:root{--primary: #000;--secondary: #666;--accent: #0071e3;--bg: #f5f5f7;--card: #ffffff;--border: #d5d5d7;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", system-ui, sans-serif;--font-size-base: 1rem;--font-size-sm: .875rem;--font-size-lg: 1.125rem;--font-weight-regular: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--border-radius: 12px;--border-radius-sm: 8px;--border-radius-lg: 16px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease;--z-navbar: 100;--z-dropdown: 200;--z-modal: 300}@media (prefers-color-scheme: dark){:root{--primary: #f5f5f7;--secondary: #999;--bg: #1d1d1f;--card: #222222;--border: #424245}}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;width:100%}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--primary);background-color:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:var(--font-weight-semibold);letter-spacing:-.5px}h1{font-size:2rem;line-height:1.2}h2{font-size:1.5rem;line-height:1.3}h3{font-size:1.25rem;line-height:1.4}h4{font-size:1.1rem;line-height:1.4}h5{font-size:1rem;line-height:1.5}h6{font-size:.875rem;line-height:1.5}p{margin-bottom:1rem}a{color:var(--accent);text-decoration:none;transition:opacity var(--transition-base)}a:hover{opacity:.8}input,textarea,select{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--primary);background-color:var(--card)}input:focus,textarea:focus,select:focus{outline:none}button{font-family:var(--font-family);cursor:pointer;transition:all var(--transition-base)}button:active{transform:scale(.98)}ul,ol{padding-left:1.5rem}ul li,ol li{margin-bottom:.5rem}code,pre{font-family:Monaco,Menlo,Ubuntu Mono,monospace;background-color:var(--bg);border-radius:var(--border-radius-sm);padding:.25rem .5rem}pre{padding:1rem;overflow-x:auto;margin-bottom:1rem}table{width:100%;border-collapse:collapse;margin-bottom:1rem}th,td{padding:.75rem;text-align:left;border-bottom:1px solid var(--border)}th{background-color:var(--bg);font-weight:var(--font-weight-semibold)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px;-webkit-transition:background var(--transition-base);transition:background var(--transition-base)}::-webkit-scrollbar-thumb:hover{background:var(--secondary)}::selection{background-color:var(--accent);color:#fff}::placeholder{color:var(--secondary);opacity:.7}@media (max-width: 1024px){html{font-size:15px}h1{font-size:1.75rem}h2{font-size:1.35rem}}@media (max-width: 768px){html{font-size:16px}:root{--spacing-lg: 1rem;--spacing-xl: 1.5rem;--spacing-2xl: 2rem;--border-radius: 10px}h1{font-size:1.5rem}h2{font-size:1.25rem}h3{font-size:1.1rem}p{font-size:.95rem}}@media (max-width: 480px){html{font-size:14px}:root{--spacing-md: .75rem;--spacing-lg: .9rem;--spacing-xl: 1.2rem;--border-radius: 8px}h1{font-size:1.3rem}h2{font-size:1.1rem}h3{font-size:1rem}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.text-center{text-align:center}.text-right{text-align:right}.text-muted{color:var(--secondary)}.mt-0{margin-top:0!important}.mb-0{margin-bottom:0!important}.hidden{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}