/* ================================================================
   ZWIPKART DESIGN SYSTEM — COMPONENTS
   Phase 2 component styles: button variants, form validation,
   skeleton loading. Loaded independently from style.min.css
   so new styles don't require minification rebuild.
   ================================================================ */

/* ── Active press feedback (all buttons) ── */
.btn:active:not(:disabled):not(.is-loading) {
  transform: scale(0.97) !important;
  transition-duration: 0.06s;
}

/* ── Disabled state ── */
.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Loading state ── */
.btn.is-loading {
  position: relative;
  pointer-events: none;
  color: transparent !important;
}
.btn.is-loading::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
/* Dark spinner for outline/ghost buttons */
.btn-outline.is-loading::after,
.btn-ghost.is-loading::after,
.btn-text.is-loading::after {
  border-color: rgba(0,0,0,0.15);
  border-top-color: var(--color-text-primary, #000);
}

/* ── Ghost button (transparent, text only, subtle hover) ── */
.btn-ghost {
  background: transparent;
  color: var(--color-text-primary, #000);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--color-bg-subtle, #f5f5f7);
}

/* ── Text button (minimal, underline on hover) ── */
.btn-text {
  background: transparent;
  color: var(--color-accent, #6C3CE1);
  border-color: transparent;
  padding: 8px 12px;
}
.btn-text:hover {
  text-decoration: underline;
}

/* ── Danger button (destructive actions) ── */
.btn-danger {
  background: var(--color-danger, #e63946);
  color: #fff;
  border-color: var(--color-danger, #e63946);
}
.btn-danger:hover {
  background: var(--red-700, #b91c1c);
  border-color: var(--red-700, #b91c1c);
  box-shadow: 0 4px 16px rgba(230,57,70,0.25);
  transform: translateY(-1px);
}

/* ── Ripple effect (tap feedback) ── */
.btn .ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}
.btn-outline .ripple-effect,
.btn-ghost .ripple-effect,
.btn-text .ripple-effect {
  background: rgba(108,60,225,0.12);
}


/* ================================================================
   FORM VALIDATION STATES
   ================================================================ */

/* ── Error state ── */
.form-input.is-error,
.form-select.is-error,
.form-textarea.is-error {
  border-color: var(--color-danger, #e63946);
}
.form-input.is-error:focus,
.form-select.is-error:focus,
.form-textarea.is-error:focus {
  box-shadow: 0 0 0 3px rgba(230,57,70,0.12);
}

/* ── Success state ── */
.form-input.is-success,
.form-select.is-success,
.form-textarea.is-success {
  border-color: var(--color-success, #22c55e);
}
.form-input.is-success:focus,
.form-select.is-success:focus,
.form-textarea.is-success:focus {
  box-shadow: 0 0 0 3px rgba(34,197,94,0.12);
}

/* ── Error message (below field) ── */
.form-error-msg {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-danger, #e63946);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
  animation: fadeInDown 0.2s ease;
}
.form-error-msg::before {
  content: '';
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='12' y1='8' x2='12' y2='12'/%3E%3Cline x1='12' y1='16' x2='12.01' y2='16'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='12' y1='8' x2='12' y2='12'/%3E%3Cline x1='12' y1='16' x2='12.01' y2='16'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ── Helper text (below field) ── */
.form-helper {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted, #6b6b6b);
  margin-top: 4px;
}

/* ── Required indicator ── */
.form-label.required::after {
  content: ' *';
  color: var(--color-danger, #e63946);
  font-weight: 400;
}

/* ── Disabled form fields ── */
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--color-bg-subtle, #f5f5f7);
}

/* ── Password toggle container ── */
.form-password-wrap {
  position: relative;
}
.form-password-wrap .form-input {
  padding-right: 48px;
}
.form-password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted, #6b6b6b);
  padding: 4px;
  font-size: var(--text-sm, 0.8125rem);
}
.form-password-toggle:hover {
  color: var(--color-text-primary, #000);
}

/* ── Mobile form UX — prevent iOS zoom ── */
@media (max-width: 768px) {
  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px;
  }
}


/* ================================================================
   UNIFIED SKELETON LOADING SYSTEM
   ================================================================ */

