.loading-container{align-items:center;color:var(--text-primary);display:flex;flex-direction:column;justify-content:center;min-height:400px;text-align:center}.loading-spinner{animation:spin 1s linear infinite;border-top:4px solid var(--border-color);border:4px solid var(--border-color);border-radius:50%;border-top-color:var(--accent-color);height:50px;margin-bottom:var(--spacing-base);width:50px}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}:focus{outline:2px solid var(--accent-color);outline-offset:2px}html{scroll-behavior:smooth}::selection{background-color:var(--accent-color);color:#fff}::-moz-selection{background-color:var(--accent-color);color:#fff}.header{background-color:var(--bg-secondary);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow);font-family:var(--font-family);font-size:var(--font-size-base);left:0;position:fixed;right:0;top:0;z-index:1000}.header-content{align-items:center;display:flex;height:70px;justify-content:space-between;margin:0 auto;max-width:1200px;padding:0 var(--spacing-base)}.logo-link{color:var(--text-primary);font-size:1.5rem;font-weight:700;text-decoration:none;transition:color .3s ease}.logo-link:hover{color:var(--accent-color)}.nav{display:flex;gap:var(--spacing-base)}.nav-link{border-radius:var(--border-radius);color:var(--text-secondary);font-weight:500;padding:.5rem 1rem;text-decoration:none;transition:all .3s ease}.nav-link:hover{color:var(--text-primary)}.nav-link.active,.nav-link:hover{background-color:var(--bg-primary)}.nav-link.active{color:var(--accent-color)}.theme-switcher{position:relative}.theme-select{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-primary);cursor:pointer;font-family:var(--font-family);font-size:var(--font-size-base);padding:.5rem 1rem;transition:all .3s ease}.theme-select:focus,.theme-select:hover{border-color:var(--accent-color)}.theme-select:focus{box-shadow:0 0 0 2px #007bff40;outline:none}@media (max-width:768px){.header-content{flex-direction:column;gap:1rem;height:auto;padding:1rem var(--spacing-base)}.nav{order:2}.theme-switcher{order:3}.logo{order:1}}.layout{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-family);font-size:var(--font-size-base);min-height:100vh;transition:all .3s ease}.main-content{margin:0 auto;max-width:1200px;min-height:calc(100vh - 90px);padding-left:var(--spacing-base);padding-right:var(--spacing-base);padding-top:90px}.layout-theme1 .main-content{line-height:1.6;padding:90px var(--spacing-base) var(--spacing-base)}.layout-theme2{display:flex}.layout-theme2 .main-content{background-color:var(--bg-primary);flex:1 1;margin-left:250px;padding:90px var(--spacing-base) var(--spacing-base)}.layout-theme2:before{background-color:var(--bg-secondary);border-right:1px solid var(--border-color);content:"";height:calc(100vh - 70px);left:0;position:fixed;top:70px;width:250px;z-index:100}.layout-theme3 .main-content{background:linear-gradient(135deg,var(--bg-primary) 0,var(--bg-secondary) 100%);padding:90px var(--spacing-base) var(--spacing-base)}@media (max-width:768px){.main-content{padding-top:120px}.layout-theme2{display:block}.layout-theme2 .main-content{margin-left:0;padding:120px var(--spacing-base) var(--spacing-base)}.layout-theme2:before{display:none}.layout-theme3 .main-content{padding:120px var(--spacing-base) var(--spacing-base)}}@media (max-width:480px){.main-content{padding-left:calc(var(--spacing-base)/2);padding-right:calc(var(--spacing-base)/2)}}*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;transition:all .3s ease}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}[data-theme=theme1]{--bg-primary:#fff;--bg-secondary:#f8f9fa;--text-primary:#212529;--text-secondary:#6c757d;--accent-color:#007bff;--border-color:#dee2e6;--shadow:0 2px 4px #0000001a;--font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-size-base:16px;--spacing-base:1rem;--border-radius:4px}[data-theme=theme2]{--bg-primary:#1a1a1a;--bg-secondary:#2d2d2d;--text-primary:#fff;--text-secondary:#b0b0b0;--accent-color:#ff6b6b;--border-color:#404040;--shadow:0 4px 8px #0000004d;--font-family:"Georgia","Times New Roman",serif;--font-size-base:18px;--spacing-base:1.5rem;--border-radius:8px}[data-theme=theme3]{--bg-primary:#f0f8ff;--bg-secondary:#fff;--text-primary:#2c3e50;--text-secondary:#7f8c8d;--accent-color:#e74c3c;--border-color:#ecf0f1;--shadow:0 8px 16px #3498db33;--font-family:"Pacifico",cursive;--font-size-base:20px;--spacing-base:2rem;--border-radius:16px}*{transition:background-color .3s ease,color .3s ease,border-color .3s ease,box-shadow .3s ease}
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