/* ============================================
   BUTTON COMPONENT STYLES (CSS Module)
   ============================================ */

/* Base Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-body-md);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal) var(--timing-ease-out);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  outline: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
  background-color: #7a2ce5;
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
}

/* Secondary Button */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-secondary:active:not(:disabled) {
  transform: scale(0.98);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-text-primary);
}

.btn-ghost:active:not(:disabled) {
  transform: scale(0.98);
}

/* Button Sizes */
.btn-xs {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-body-xs);
}

.btn-sm {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-body-sm);
}

.btn-md {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-body-md);
}

.btn-lg {
  padding: var(--spacing-xl) var(--spacing-2xl);
  font-size: var(--font-size-h5);
  border-radius: var(--border-radius-lg);
}

.btn-full {
  width: 100%;
}

/* Button Groups */
.btn-group {
  display: inline-flex;
  gap: var(--spacing-sm);
}

.btn-group-block {
  display: flex;
  gap: var(--spacing-sm);
}

/* Button with Icon */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
}

/* Loading State */
.btn-loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn-loading::after {
  content: '';
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-left: var(--spacing-sm);
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Responsive Button */
@media (max-width: 768px) {
  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-body-sm);
  }

  .btn-lg {
    padding: var(--spacing-lg) var(--spacing-xl);
  }
}

@media (max-width: 393px) {
  .btn-full {
    width: 100%;
  }

  .btn-group-block {
    flex-direction: column;
  }
}