:root{--color-bg: #ffffff;--color-bg-secondary: #f5f5f5;--color-text: #1a1a1a;--color-text-secondary: #555555;--color-text-muted: #888888;--color-primary: #3b82f6;--color-primary-dark: #2563eb;--color-primary-light: #93c5fd;--color-border: #e5e5e5;--color-divider: #d1d5db;--color-code-bg: #f3f4f6;--color-quote-bg: #f9fafb;--color-quote-border: #e5e7eb;--font-size: 18px;--line-height: 1.6;--max-width: 65ch;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--font-family-serif: "Georgia", "Times New Roman", Times, serif;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--radius-sm: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--radius-full: 9999px}[data-theme=dark]{--color-bg: #111111;--color-bg-secondary: #1a1a1a;--color-text: #f5f5f5;--color-text-secondary: #d1d5db;--color-text-muted: #9ca3af;--color-primary: #60a5fa;--color-primary-dark: #3b82f6;--color-primary-light: #93c5fd;--color-border: #2d2d2d;--color-divider: #404040;--color-code-bg: #1f1f1f;--color-quote-bg: #1a1a1a;--color-quote-border: #2d2d2d}*,*:before,*:after{box-sizing:border-box}html{font-size:var(--font-size);scroll-behavior:smooth}body{margin:0;padding:0;font-family:var(--font-family);font-size:1rem;line-height:var(--line-height);color:var(--color-text);background-color:var(--color-bg);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-normal),color var(--transition-normal)}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.skip-link{position:absolute;top:-100%;left:0;padding:var(--spacing-sm) 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img{max-width:100%;height:auto;display:block;margin:var(--spacing-lg) auto;border-radius:var(--radius-md)}.chapter-content blockquote{margin:var(--spacing-lg) 0;padding:var(--spacing-md) var(--spacing-lg);background-color:var(--color-quote-bg);border-left:4px solid var(--color-quote-border);font-style:italic}.chapter-content code{background-color:var(--color-code-bg);padding:.125rem .25rem;border-radius:var(--radius-sm);font-family:Consolas,Monaco,Courier New,monospace;font-size:.875em}.chapter-content pre{background-color:var(--color-code-bg);padding:var(--spacing-md);border-radius:var(--radius-md);overflow-x:auto}.chapter-content pre code{padding:0;background:none}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-sm) var(--spacing-lg);font-size:1rem;font-weight:500;border:none;border-radius:var(--radius-md);cursor:pointer;transition:background-color var(--transition-fast),transform var(--transition-fast)}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--color-bg-secondary);color:var(--color-text)}.btn-secondary:hover{background-color:var(--color-border)}.card{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:box-shadow var(--transition-normal)}.card:hover{box-shadow:var(--shadow-md)}.pagination{display:flex;justify-content:center;align-items:center;gap:var(--spacing-sm);margin:var(--spacing-xl) 0}.pagination a,.pagination span{padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);min-width:2.5rem;text-align:center}.pagination a{background-color:var(--color-bg-secondary);color:var(--color-text);transition:background-color var(--transition-fast)}.pagination a:hover,.pagination a:focus{background-color:var(--color-primary);color:#fff;text-decoration:none}.pagination .current{background-color:var(--color-primary);color:#fff;font-weight:600}.pagination .disabled{color:var(--color-text-muted);pointer-events:none}.progress-bar{position:fixed;top:0;left:0;width:0%;height:3px;background-color:var(--color-primary);transition:width .1s linear;z-index:1000}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}@media (max-width: 768px){html{font-size:16px}h1{font-size:2rem}h2{font-size:1.75rem}h3{font-size:1.25rem}.content-wrapper{padding:var(--spacing-lg) var(--spacing-md)}.chapter-content{padding:var(--spacing-lg) 0}}@media print{body{background-color:#fff;color:#000}.progress-bar,.btn,.pagination,nav,footer{display:none!important}.chapter-content{max-width:100%}}.site-header[data-astro-cid-sckkx6r4]{position:sticky;top:0;z-index:100;background-color:var(--color-bg);border-bottom:1px solid var(--color-border);transition:background-color var(--transition-normal)}.nav[data-astro-cid-sckkx6r4]{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) 0;gap:var(--spacing-lg)}.nav-logo[data-astro-cid-sckkx6r4]{font-size:1.5rem;font-weight:700;color:var(--color-text);text-decoration:none!important}.nav-links[data-astro-cid-sckkx6r4]{display:flex;list-style:none;margin:0;padding:0;gap:var(--spacing-lg)}.nav-links[data-astro-cid-sckkx6r4] a[data-astro-cid-sckkx6r4]{color:var(--color-text);font-weight:500}.theme-toggle[data-astro-cid-sckkx6r4]{background:none;border:1px solid var(--color-border);border-radius:var(--radius-full);width:2.5rem;height:2.5rem;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.25rem;padding:0}.theme-toggle[data-astro-cid-sckkx6r4]:hover{background-color:var(--color-bg-secondary)}.theme-icon-sun[data-astro-cid-sckkx6r4],.theme-icon-moon[data-astro-cid-sckkx6r4]{display:none}.site-footer[data-astro-cid-sckkx6r4]{margin-top:var(--spacing-2xl);padding:var(--spacing-xl) 0;border-top:1px solid var(--color-border);text-align:center}.footer-text[data-astro-cid-sckkx6r4]{color:var(--color-text-secondary);margin:0 0 var(--spacing-sm) 0}.footer-links[data-astro-cid-sckkx6r4]{color:var(--color-text-muted);margin:0}.footer-links[data-astro-cid-sckkx6r4] a[data-astro-cid-sckkx6r4]{color:var(--color-text-muted)}@media (max-width: 768px){.nav[data-astro-cid-sckkx6r4]{flex-wrap:wrap}.nav-links[data-astro-cid-sckkx6r4]{order:3;width:100%;justify-content:center;gap:var(--spacing-md)}}