/**
 * ZevX Store — Shared Component Design System (design-system.css)
 *
 * Reusable, accessible UI primitives:
 * - Buttons (44px touch friendly, high contrast WCAG AAA primary)
 * - Form Controls (16px mobile-safe font, >= 3:1 control borders, clear focus & error states)
 * - Badges & Status Chips
 * - Skeletons, Empty/Error State Cards, Alerts, Modals & Toasts
 */

/* ==========================================================================
   1. BUTTONS & INTERACTIVE ACTIONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-sm);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  user-select: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn:focus-visible {
  outline: 2.5px solid var(--color-border-focus);
  outline-offset: 2px;
  box-shadow: var(--shadow-focus);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.52;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none !important;
  transform: none !important;
}

.btn-xs {
  min-height: 34px;
  padding: 6px 12px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

.btn-sm {
  min-height: 38px;
  padding: 8px 14px;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-md {
  min-height: 44px;
  padding: 10px 20px;
}

.btn-lg {
  min-height: 48px;
  padding: 12px 26px;
  font-size: var(--font-size-base);
  border-radius: var(--radius-md);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Primary Action: Royal ZevX Violet (#7c3aed with #ffffff -> 5.7:1 AAA) */
.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
  transform: translateY(-1.5px);
}

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-active);
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 2px 6px rgba(124, 58, 237, 0.3);
}

/* Secondary Action: Tactical Obsidian Ink */
.btn-secondary {
  background-color: #141e33;
  border-color: rgba(56, 189, 248, 0.25);
  color: #f8fafc;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #1c2a47;
  border-color: rgba(56, 189, 248, 0.45);
  color: #ffffff;
  transform: translateY(-1.5px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4), 0 0 12px rgba(56, 189, 248, 0.15);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

/* Outline Action */
.btn-outline {
  background-color: var(--color-surface);
  border-color: var(--color-border-control);
  color: var(--color-text);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-surface-raised);
  color: var(--color-text);
}

/* Destructive Action */
.btn-danger {
  background-color: var(--color-danger);
  border-color: var(--color-danger);
  color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
  background-color: #991b1b;
  border-color: #991b1b;
  color: #ffffff;
}

.btn-danger-outline {
  background-color: var(--color-surface);
  border-color: #ef4444;
  color: var(--color-danger);
}

.btn-danger-outline:hover:not(:disabled) {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger);
}

/* Loading Spinner State on Buttons */
.btn-loading,
.btn.is-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn-loading::after,
.btn.is-loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  top: calc(50% - 9px);
  left: calc(50% - 9px);
  border: 2.5px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: zevxSpin 0.75s linear infinite;
}

.btn-outline.btn-loading::after,
.btn-outline.is-loading::after {
  border-color: rgba(109, 40, 217, 0.25);
  border-top-color: var(--color-primary);
}

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

/* ==========================================================================
   2. ACCESSIBLE FORM CONTROLS
   ========================================================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

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

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
}

.required-star,
.form-label-required::after {
  color: var(--color-danger);
  font-weight: 800;
}

.form-label-required::after {
  content: " *";
}

.form-control,
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: 1.45;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-border-control);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-textarea,
textarea.form-control {
  min-height: 96px;
  resize: vertical;
}

.form-control::placeholder,
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted, #94a3b8);
}

.form-control:hover:not(:disabled):not([readonly]),
.form-input:hover:not(:disabled):not([readonly]),
.form-select:hover:not(:disabled),
.form-textarea:hover:not(:disabled) {
  border-color: var(--color-border-strong, #3b4d70);
}

.form-control:focus,
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus, #38bdf8);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.35);
}

.form-control:disabled,
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled,
.form-control-readonly {
  background-color: var(--color-surface-raised) !important;
  border-color: var(--color-border) !important;
  color: var(--color-muted) !important;
  cursor: not-allowed;
}

.form-control[aria-invalid="true"],
.form-input[aria-invalid="true"] {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.25);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  line-height: 1.45;
}

.form-error,
.form-error-msg {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-danger-light, #f87171);
  min-height: 16px;
  line-height: 1.4;
}

.form-error-msg:empty {
  display: none;
}

/* ==========================================================================
   3. SEMANTIC BADGES & STATUS PILLS
   ========================================================================== */

