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var(--color-border);position:sticky;top:0;z-index:1000}.nav-brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600;color:var(--color-text);text-decoration:none}.nav-brand:hover{text-decoration:none;color:var(--color-primary)}.nav-brand svg{width:20px;height:20px;color:var(--color-primary)}.nav-center{display:flex;gap:4px}.nav-center a{color:var(--color-text-secondary);text-decoration:none;font-size:14px;font-weight:500;padding:8px 16px;border-radius:var(--radius-sm);transition:background-color var(--transition-fast),color var(--transition-fast)}.nav-center a:hover{color:var(--color-text);background:var(--color-bg-subtle);text-decoration:none}.nav-center a.active{color:var(--color-primary);background:var(--color-primary-subtle)}.nav-right{display:flex;align-items:center;gap:8px}.nav-icon-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--color-text-secondary);transition:background-color var(--transition-fast),color var(--transition-fast)}.nav-icon-btn:hover{background:var(--color-bg-subtle);color:var(--color-text)}.nav-icon-btn svg{width:18px;height:18px}.github-link{display:flex;align-items:center;justify-content:center;width:36px;height:36px;color:var(--color-text-secondary);border-radius:var(--radius-sm);transition:background-color var(--transition-fast),color var(--transition-fast)}.github-link:hover{background:var(--color-bg-subtle);color:var(--color-text);text-decoration:none}.github-link svg{width:18px;height:18px}.main-content{flex:1}.footer{padding:16px 24px;text-align:center;background:var(--color-bg-elevated);border-top:1px solid var(--color-border)}.footer p{margin:0;font-size:13px;color:var(--color-text-muted)}.footer a{color:var(--color-primary)}@media (max-width: 768px){.navbar{padding:0 16px}.nav-brand{font-size:14px}.nav-brand span{display:none}.nav-center a{padding:8px 12px;font-size:13px}}@media (max-width: 480px){.nav-center{gap:2px}.nav-center a{padding:8px}}:root{--color-bg: #f8f9fa;--color-bg-elevated: #ffffff;--color-bg-subtle: #f1f3f4;--color-border: #e0e0e0;--color-border-subtle: #eee;--color-text: #1a1a1a;--color-text-secondary: #555;--color-text-muted: #888;--color-primary: #4a90d9;--color-primary-hover: #3a7bc8;--color-primary-subtle: rgba(74, 144, 217, .1);--color-success: #2b8a3e;--color-warning: #e67700;--color-error: #c92a2a;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--transition-fast: .15s ease;--transition-normal: .2s ease}[data-theme=dark]{--color-bg: #0f0f0f;--color-bg-elevated: #1a1a1a;--color-bg-subtle: #252525;--color-border: #333;--color-border-subtle: #2a2a2a;--color-text: #f0f0f0;--color-text-secondary: #b0b0b0;--color-text-muted: #777;--color-primary: #5a9fe9;--color-primary-hover: #4a8fd9;--color-primary-subtle: rgba(90, 159, 233, .15);--color-success: #40c057;--color-warning: #fab005;--color-error: #ff6b6b;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5)}*,*:before,*:after{box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5;color:var(--color-text);background-color:var(--color-bg);transition:background-color var(--transition-normal),color var(--transition-normal)}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;cursor:pointer}img{max-width:100%;height:auto}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-bg-subtle)}::-webkit-scrollbar-thumb{background:var(--color-text-muted);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-text-secondary)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}