.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);font-size:var(--text-sm);font-weight:var(--weight-semibold);line-height:1;border-radius:var(--radius-md);cursor:pointer;border:none;transition:all var(--transition-base);white-space:nowrap}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--gradient-accent);color:white;box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){box-shadow:var(--glow-green);filter:brightness(1.08)}.btn-secondary{background:var(--surface-glass);color:var(--text-primary);border:1px solid var(--surface-border)}.btn-secondary:hover:not(:disabled){background:var(--surface-glass-hover);border-color:var(--accent)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){background:var(--ghost-hover-bg);color:var(--text-primary)}.btn-danger{background:var(--error-bg);color:var(--error-text);border:1px solid var(--error-border)}.btn-sm{padding:var(--space-2) var(--space-3);font-size:var(--text-xs)}.btn-full{width:100%}.btn-icon-element{display:flex;align-items:center;justify-content:center}