1e293b;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .4), 0 2px 4px -2px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4), 0 4px 6px -4px rgb(0 0 0 / .3)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.7;color:var(--color-text);background:var(--color-bg);transition:background-color var(--transition-normal),color var(--transition-normal)}.site-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--color-bg-elevated);border-right:1px solid var(--color-border);position:fixed;top:0;left:0;bottom:0;overflow-y:auto;padding:1.5rem;z-index:100;transition:background-color var(--transition-normal),border-color var(--transition-normal)}.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-track{background:transparent}.sidebar::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}.sidebar-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:2rem;padding-bottom:1.25rem;border-bottom:1px solid var(--color-border)}.sidebar-title{font-size:1rem;font-weight:700;color:var(--color-text);text-decoration:none;display:block;line-height:1.4;letter-spacing:-.01em;transition:color var(--transition-fast)}.sidebar-title:hover{color:var(--color-primary)}.theme-toggle{background:var(--color-bg-muted);border:1px solid var(--color-border);border-radius:var(--radius-sm);width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.theme-toggle:hover{background:var(--color-primary-subtle);border-color:var(--color-primary)}.theme-toggle svg{width:18px;height:18px;color:var(--color-text-secondary);transition:color var(--transition-fast)}.theme-toggle:hover svg{color:var(--color-primary)}.theme-toggle .sun-icon{display:none}.theme-toggle .moon-icon,[data-theme=dark] .theme-toggle .sun-icon{display:block}[data-theme=dark] .theme-toggle .moon-icon{display:none}.sidebar-nav{display:flex;flex-direction:column;gap:1.75rem}.nav-part{display:flex;flex-direction:column;gap:.125rem}.nav-part-title{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);margin-bottom:.625rem;padding-left:.75rem}.nav-link{display:block;padding:.5rem .75rem;color:var(--color-text-secondary);text-decoration:none;font-size:.875rem;font-weight:500;border-radius:var(--radius-sm);transition:all var(--transition-fast);border:1px solid transparent}.nav-link:hover{background:var(--color-bg-muted);color:var(--color-text);text-decoration:none}.nav-link.active{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.main-content{flex:1;margin-left:var(--sidebar-width);padding:3rem 4rem;max-width:calc(var(--content-max-width) + var(--sidebar-width) + 8rem);transition:background-color var(--transition-normal)}.content-wrapper{max-width:var(--content-max-width)}h1,h2,h3,h4,h5,h6{line-height:1.3;margin-top:2.5rem;margin-bottom:1rem;font-weight:700;letter-spacing:-.02em;color:var(--color-text)}h1{font-size:2.25rem;margin-top:0;padding-bottom:1rem;border-bottom:2px solid var(--color-border);background:linear-gradient(135deg,var(--color-text) 0%,var(--color-text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}[data-theme=dark] h1{background:linear-gradient(135deg,var(--color-text) 0%,var(--color-primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h2{font-size:1.5rem;margin-top:3rem;color:var(--color-text)}h3{font-size:1.25rem;color:var(--color-text)}h4{font-size:1.1rem;color:var(--color-text)}p{margin-bottom:1.25rem;color:var(--color-text-secondary)}.content-wrapper>p:first-of-type{font-size:1.125rem;color:var(--color-text-secondary);line-height:1.8}a{color:var(--color-primary);text-decoration:none;font-weight:500;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-hover);text-decoration:underline}strong{font-weight:600;color:var(--color-text)}ul,ol{margin-bottom:1.25rem;padding-left:1.5rem}li{margin-bottom:.625rem;color:var(--color-text-secondary)}li>ul,li>ol{margin-top:.5rem;margin-bottom:.5rem}li::marker{color:var(--color-primary)}li:has(input[type=checkbox]){list-style:none;margin-left:-1.5rem;padding-left:0}input[type=checkbox]{appearance:none;width:18px;height:18px;border:2px solid var(--color-border);border-radius:4px;margin-right:.5rem;vertical-align:middle;position:relative;top:-1px;transition:all var(--transition-fast);background:var(--color-bg)}input[type=checkbox]:checked{background:var(--color-primary);border-color:var(--color-primary)}input[type=checkbox]:checked:after{content:"";position:absolute;left:5px;top:2px;width:4px;height:8px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg)}table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.9rem;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--color-border)}th,td{padding:.875rem 1rem;text-align:left;border-bottom:1px solid var(--color-border)}th{background:var(--color-bg-elevated);font-weight:600;color:var(--color-text);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}td{color:var(--color-text-secondary)}tr:last-child td{border-bottom:none}tr:nth-child(2n) td{background:var(--color-bg-muted)}tr:hover td{background:var(--color-primary-subtle)}code{font-family:JetBrains Mono,SF