.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);font-family:var(--font-sans);font-weight:500;letter-spacing:.1em;text-transform:uppercase;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);position:relative;overflow:hidden;text-decoration:none}.btn:disabled{opacity:.4;cursor:not-allowed}.btn--sm{padding:.625rem 1.25rem;font-size:.625rem}.btn--md{padding:.875rem 1.75rem;font-size:.6875rem}.btn--lg{padding:1rem 2.25rem;font-size:.75rem}.btn--xl{padding:1.25rem 3rem;font-size:.75rem}.btn--full-width{width:100%}.btn--primary{background:var(--color-dark);color:var(--color-cream);box-shadow:var(--shadow-sm)}.btn--primary:hover:not(:disabled){background:var(--color-dark-soft);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn--secondary{background:var(--color-bg-elevated);color:var(--color-dark);border:1px solid var(--color-border)}.btn--secondary:hover:not(:disabled){border-color:var(--color-dark);background:var(--color-bg-secondary)}.btn--ghost{background:transparent;color:var(--color-text-secondary)}.btn--ghost:hover:not(:disabled){color:var(--color-dark);background:var(--color-bg-secondary)}.btn--medical{background:var(--color-medical-landing);color:white;box-shadow:var(--shadow-sm)}.btn--medical:hover:not(:disabled){background:var(--color-medical-landing);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn--aesthetics{background:var(--color-aesthetics-accent);color:white;box-shadow:var(--shadow-sm)}.btn--aesthetics:hover:not(:disabled){background:var(--color-aesthetics-primary);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn--lifelink{background:#000000;color:white;box-shadow:var(--shadow-sm);position:relative}.btn--lifelink .btn-text{transition:all var(--transition-base);color:white}.btn--lifelink:hover:not(:disabled){background:#ffffff;border:1px solid #000000;box-shadow:var(--shadow-sm);transform:none}.btn--lifelink:hover:not(:disabled) .btn-text{background:linear-gradient(135deg,#7B2CBF,#5A189A 25%,#00BFFF 75%,#00D4FF);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btn--lifelink:hover:not(:disabled) .btn-icon{color:#000000}.btn--lifelink:hover:not(:disabled) .btn-icon svg{color:#000000;stroke:#000000}.btn-icon{display:flex;align-items:center;justify-content:center;transition:transform var(--transition-fast)}.btn-icon svg{width:1em;height:1em}.btn:hover .btn-icon--right{transform:translateX(4px)}.btn:hover .btn-icon--left{transform:translateX(-4px)}.btn--lifelink:hover .btn-icon--left,.btn--lifelink:hover .btn-icon--right{transform:none}.btn-loader{width:1em;height:1em;border:1.5px solid transparent;border-top-color:currentcolor;border-radius:50%;animation:btn-spin .8s linear infinite}@keyframes btn-spin{to{transform:rotate(1turn)}}