/*
 * Reusable design-system components (Phase 8A, раздел 7 задачи).
 * Buttons, Inputs, Cards, Status badges, Modal, Icons.
 */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--control-height-md);
  padding: 0 var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-value);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-base), opacity var(--transition-base);
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary — translucent/glassy surface, тонкая border, мягкий blue glow (раздел 7 задачи) */
.btn-primary {
  color: var(--color-text-primary);
  background: linear-gradient(180deg, rgba(61, 139, 255, 0.35), rgba(61, 139, 255, 0.22));
  border-color: rgba(111, 177, 255, 0.4);
  box-shadow: var(--shadow-accent-soft);
  backdrop-filter: blur(6px);
}

.btn-primary:hover {
  background: linear-gradient(180deg, rgba(61, 139, 255, 0.45), rgba(61, 139, 255, 0.28));
}

/* Secondary — dark graphite, НЕ blue (раздел 5/7 задачи) */
.btn-secondary {
  color: var(--color-text-secondary);
  background: var(--color-graphite);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-elevated);
}

.btn-full {
  width: 100%;
}

.btn-loading {
  position: relative;
  color: transparent !important;
}

.btn-loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  animation: spin 700ms linear infinite;
}

/* ---------- Inputs ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.field-label {
  font-size: var(--font-size-label);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.field-label.required::after {
  content: " *";
  color: var(--color-danger);
}

.input, .select {
  min-height: var(--control-height-md);
  padding: 0 var(--space-3);
  background: var(--color-graphite);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-value);
  width: 100%;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.input::placeholder {
  color: var(--color-text-muted);
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(61, 139, 255, 0.25);
}

.input.error, .select.error {
  border-color: var(--color-danger);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--touch-target-min);
}

.checkbox-row input[type="checkbox"] {
  width: 22px;
  height: 22px;
  accent-color: var(--color-accent);
}

.field-error {
  font-size: var(--font-size-helper);
  color: var(--color-danger);
}

.field-helper {
  font-size: var(--font-size-helper);
  color: var(--color-text-muted);
}

/* ---------- Cards ---------- */
.card {
  background: var(--color-graphite);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.card + .card {
  margin-top: var(--space-3);
}

.card-title {
  color: var(--color-text-primary);
  font-weight: 600;
}

.card-subtext {
  color: var(--color-text-secondary);
  font-size: var(--font-size-helper);
}

.card-tappable {
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.card-tappable:hover, .card-tappable:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-surface-elevated);
}

/* ---------- Status badges (раздел 7/18 задачи) ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-helper);
  font-weight: 600;
  white-space: nowrap;
}

.badge-pending { background: var(--status-pending-bg); color: var(--status-pending-fg); }
.badge-approved { background: var(--status-approved-bg); color: var(--status-approved-fg); }
.badge-rejected { background: var(--status-rejected-bg); color: var(--status-rejected-fg); }
.badge-sold { background: var(--status-sold-bg); color: var(--status-sold-fg); }

/* ---------- Modal (раздел 7 задачи) ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 14, 0.72);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 1000;
  animation: fade-in var(--transition-base);
}

.modal {
  width: 100%;
  max-width: 360px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  padding: var(--space-5);
}

.modal-title {
  font-size: var(--font-size-section-title);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.modal-message {
  color: var(--color-text-secondary);
  font-size: var(--font-size-value);
  margin-bottom: var(--space-5);
}

.modal-actions {
  display: flex;
  gap: var(--space-3);
}

.modal-actions .btn {
  flex: 1 1 0;
}

/* ---------- Icons (раздел 7 задачи — минимальный набор, inline SVG, наследуют currentColor) ---------- */
.icon {
  width: 20px;
  height: 20px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- Loading / Empty / Error states (раздел 19 задачи) ---------- */
.skeleton {
  background: linear-gradient(90deg, var(--color-graphite) 25%, var(--color-surface-elevated) 37%, var(--color-graphite) 63%);
  background-size: 400% 100%;
  border-radius: var(--radius-sm);
  animation: skeleton-shimmer 1.4s ease infinite;
}

.spinner {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  animation: spin 700ms linear infinite;
  margin: 0 auto;
}

.state-block {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  color: var(--color-text-secondary);
}

.state-block .icon {
  width: 32px;
  height: 32px;
  margin: 0 auto var(--space-3);
  color: var(--color-text-muted);
}

.state-title {
  color: var(--color-text-primary);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

@media (prefers-reduced-motion: reduce) {
  .skeleton, .spinner, .btn-loading::after, .modal-overlay {
    animation: none !important;
  }
}

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

@keyframes skeleton-shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: 0 0; }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}