:root{--color-primary: #6366f1;--color-primary-dark: #4f46e5;--color-secondary: #ec4899;--color-background: #0f172a;--color-surface: #1e293b;--color-surface-light: #334155;--color-text: #f1f5f9;--color-text-muted: #cbd5e1;--color-border: #475569;--color-success: #10b981;--color-error: #ef4444;--color-warning: #f59e0b;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: 1rem;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .2s cubic-bezier(.4, 0, .2, 1);--transition-slow: .3s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#0f172a,#1e293b);color:var(--color-text);line-height:1.6;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:var(--spacing-sm)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.75rem}h4{font-size:1.5rem}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}header{background:#1e293bcc;backdrop-filter:blur(10px);border-bottom:1px solid var(--color-border);padding:var(--spacing-md) 0;position:sticky;top:0;z-index:100}header nav{display:flex;justify-content:space-between;align-items:center}header .logo{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}header .nav-links{display:flex;gap:var(--spacing-md);list-style:none}header .nav-links a{color:var(--color-text-muted);text-decoration:none;transition:color var(--transition-base);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm)}header .nav-links a:hover,header .nav-links a.active{color:var(--color-primary);background:#6366f11a}.btn{display:inline-block;padding:var(--spacing-xs) var(--spacing-md);border-radius:var(--radius-md);border:none;font-weight:600;cursor:pointer;transition:all var(--transition-base);text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-surface-light)}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--spacing-md);box-shadow:var(--shadow-md);border:1px solid var(--color-border);transition:transform var(--transition-base),box-shadow var(--transition-base)}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl)}.badge{display:inline-block;padding:.25rem .75rem;border-radius:9999px;font-size:.875rem;font-weight:600}.badge-quiz{background:#6366f133;color:var(--color-primary)}.badge-poll{background:#ec489933;color:var(--color-secondary)}.badge-fact{background:#10b98133;color:var(--color-success)}input,textarea{width:100%;padding:var(--spacing-sm);border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface-light);color:var(--color-text);font-family:inherit;font-size:1rem;transition:border-color var(--transition-base)}input:focus,textarea:focus{outline:none;border-color:var(--color-primary)}label{display:block;margin-bottom:var(--spacing-xs);font-weight:600;color:var(--color-text-muted)}.grid{display:grid;gap:var(--spacing-md)}.grid-2{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.grid-3{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}.progress-bar{width:100%;height:.5rem;background:var(--color-surface-light);border-radius:9999px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));transition:width var(--transition-slow)}.loading{display:inline-block;width:1rem;height:1rem;border:2px solid var(--color-surface-light);border-top-color:var(--color-primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn var(--transition-slow) ease-out}@media(max-width:768px){h1{font-size:2rem}h2{font-size:1.75rem}header .nav-links{gap:var(--spacing-sm)}.grid-2,.grid-3{grid-template-columns:1fr}}.text-center{text-align:center}.text-muted{color:var(--color-text-muted)}.mt-1{margin-top:var(--spacing-sm)}.mt-2{margin-top:var(--spacing-md)}.mb-1{margin-bottom:var(--spacing-sm)}.mb-2{margin-bottom:var(--spacing-md)}.gap-1{gap:var(--spacing-sm)}.gap-2{gap:var(--spacing-md)}