:root{--color-primary:#0066ff;--color-primary-dark:#0052cc;--color-primary-light:#3385ff;--color-secondary:#00d4aa;--color-accent:#ff6b35;--color-bg:#ffffff;--color-bg-secondary:#f8f9fa;--color-bg-tertiary:#f0f2f5;--color-surface:#ffffff;--color-surface-raised:#ffffff;--color-border:#e2e8f0;--color-border-light:#f1f5f9;--color-text:#0f172a;--color-text-secondary:#475569;--color-text-muted:#94a3b8;--color-text-inverse:#ffffff;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--color-info:#3b82f6;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -1px rgba(0,0,0,0.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -2px rgba(0,0,0,0.05);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.1),0 10px 10px -5px rgba(0,0,0,0.04);--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:9999px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--space-20:80px;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:"SF Mono","Fira Code","Fira Mono","Roboto Mono",monospace;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--text-5xl:3rem;--font-normal:400;--font-medium:500;--font-semibold:600;--font-bold:700;--leading-tight:1.25;--leading-normal:1.5;--leading-relaxed:1.75;--transition-fast:150ms ease;--transition-base:200ms ease;--transition-slow:300ms ease;--z-dropdown:100;--z-sticky:200;--z-overlay:300;--z-modal:400;--z-toast:500}[data-theme=dark]{--color-bg:#0f172a;--color-bg-secondary:#1e293b;--color-bg-tertiary:#334155;--color-surface:#1e293b;--color-surface-raised:#334155;--color-border:#334155;--color-border-light:#1e293b;--color-text:#f1f5f9;--color-text-secondary:#94a3b8;--color-text-muted:#64748b;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.3);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.4);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.4)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--color-text);background-color:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-slow),color var(--transition-slow)}img,video{max-width:100%;height:auto;display:block}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-dark)}button{cursor:pointer;font-family:inherit;border:none;background:none}input,select,textarea{font-family:inherit;font-size:inherit}ol,ul{list-style:none}h1,h2,h3,h4,h5,h6{font-weight:var(--font-bold);line-height:var(--leading-tight);color:var(--color-text)}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-6)}.container--wide{max-width:1400px}.container--narrow{max-width:800px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border-width:0}.btn,.sr-only{white-space:nowrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:var(--font-semibold);line-height:1;transition:all var(--transition-fast);cursor:pointer;border:2px solid transparent}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background-color:var(--color-primary);color:var(--color-text-inverse);border-color:var(--color-primary)}.btn--primary:hover:not(:disabled){background-color:var(--color-primary-dark);border-color:var(--color-primary-dark);color:var(--color-text-inverse)}.btn--secondary{background-color:transparent;color:var(--color-primary);border-color:var(--color-primary)}.btn--secondary:hover:not(:disabled){background-color:var(--color-primary);color:var(--color-text-inverse)}.btn--ghost{background-color:transparent;color:var(--color-text-secondary);border-color:transparent}.btn--ghost:hover:not(:disabled){background-color:var(--color-bg-tertiary);color:var(--color-text)}.btn--danger{background-color:var(--color-error);color:white;border-color:var(--color-error)}.btn--sm{padding:var(--space-2) var(--space-4);font-size:var(--text-xs)}.btn--lg{padding:var(--space-4) var(--space-8);font-size:var(--text-base)}.form-group{display:flex;flex-direction:column;gap:var(--space-2);margin-bottom:var(--space-5)}.form-label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--color-text-secondary)}.form-input,.form-select,.form-textarea{width:100%;padding:var(--space-3) var(--space-4);border:1.5px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text);background-color:var(--color-surface);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(0,102,255,.1)}.form-input::placeholder,.form-textarea::placeholder{color:var(--color-text-muted)}.form-textarea{resize:vertical;min-height:120px}.form-error{font-size:var(--text-xs);color:var(--color-error)}.card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-sm)}.card--elevated{box-shadow:var(--shadow-md);border:none}.badge{display:inline-flex;align-items:center;padding:2px var(--space-2);border-radius:var(--radius-full);font-size:var(--text-xs);font-weight:var(--font-semibold)}.badge--success{background-color:#d1fae5;color:#065f46}.badge--warning{background-color:#fef3c7;color:#92400e}.badge--error{background-color:#fee2e2;color:#991b1b}.badge--info{background-color:#dbeafe;color:#1e40af}.badge--neutral{background-color:var(--color-bg-tertiary);color:var(--color-text-secondary)}.avatar{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-full);background-color:var(--color-primary);color:white;font-weight:var(--font-semibold);overflow:hidden;flex-shrink:0}.avatar--sm{width:32px;height:32px;font-size:var(--text-xs)}.avatar--md{width:40px;height:40px;font-size:var(--text-sm)}.avatar--lg{width:56px;height:56px;font-size:var(--text-lg)}.avatar--xl{width:80px;height:80px;font-size:var(--text-2xl)}.avatar img{width:100%;height:100%;object-fit:cover}.avatar-wrapper{position:relative;display:inline-flex}.online-dot{position:absolute;bottom:1px;right:1px;width:10px;height:10px;border-radius:var(--radius-full);background-color:var(--color-success);border:2px solid var(--color-surface)}.spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.toast-container{position:fixed;bottom:var(--space-6);right:var(--space-6);z-index:var(--z-toast);flex-direction:column}.toast,.toast-container{display:flex;gap:var(--space-3)}.toast{align-items:center;padding:var(--space-4) var(--space-5);border-radius:var(--radius-lg);background-color:var(--color-surface);box-shadow:var(--shadow-xl);border:1px solid var(--color-border);min-width:300px;max-width:400px;animation:slideIn .3s ease}@keyframes slideIn{0%{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}.divider{height:1px;background-color:var(--color-border);margin:var(--space-6) 0}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background-color:var(--color-border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background-color:var(--color-text-muted)}@media (max-width:768px){.container{padding:0 var(--space-4)}.toast-container{bottom:var(--space-4);right:var(--space-4);left:var(--space-4)}.toast{min-width:unset;max-width:unset;width:100%}}