/* ==========================================================
   Button Component
   ========================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-md);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  -webkit-user-select: none;
  user-select: none;
  min-height: 44px;
}

.btn:active {
  transform: scale(0.97);
}

/* --- Variants --- */

.btn-primary {
  background: var(--tg-theme-button-color);
  color: var(--tg-theme-button-text-color);
}

.btn-secondary {
  background: var(--tg-theme-secondary-bg-color);
  color: var(--tg-theme-text-color);
}

.btn-danger {
  background: var(--tg-theme-destructive-text-color);
  color: var(--tg-theme-button-text-color);
}

.btn-ghost {
  background: transparent;
  color: var(--tg-theme-button-color);
}

/* --- Sizes --- */

.btn-sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-lg);
  min-height: 52px;
}

/* --- Full width --- */

.btn-block {
  display: flex;
  width: 100%;
}

/* --- Disabled --- */

.btn:disabled,
.btn[disabled] {
  opacity: 0.4;
  pointer-events: none;
}