Mono,Monaco,Consolas,monospace;font-size:.85em;background:var(--color-bg-muted);padding:.2em .4em;border-radius:4px;color:var(--color-accent);border:1px solid var(--color-border-subtle)}pre{background:var(--color-bg-elevated);padding:1.25rem 1.5rem;border-radius:var(--radius-md);overflow-x:auto;margin:1.5rem 0;border:1px solid var(--color-border);box-shadow:var(--shadow-sm)}pre code{background:none;padding:0;font-size:.85rem;line-height:1.7;color:var(--color-text-secondary);border:none}blockquote{border-left:4px solid var(--color-primary);padding:1.25rem 1.5rem;margin:1.5rem 0;background:var(--color-primary-subtle);border-radius:0 var(--radius-md) var(--radius-md) 0}blockquote p{color:var(--color-text);font-style:italic}blockquote p:last-child{margin-bottom:0}hr{border:none;border-top:1px solid var(--color-border);margin:3rem 0}.mermaid-diagram{margin:2rem 0;padding:2rem;background:var(--color-bg-elevated);border-radius:var(--radius-lg);border:1px solid var(--color-border);overflow-x:auto;box-shadow:var(--shadow-sm);transition:background-color var(--transition-normal),border-color var(--transition-normal)}.mermaid-diagram svg{max-width:100%;height:auto;display:block;margin:0 auto}.mermaid-error{color:var(--color-warning);font-size:.85rem}.doc-navigation{display:flex;justify-content:space-between;gap:1.5rem;margin-top:4rem;padding-top:2rem;border-top:1px solid var(--color-border)}.doc-nav-link{display:flex;flex-direction:column;gap:.375rem;padding:1.25rem 1.5rem;background:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-md);text-decoration:none;transition:all var(--transition-fast);max-width:45%;box-shadow:var(--shadow-sm)}.doc-nav-link:hover{background:var(--color-primary-subtle);border-color:var(--color-primary);text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-md)}.doc-nav-link.prev{align-items:flex-start}.doc-nav-link.next{align-items:flex-end;margin-left:auto}.doc-nav-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;font-weight:600;color:var(--color-text-muted)}.doc-nav-title{font-weight:600;color:var(--color-primary);font-size:.95rem}.home-hero{text-align:center;padding:4rem 2rem;margin-bottom:4rem;border-bottom:1px solid var(--color-border);background:var(--color-bg-elevated);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.home-hero h1{border:none;font-size:2.75rem;margin-bottom:1rem;padding-bottom:0}.home-hero p{font-size:1.25rem;color:var(--color-text-secondary);max-width:640px;margin:0 auto;line-height:1.7}.home-section{margin-bottom:4rem}.home-section h2{margin-top:0;margin-bottom:1.5rem}.parts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-top:1.5rem}.part-card{background:var(--color-bg-elevated);border-radius:var(--radius-md);padding:1.5rem;border:1px solid var(--color-border);transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.part-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.part-card h3{margin-top:0;margin-bottom:1rem;font-size:1rem;color:var(--color-text);display:flex;align-items:center;gap:.5rem}.part-card h3:before{content:"";width:4px;height:1em;background:var(--color-primary);border-radius:2px}.part-card ul{list-style:none;padding:0;margin:0}.part-card li{margin-bottom:.5rem;padding-left:0}.part-card a{color:var(--color-text-secondary);font-size:.9rem;font-weight:500;display:block;padding:.375rem 0;transition:all var(--transition-fast)}.part-card a:hover{color:var(--color-primary);text-decoration:none;padding-left:.5rem}.quick-ref-table{margin-top:1.5rem}.start-button{display:inline-flex;align-items:center;gap:.625rem;padding:.875rem 2rem;background:#2563eb;color:#fff;border-radius:var(--radius-md);font-weight:600;font-size:1rem;margin-top:1.5rem;transition:all var(--transition-fast);box-shadow:var(--shadow-md)}.start-button:hover{background:#1d4ed8;text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-lg);color:#fff}[data-theme=dark] .start-button{background:#3b82f6;color:#0f172a}[data-theme=dark] .start-button:hover{background:#60a5fa;color:#0f172a}.start-button svg{transition:transform var(--transition-fast)}.start-button:hover svg{transform:translate(4px)}.error-page{text-align:center;padding:4rem 2rem}.error-page h1{font-size:6rem;border:none;margin-bottom:1rem}@media (max-width: 1100px){.main-content{padding:2rem 3rem}.home-hero{padding:3rem 2rem}}@media (max-width: 900px){.sidebar{position:static;width:100%;border-right:none;border-bottom:1px solid var(--color-border);padding:1rem 1.5rem}.sidebar-nav{display:none}.sidebar-header{margin-bottom:0;padding-bottom:0;border-bottom:none}.main-content{margin-left:0;padding:2rem 1.5rem}.site-layout{flex-direction:column}.doc-navigation{flex-direction:column;gap:1rem}.doc-nav-link{max-width:100%}.doc-nav-link.next{align-items:flex-start}.home-hero{padding:2rem 1.5rem;border-radius:var(--radius-md)}.home-hero h1{font-size:2rem}.home-hero p{font-size:1.1rem}}@media print{.sidebar{display:none}.main-content{margin-left:0;padding:0}.theme-toggle,.doc-navigation{display:none}}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}