.badge,
.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: var(--font-size-xs);
  font-weight: 700;
  line-height: 1.2;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  white-space: nowrap;
}

.badge-primary {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary-border);
  color: var(--color-primary-hover, #9061f9);
}

.badge-info,
.badge-tag-instant {
  background-color: var(--color-info-bg);
  border-color: var(--color-info-border);
  color: var(--color-info-light, #7dd3fc);
}

.badge-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: var(--color-success-light, #34d399);
}

.badge-warning,
.badge-tag-sale {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: var(--color-warning-light, #fbbf24);
}

.badge-danger,
.badge-tag-hot {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger-light, #f87171);
}

.badge-secondary,
.badge-neutral {
  background-color: var(--color-surface-raised);
  border-color: var(--color-border);
  color: var(--color-text-secondary, #cbd5e1);
}

/* Solid High-Contrast Overlay Badges on Dark Product Artwork */
.product-badges .badge-tag {
  border-radius: var(--radius-xs);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.product-badges .badge-tag-sale {
  background-color: #fde047;
  border-color: #facc15;
  color: #0f172a;
  font-weight: 800;
}

.product-badges .badge-tag-hot {
  background-color: #7c3aed;
  border-color: #9061f9;
  color: #ffffff;
  font-weight: 800;
  box-shadow: 0 2px 10px rgba(124, 58, 237, 0.4);
}

/* ==========================================================================
   4. SKELETON LOADERS & STATE BOXES (LOADING / EMPTY / ERROR)
   ========================================================================== */

.skeleton {
  background: linear-gradient(90deg, #162035 25%, #243556 50%, #162035 75%);
  background-size: 200% 100%;
  animation: zevxShimmer 1.5s var(--ease-enter, ease-in-out) infinite;
  border-radius: var(--radius-md);
}

.skeleton-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding-bottom: 16px;
}

.skeleton-media {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 0;
}

.skeleton-line {
  height: 14px;
  margin: 12px 16px 0;
}

.skeleton-line.w-60 { width: 60%; }
.skeleton-line.w-40 { width: 40%; }
.skeleton-line.h-lg { height: 22px; }

@keyframes zevxShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.store-state-box,
.empty-state-box,
.loading-state-box,
.error-state-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  margin: 16px 0;
}

.error-state-box {
  border-color: var(--color-danger-border);
  background-color: var(--color-danger-bg);
}

.state-mascot-img,
.empty-state-img {
  width: 108px;
  height: 108px;
  object-fit: contain;
  margin-bottom: 14px;
}

.state-spinner-img {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
}

.state-title,
.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 8px;
}

.state-desc,
.empty-state-desc {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  max-width: 460px;
  line-height: 1.6;
  margin: 0 0 20px;
}

/* ==========================================================================
   5. ALERTS, MODALS & TOAST NOTIFICATIONS
   ========================================================================== */

.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: 1.55;
  margin-bottom: 16px;
  border: 1px solid transparent;
}

.alert-info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info-border);
  color: #0c4a6e;
}

.alert-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: #064e3b;
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: #78350f;
}

.alert-danger {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: #7f1d1d;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-backdrop.open,
.modal-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 800;
  margin: 0;
}

.modal-close-btn {
  min-width: 36px;
  min-height: 36px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-close-btn:hover {
  background-color: var(--color-surface-raised);
  color: var(--color-text);
}

.modal-body {
  padding: 20px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-raised);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 400px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background-color: #111827;
  color: #f8fafc;
  border: 1px solid #334155;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  transform: translateY(14px);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.toast.is-hiding {
  transform: translateY(8px);
  opacity: 0;
}

.toast-indicator {
  width: 4px;
  height: 24px;
  border-radius: 2px;
  flex-shrink: 0;
}

.toast-info .toast-indicator { background-color: #38bdf8; }
.toast-success .toast-indicator { background-color: #10b981; }
.toast-warning .toast-indicator { background-color: #f59e0b; }
.toast-error .toast-indicator { background-color: #ef4444; }

.toast-message {
  flex: 1;
  line-height: 1.45;
}

.toast-close {
  min-width: 32px;
  min-height: 32px;
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 18px;
  cursor: pointer;
}

.toast-close:hover {
  color: #ffffff;
}