.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-lg);border-radius:var(--radius-md);font-weight:500;font-family:'Space Grotesk',sans-serif;font-size:1rem;transition:all var(--transition-normal);position:relative;overflow:hidden;border:2px solid transparent;cursor:pointer;text-decoration:none;line-height:1}.btn:focus{outline:2px solid var(--primary-blue);outline-offset:2px}.btn:disabled{opacity:0.6;cursor:not-allowed;transform:none!important}.btn-small{padding:var(--space-sm) var(--space-md);font-size:0.875rem}.btn-large{padding:var(--space-lg) var(--space-xl);font-size:1.125rem}.btn-xlarge{padding:var(--space-xl) var(--space-2xl);font-size:1.25rem}.btn-primary{background:var(--primary-blue);color:white;border-color:var(--primary-blue)}.btn-primary:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:transparent;color:var(--text-dark);border-color:var(--secondary-border)}.btn-secondary:hover:not(:disabled){border-color:var(--primary-blue);color:var(--primary-blue);transform:translateY(-2px)}.btn-outline{background:transparent;color:var(--primary-blue);border-color:var(--primary-blue)}.btn-outline:hover:not(:disabled){background:var(--primary-blue);color:white;transform:translateY(-2px)}.btn-ghost{background:transparent;color:var(--text-soft);border-color:transparent}.btn-ghost:hover:not(:disabled){background:var(--primary-blue-light);color:var(--primary-blue)}.btn-success{background:var(--success);color:white;border-color:var(--success)}.btn-success:hover:not(:disabled){background:#24b563;border-color:#24b563;transform:translateY(-2px)}.btn-warning{background:var(--warning);color:var(--text-dark);border-color:var(--warning)}.btn-warning:hover:not(:disabled){background:#e6b435;border-color:#e6b435;transform:translateY(-2px)}.btn-error{background:var(--error);color:white;border-color:var(--error)}.btn-error:hover:not(:disabled){background:#e04a4f;border-color:#e04a4f;transform:translateY(-2px)}.btn.loading{pointer-events:none;opacity:0.8}.btn.loading::after{content:'';width:16px;height:16px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite;margin-left:var(--space-sm)}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}.btn-full{width:100%}.btn-icon{width:40px;height:40px;padding:0;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}.btn-icon.btn-small{width:32px;height:32px}.btn-icon.btn-large{width:48px;height:48px}.btn-group{display:inline-flex;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border)}.btn-group .btn{border-radius:0;border:none;margin:0}.btn-group .btn:not(:last-child){border-right:1px solid var(--border)}