.btn{justify-content:center;align-items:center;gap:var(--space-2);font-family:var(--font-sans);font-weight:var(--font-medium);border-radius:var(--radius-md);cursor:pointer;transition:background var(--motion-fast), border-color var(--motion-fast), color var(--motion-fast), box-shadow var(--motion-fast);white-space:nowrap;-webkit-user-select:none;user-select:none;border:1px solid #0000;display:inline-flex}.btn:focus-visible{box-shadow:var(--focus-ring);outline:none}.btn:disabled{cursor:not-allowed;opacity:.5}.btn--full{width:100%}.btn--sm{height:28px;padding:0 var(--space-3);font-size:var(--text-sm)}.btn--md{height:36px;padding:0 var(--space-4);font-size:var(--text-base)}.btn--lg{height:44px;padding:0 var(--space-5);font-size:var(--text-md)}.btn--primary{background:var(--brand-primary);color:#fff}.btn--primary:hover:not(:disabled){background:var(--brand-primary-hover)}.btn--primary:active:not(:disabled){background:var(--brand-primary-active)}.btn--secondary{border-color:var(--border-default);color:var(--text-primary);background:0 0}.btn--secondary:hover:not(:disabled){background:var(--surface-card-hover);border-color:var(--border-strong)}.btn--secondary:active:not(:disabled){background:var(--surface-overlay)}.btn--ghost{color:var(--text-secondary);background:0 0}.btn--ghost:hover:not(:disabled){background:var(--surface-card-hover);color:var(--text-primary)}.btn--ghost:active:not(:disabled){background:var(--surface-overlay)}.btn--danger{background:var(--status-fail);color:#fff}.btn--danger:hover:not(:disabled){background:#b91c1c}.btn--danger:active:not(:disabled){background:#991b1b}.btn--loading{cursor:progress}.btn__spinner{animation:.7s linear infinite btn-spin}@keyframes 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