.ui-button{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);border:1px solid transparent;border-radius:var(--radius-md);font-family:var(--font-family-sans);font-weight:var(--font-weight-medium);line-height:var(--line-height-tight);cursor:pointer;transition:all var(--transition-fast);position:relative;white-space:nowrap;-webkit-user-select:none;user-select:none}.ui-button:focus-visible{outline:none;box-shadow:var(--focus-ring)}.ui-button:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.ui-button--default{background-color:var(--primary);color:var(--primary-foreground);box-shadow:var(--shadow-btn-primary)}.ui-button--default:hover:not(:disabled){background-color:var(--primary-hover);box-shadow:var(--shadow-btn-primary-hover);transform:var(--transform-lift-xs)}.ui-button--default:active:not(:disabled){background-color:var(--primary-dark);transform:none}.ui-button--secondary{background-color:var(--secondary);color:var(--secondary-foreground)}.ui-button--secondary:hover:not(:disabled){background-color:var(--secondary-hover);transform:var(--transform-lift-xs)}.ui-button--secondary:active:not(:disabled){background-color:var(--secondary-dark);transform:none}.ui-button--outline{background-color:transparent;color:var(--text-primary);border-color:var(--border-input)}.ui-button--outline:hover:not(:disabled){background-color:var(--bg-card-hover);border-color:var(--border-dark)}.ui-button--outline:active:not(:disabled){background-color:var(--muted)}.ui-button--ghost{background-color:transparent;color:var(--text-primary)}.ui-button--ghost:hover:not(:disabled){background-color:var(--neutral-bg-hover)}.ui-button--ghost:active:not(:disabled){background-color:var(--neutral-bg-medium)}.ui-button--destructive{background-color:var(--destructive);color:var(--destructive-foreground);box-shadow:var(--shadow-btn-danger)}.ui-button--destructive:hover:not(:disabled){background-color:var(--error-hover);box-shadow:var(--shadow-btn-danger-hover);transform:var(--transform-lift-xs)}.ui-button--destructive:active:not(:disabled){background-color:var(--error-dark);transform:none}.ui-button--link{background-color:transparent;color:var(--text-link);text-decoration:none;border:none;padding:0;height:auto}.ui-button--link:hover:not(:disabled){text-decoration:underline}.ui-button--xs{height:var(--size-button-xs);padding:0 var(--space-2);font-size:var(--font-size-xs)}.ui-button--sm{height:var(--size-button-sm);padding:0 var(--space-3);font-size:var(--font-size-sm)}.ui-button--md{height:var(--size-button-md);padding:0 var(--space-4);font-size:var(--font-size-sm)}.ui-button--lg{height:var(--size-button-lg);padding:0 var(--space-6);font-size:var(--font-size-base)}.ui-button--icon{height:var(--size-button-md);width:var(--size-button-md);padding:0}.ui-button--loading{cursor:wait}.ui-button__spinner{position:absolute;width:16px;height:16px;border:2px solid currentColor;border-top-color:transparent;border-radius:var(--radius-full);animation:ui-button-spin .6s linear infinite}.ui-button__content{display:inline-flex;align-items:center;gap:var(--space-2)}.ui-button__content--hidden{visibility:hidden;display:inline-flex;align-items:center;gap:var(--space-2)}@keyframes ui-button-spin{to{transform:rotate(360deg)}}