/* ==========================================================
   components.css — Buttons, Tags, Cards, Inputs, Toggles
   ========================================================== */

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
  position: relative;
  overflow: hidden;
}

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

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

.btn .icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

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

.btn-primary:active {
  background: var(--color-primary-dark);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn-outline:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

/* Danger */
.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
  border-color: var(--color-danger);
}

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

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  padding: 6px 10px;
}

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

/* Link */
.btn-link {
  background: transparent;
  color: var(--color-primary);
  border: none;
  padding: 4px 8px;
  font-weight: var(--font-weight-medium);
}

.btn-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* Sizes */
.btn-sm {
  padding: 5px 10px;
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: 12px 24px;
  font-size: var(--font-size-md);
}

.btn-block {
  width: 100%;
}

/* Icon-only buttons */
.btn-icon {
  padding: 6px;
  min-width: 32px;
  min-height: 32px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-muted);
  border: none;
}

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

.btn-icon-sm {
  padding: 4px;
  min-width: 24px;
  min-height: 24px;
}

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

/* Button Loading */
.btn.loading .btn-text {
  visibility: hidden;
}

.btn.loading .btn-loader {
  display: inline-flex !important;
  align-items: center;
  gap: var(--space-xs);
}

.btn-loader {
  display: none;
  align-items: center;
  gap: var(--space-xs);
}

.spinner-sm {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

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

/* ========== BADGES ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: 10px;
  white-space: nowrap;
  line-height: 1.5;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

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

.badge-warning {
  background: var(--color-warning-light);
  color: #b37400;
}

.badge-danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.badge-info {
  background: var(--color-info-light);
  color: #0a8a8a;
}

.badge-purple {
  background: var(--color-purple-light);
  color: var(--color-purple);
}

.badge-neutral {
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
}

/* ========== TAGS ========== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  line-height: 1.6;
}

.tag-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

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

.tag-warning {
  background: var(--color-warning-light);
  color: #b37400;
}

.tag-danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.tag-info {
  background: var(--color-info-light);
  color: #0a8a8a;
}

.tag-purple {
  background: var(--color-purple-light);
  color: var(--color-purple);
}

.tag-neutral {
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
}

.tag-more {
  background: var(--color-bg-hover);
  color: var(--color-text-muted);
  font-style: italic;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

/* ========== CARDS ========== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-base);
  border-bottom: 1px solid var(--color-border-light);
}

.card-body {
  padding: var(--space-base);
}

/* ========== FORM INPUTS ========== */
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 8px 12px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  line-height: 1.5;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-focus);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-placeholder);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--color-bg-disabled);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.form-input.input-error,
.form-select.input-error,
.form-textarea.input-error {
  border-color: var(--color-border-error);
  box-shadow: var(--shadow-error);
}

/* Select */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
  cursor: pointer;
}

/* Small variants */
.form-input-sm,
.form-select-sm {
  padding: 5px 8px;
  font-size: var(--font-size-sm);
}

.form-select-sm {
  padding-right: 28px;
}

/* Full width */
.input-full {
  width: 100%;
}

/* Form Group */
.form-group {
  margin-bottom: var(--space-base);
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.form-group-inline {
  margin-bottom: var(--space-md);
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-base);
}

/* Hints */
.form-hint,
.form-field-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  line-height: var(--line-height-base);
}

/* Required */
.required-marker,
.required {
  color: var(--color-danger);
  margin-left: 2px;
  font-weight: var(--font-weight-normal);
}

/* ========== TOGGLE ========== */
.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  user-select: none;
}

.toggle-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
  background: var(--color-border);
  border-radius: 10px;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.toggle-input:checked + .toggle-switch {
  background: var(--color-primary);
}

.toggle-input:checked + .toggle-switch::after {
  transform: translateX(16px);
}

.toggle-input:focus-visible + .toggle-switch {
  box-shadow: var(--shadow-focus);
}

/* ========== USER AVATAR ========== */
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  text-transform: uppercase;
}

.user-avatar-sm {
  width: 28px;
  height: 28px;
  font-size: var(--font-size-xs);
}

.user-avatar-lg {
  width: 48px;
  height: 48px;
  font-size: var(--font-size-lg);
}

/* ========== EMPTY STATE ========== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xxl) var(--space-lg);
  text-align: center;
  color: var(--color-text-muted);
}

.empty-state .icon {
  margin-bottom: var(--space-base);
  opacity: 0.4;
}

.empty-state h3 {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.empty-state p {
  font-size: var(--font-size-sm);
  max-width: 300px;
}

/* ========== COUNT BADGE ========== */
.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border-radius: 10px;
}

/* ========== PROGRESS BAR ========== */
.progress-bar-wrapper {
  width: 100%;
  height: 6px;
  background: var(--color-bg-hover);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width var(--transition-slow);
}

.progress-bar-success {
  background: var(--color-success);
}

.progress-bar-warning {
  background: var(--color-warning);
}

.progress-bar-danger {
  background: var(--color-danger);
}

/* ========== CONDITIONAL CONFIG ========== */
.conditional-config {
  padding-left: var(--space-base);
  border-left: 2px solid var(--color-border-light);
  margin-top: var(--space-sm);
}

/* ========== VALIDATION SUMMARY ========== */
.validation-summary {
  background: var(--color-danger-light);
  border: 1px solid rgba(245, 34, 45, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-base);
  margin-bottom: var(--space-lg);
  color: var(--color-danger);
  font-size: var(--font-size-sm);
}

.validation-summary ul {
  margin-top: var(--space-xs);
  padding-left: var(--space-base);
  list-style: disc;
}

.validation-summary li {
  margin-bottom: var(--space-xs);
}