/**
 * LabShop Button Components
 * Loading states, variants, and sizes
 */

/* ========== Base Button ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  min-height: var(--touch-target-min);
  white-space: nowrap;
}

.btn:hover {
  background: var(--color-bg-hover);
}

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

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

/* ========== Button Variants ========== */

/* Primary - Red/Coral */
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-button-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Secondary - Blue */
.btn-secondary {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-button);
}

.btn-secondary:hover {
  background: var(--color-secondary-hover);
  border-color: var(--color-secondary-hover);
}

/* Success - Green */
.btn-success {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

.btn-success:hover {
  background: #15803d;
  border-color: #15803d;
}

/* Warning - Yellow */
.btn-warning {
  background: var(--color-warning);
  color: #fff;
  border-color: var(--color-warning);
}

.btn-warning:hover {
  background: #d97706;
  border-color: #d97706;
}

/* Danger - Red */
.btn-danger {
  background: var(--color-error);
  color: #fff;
  border-color: var(--color-error);
}

.btn-danger:hover {
  background: #dc2626;
  border-color: #dc2626;
}

/* Ghost/Outline */
.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-bg-hover);
}

/* Light (for dark backgrounds) */
.btn-light {
  background: #fff;
  color: var(--color-text);
  border-color: #fff;
  box-shadow: var(--shadow-lg);
}

.btn-light:hover {
  background: #f8fafc;
}

/* Outline Light (for dark backgrounds) */
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ========== Button Sizes ========== */
.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

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

/* Full width */
.btn-block {
  width: 100%;
}

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

.btn.loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

/* For non-primary buttons, darker spinner */
.btn.loading:not(.btn-primary):not(.btn-secondary):not(.btn-success):not(.btn-warning):not(.btn-danger)::after {
  border-color: var(--color-border);
  border-top-color: var(--color-text);
}

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

/* ========== Icon Button ========== */
.btn-icon {
  padding: var(--space-sm);
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
}

.btn-icon.btn-sm {
  min-width: 36px;
  min-height: 36px;
}

/* ========== Icon Button (Text-less) ========== */
.icon-btn {
  border: 0;
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  font-size: var(--font-size-lg);
}

.icon-btn:hover {
  background: var(--color-border);
  color: var(--color-text);
}

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

/* Icon button variants */
.icon-btn.icon-del {
  background: var(--color-error-light);
  color: #b91c1c;
}

.icon-btn.icon-del:hover {
  background: var(--color-error-border);
}

.icon-btn.icon-edit {
  background: var(--color-info-light);
  color: #0369a1;
}

.icon-btn.icon-edit:hover {
  background: var(--color-info-border);
}

.icon-btn.icon-success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.icon-btn.icon-success:hover {
  background: var(--color-success-border);
}