.btn{align-items:center;background:transparent;border:1px solid transparent;border-radius:var(--radius-md);color:var(--color-text);cursor:pointer;display:inline-flex;font:var(--text-label-strong);gap:var(--space-2);justify-content:center;line-height:1;min-height:2.625rem;padding:var(--space-3) var(--space-5);text-align:center;text-decoration:none;transition:color var(--transition-fast),background-color var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast)}.btn:focus-visible,.btn:hover{text-decoration:none}.btn:focus-visible{outline:2px solid currentColor;outline-offset:var(--space-1)}.btn:disabled,.btn[aria-disabled=true]{cursor:not-allowed;opacity:.55;pointer-events:none;transform:none}.btn--primary{background:var(--color-primary);border-color:var(--color-primary);box-shadow:var(--shadow-button);color:var(--color-text-inverse)}.btn--primary:focus-visible,.btn--primary:hover{background:var(--color-primary-hover);border-color:var(--color-primary-hover);box-shadow:var(--shadow-md);color:var(--color-text-inverse);transform:translateY(-1px)}.btn--secondary{background:var(--color-surface);border-color:var(--color-border);color:var(--color-text)}.btn--secondary:focus-visible,.btn--secondary:hover{background:var(--color-surface-secondary);border-color:var(--color-primary);color:var(--color-primary);transform:translateY(-1px)}.btn--ghost{background:transparent;border-color:var(--color-border);color:var(--color-text)}.btn--ghost:focus-visible,.btn--ghost:hover{background:var(--color-primary-soft);border-color:var(--color-primary);color:var(--color-primary)}.btn--full{width:100%}.btn__icon{flex:0 0 auto;height:1rem;transition:transform var(--transition-fast);width:1rem}.btn:focus-visible .btn__icon--trailing,.btn:hover .btn__icon--trailing{transform:translateX(2px)}.section--dark .btn--primary{background:var(--color-surface);border-color:var(--color-surface);box-shadow:none;color:var(--color-text)}.section--dark .btn--primary:focus-visible,.section--dark .btn--primary:hover{background:var(--color-surface-soft);border-color:var(--color-surface-soft);color:var(--color-text)}.section--dark .btn--ghost,.section--dark .btn--secondary{background:var(--color-light-transparent);border-color:var(--color-light-border);color:var(--color-text-inverse)}.section--dark .btn--ghost:focus-visible,.section--dark .btn--ghost:hover,.section--dark .btn--secondary:focus-visible,.section--dark .btn--secondary:hover{background:var(--color-light-transparent-hover);border-color:var(--color-light-border-hover);color:var(--color-text-inverse)}@media (prefers-reduced-motion:reduce){.btn,.btn__icon{transition:none}.btn:focus-visible,.btn:focus-visible .btn__icon,.btn:hover,.btn:hover .btn__icon{transform:none}}