/**
 * Button Component System
 * Based on Studio Cosmic North Design System
 */

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

/* Primary Button (Purple Gradient) */
.btn-primary {
  background: linear-gradient(135deg, var(--purple-600) 0%, var(--indigo-500) 100%);
  color: white;
  border-color: transparent;
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg), var(--glow-purple-lg);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.3);
}

/* Secondary Button (Outline) */
.btn-secondary {
  background: transparent;
  color: var(--purple-400);
  border-color: var(--purple-400);
}

.btn-secondary:hover {
  background: rgba(139, 92, 246, 0.1);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* Danger Button (Red) */
.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
  color: white;
}

.btn-danger:hover {
  box-shadow: var(--shadow-lg), 0 0 20px rgba(239, 68, 68, 0.3);
  transform: translateY(-2px);
}

/* Success Button (Green) */
.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
  color: white;
}

.btn-success:hover {
  box-shadow: var(--shadow-lg), 0 0 20px rgba(16, 185, 129, 0.3);
  transform: translateY(-2px);
}

/* Ghost Button (Transparent) */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

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

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

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-h6);
}

/* Icon-only Button */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
}

.btn-icon-sm {
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: var(--text-sm);
}

.btn-icon-lg {
  width: 48px;
  height: 48px;
  padding: 0;
}

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

/* Button Group */
.btn-group {
  display: inline-flex;
  gap: var(--space-2);
}

.btn-group .btn {
  margin: 0;
}

/* Disabled State */
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn:disabled:hover,
.btn.disabled:hover {
  transform: none !important;
  box-shadow: none !important;
}

/* 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 currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

/* Button with Icon */
.btn svg,
.btn i {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-sm svg,
.btn-sm i {
  width: 14px;
  height: 14px;
}

.btn-lg svg,
.btn-lg i {
  width: 20px;
  height: 20px;
}