:root{--font-heading: "Outfit", sans-serif;--font-body: "Plus Jakarta Sans", sans-serif;--transition-speed: .3s;--transition-curve: cubic-bezier(.4, 0, .2, 1);--sidebar-width: 320px;--topbar-height: 80px}[data-theme=dark]{--bg-main: #0b0c10;--bg-card: #14161f;--bg-sidebar: #0f1015;--border-color: rgba(255, 255, 255, .08);--border-hover: rgba(99, 102, 241, .3);--text-primary: #f3f4f6;--text-secondary: #9ca3af;--text-muted: #6b7280;--accent-primary: #6366f1;--accent-glow: rgba(99, 102, 241, .15);--accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);--cyan-accent: #06b6d4;--tag-bg: rgba(99, 102, 241, .1);--tag-color: #818cf8;--code-bg: #1e1e24}[data-theme=light]{--bg-main: #f9fafb;--bg-card: #ffffff;--bg-sidebar: #f3f4f6;--border-color: rgba(0, 0, 0, .08);--border-hover: rgba(99, 102, 241, .2);--text-primary: #111827;--text-secondary: #4b5563;--text-muted: #9ca3af;--accent-primary: #4f46e5;--accent-glow: rgba(79, 70, 229, .08);--accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);--cyan-accent: #0891b2;--tag-bg: rgba(79, 70, 229, .08);--tag-color: #4f46e5;--code-bg: #f3f4f6}*{margin:0;padding:0;box-sizing:border-box;scroll-behavior:smooth}body{background-color:var(--bg-main);color:var(--text-primary);font-family:var(--font-body);overflow:hidden;transition:background-color var(--transition-speed) var(--transition-curve),color var(--transition-speed) var(--transition-curve)}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;color:var(--text-primary);text-wrap:balance;line-height:1.25}p,li,blockquote{font-family:var(--font-body);font-weight:400;line-height:1.7;color:var(--text-secondary);text-wrap:pretty}.app-layout{display:flex;height:100vh;width:100vw}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0;transition:transform var(--transition-speed) 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var(--border-color)}.theme-toggle-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;background-color:var(--bg-main);border:1px solid var(--border-color);border-radius:8px;padding:12px;color:var(--text-secondary);font-family:var(--font-body);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.theme-toggle-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}[data-theme=dark] .moon-icon,[data-theme=light] .sun-icon{display:none}.main-content{flex-grow:1;display:flex;flex-direction:column;height:100vh;background-color:var(--bg-main)}.top-nav{height:var(--topbar-height);display:flex;align-items:center;padding:0 40px;border-bottom:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background-color:#0b0c10b3;z-index:10}[data-theme=light] 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ul{margin-bottom:24px;padding-left:24px}.book-content li{margin-bottom:8px;font-size:16px}.book-content img{max-width:100%;border-radius:12px;margin:32px 0;box-shadow:0 10px 30px #0000004d;border:1px solid var(--border-color)}.book-content blockquote{border-left:4px solid var(--accent-primary);background-color:var(--accent-glow);padding:16px 24px;margin:24px 0;border-radius:0 8px 8px 0}.book-content blockquote p{margin:0;font-style:italic}.book-content hr{border:none;height:1px;background-color:var(--border-color);margin:40px 0}.book-content pre{position:relative;background-color:var(--code-bg)!important;border-radius:10px;padding:20px!important;margin:24px 0!important;border:1px solid var(--border-color);overflow-x:auto}.book-content code{font-family:Consolas,Courier New,Courier,monospace;font-size:14px}.copy-code-btn{position:absolute;top:10px;right:10px;background-color:#ffffff1a;color:#fff;border:none;border-radius:4px;padding:6px 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