:root{--primary-color:#6366f1;--primary-hover:#4f46e5;--secondary-color:#f8fafc;--accent-color:#10b981;--danger-color:#ef4444;--warning-color:#f59e0b;--text-primary:#1f2937;--text-secondary:#6b7280;--border-color:#e5e7eb;--background-light:#f9fafb;--background-white:#fff;--shadow-sm:0 1px 2px 0 rgb(0 0 0/0.05);--shadow-md:0 4px 6px -1px rgb(0 0 0/0.1),0 2px 4px -2px rgb(0 0 0/0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0/0.1),0 4px 6px -4px rgb(0 0 0/0.1);--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--transition-base:all 0.2s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:var(--text-primary);line-height:1.6}.app-container{min-height:100vh;padding:2rem 1rem}.main-content{max-width:1200px;margin:0 auto}.section-base{background:var(--background-white);border-radius:var(--radius-xl);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-lg);backdrop-filter:blur(10px)}.slide-down{animation:slideDown .3s ease-out}@keyframes slideDown{0%{opacity:0;max-height:0;transform:translateY(-10px)}to{opacity:1;max-height:500px;transform:translateY(0)}}.pulse{animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.btn-base{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:var(--radius-md);font-weight:600;font-size:.875rem;cursor:pointer;transition:var(--transition-base);text-decoration:none;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,var(--primary-color),#8b5cf6);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{background:var(--background-light);color:var(--text-primary);border:2px solid var(--border-color)}.btn-secondary:hover{background:var(--border-color)}.btn-icon{width:2.5rem;height:2.5rem;border-radius:50%;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;font-weight:600;transition:var(--transition-base)}.btn-add{background:var(--accent-color);color:#fff}.btn-add:hover:not(:disabled){background:#059669;transform:scale(1.05)}.btn-remove{background:var(--danger-color);color:#fff}.btn-remove:hover:not(:disabled){background:#dc2626;transform:scale(1.05)}.btn-icon:disabled{opacity:.5;cursor:not-allowed;transform:none}.input-base{width:100%;padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:var(--radius-md);font-size:.875rem;background:var(--background-white);transition:var(--transition-base)}.input-base:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(99,102,241,.1)}.select-base{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");background-position:right .5rem center;background-repeat:no-repeat;background-size:1.5rem 1.5rem;padding-right:2.5rem}.grid-auto-fit{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.grid-auto-fill{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:.5rem}.flex-center{justify-content:center}.flex-between,.flex-center{display:flex;align-items:center}.flex-between{justify-content:space-between}.flex-gap{display:flex;gap:1rem}.text-primary{color:var(--text-primary)}.text-secondary{color:var(--text-secondary)}.text-gradient{background:linear-gradient(135deg,var(--primary-color),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.font-semibold{font-weight:600}.font-bold{font-weight:700}.loading-spinner{width:1.5rem;height:1.5rem;border:2px solid transparent;border-top-color:currentcolor;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media (max-width:768px){.app-container{padding:1rem .5rem}.section-base{padding:1.5rem;margin-bottom:1.5rem}.grid-auto-fit{grid-template-columns:1fr}.flex-gap{flex-direction:column}.btn-base{width:100%;justify-content:center}}@media (max-width:640px){.grid-auto-fill{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--background-light)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.focus-ring:focus{outline:2px solid var(--primary-color);outline-offset:2px}.hover-lift:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.hover-scale:hover{transform:scale(1.02)}