/* Button Styles */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary-500);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--color-secondary-500);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Outline Button */
.btn-outline {
  background-color: transparent;
  color: var(--color-primary-500);
  border: 2px solid var(--color-primary-500);
}

.btn-outline:hover {
  background-color: var(--color-primary-500);
  color: #ffffff;
}

/* White Outline (for dark backgrounds) */
.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border: 2px solid #ffffff;
}

.btn-outline-white:hover {
  background-color: #ffffff;
  color: var(--color-primary-500);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: #ffffff;
  border: 2px solid #ffffff;
}

.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary-500);
  color: var(--color-primary-500);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-xl);
}

/* Full Width Button */
.btn-block {
  width: 100%;
  display: flex;
}

/* Disabled State */
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Icon Buttons */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--border-radius-full);
}

/* Loading State */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid #ffffff;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

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