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

.skel {
  background: linear-gradient(90deg, var(--gray-100, #f5f5f7) 25%, var(--gray-200, #e5e5e5) 50%, var(--gray-100, #f5f5f7) 75%);
  background-size: 200% 100%;
  animation: skel-shimmer 1.6s ease-in-out infinite;
  border-radius: var(--r-sm, 6px);
  display: block;
}
.skel-text {
  height: 14px;
  margin-bottom: 8px;
  border-radius: 4px;
}
.skel-text--sm { height: 10px; }
.skel-text--lg { height: 20px; }
.skel-heading {
  height: 24px;
  width: 60%;
  margin-bottom: 12px;
  border-radius: 4px;
}
.skel-image {
  width: 100%;
  aspect-ratio: 1/1;
  border-radius: var(--r-lg, 12px);
}
.skel-button {
  height: 44px;
  width: 120px;
  border-radius: var(--r-full, 999px);
}
.skel-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}
.skel-card {
  transition: opacity 0.2s ease;
}
.skel-loading {
  min-height: 200px;
}


/* ================================================================
   MODAL / DRAWER STANDARDIZATION
   Consistent overlay, enter/exit animations, scroll lock.
   ================================================================ */

/* ── Shared overlay base ── */
.overlay-base,
.cart-overlay,
.filter-sheet-overlay,
.auth-modal-overlay,
#wishlist-drawer-overlay {
  transition: opacity var(--duration-normal, 0.25s) ease;
}

/* ── Drawer slide animation (right side) ── */
.cart-drawer,
#wishlist-drawer {
  transition: transform var(--duration-slow, 0.35s) var(--ease-spring, cubic-bezier(0.16, 1, 0.3, 1));
}

/* ── Modal scale-in animation ── */
.auth-modal,
.search-modal-inner {
  transition: opacity var(--duration-normal, 0.25s) ease,
              transform var(--duration-normal, 0.25s) var(--ease-spring, cubic-bezier(0.16, 1, 0.3, 1));
}

/* ── Filter bottom sheet (mobile) ── */
@media (max-width: 1024px) {
  .filter-sidebar {
    transition: transform var(--duration-slow, 0.35s) var(--ease-spring, cubic-bezier(0.16, 1, 0.3, 1));
  }
}

/* ── Body scroll lock (applied via JS) ── */
body.scroll-locked {
  overflow: hidden;
  position: fixed;
  width: 100%;
  top: var(--scroll-top, 0);
}

/* ── Reduced motion: disable all modal/drawer transitions ── */
@media (prefers-reduced-motion: reduce) {
  .cart-drawer,
  #wishlist-drawer,
  .auth-modal,
  .search-modal-inner,
  .filter-sidebar,
  .cart-overlay,
  .filter-sheet-overlay,
  .auth-modal-overlay,
  #wishlist-drawer-overlay {
    transition-duration: 0.01ms !important;
  }
}


/* ================================================================
   SCROLL REVEAL ENHANCEMENTS
   Extended variants: fade-up (default), fade-down, fade-left,
   fade-right, scale, blur. Stagger children with .reveal-stagger.
   ================================================================ */

/* ── Variants use !important to override base [data-reveal] in style.css ── */
[data-reveal="fade-down"] {
  transform: translateY(-24px) !important;
}

[data-reveal="fade-left"] {
  transform: translateX(-32px) !important;
}

[data-reveal="fade-right"] {
  transform: translateX(32px) !important;
}

[data-reveal="scale"] {
  transform: scale(0.92) !important;
}

[data-reveal="blur"] {
  transform: translateY(12px) !important;
  filter: blur(6px);
}

/* ── All variants resolve to identity on reveal ── */
[data-reveal].revealed {
  opacity: 1 !important;
  transform: none !important;
  filter: none !important;
}

/* ── Stagger children: auto-delay each child ── */
.reveal-stagger > [data-reveal]:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > [data-reveal]:nth-child(2) { transition-delay: 0.08s; }
.reveal-stagger > [data-reveal]:nth-child(3) { transition-delay: 0.16s; }
.reveal-stagger > [data-reveal]:nth-child(4) { transition-delay: 0.24s; }
.reveal-stagger > [data-reveal]:nth-child(5) { transition-delay: 0.32s; }
.reveal-stagger > [data-reveal]:nth-child(6) { transition-delay: 0.4s; }
.reveal-stagger > [data-reveal]:nth-child(7) { transition-delay: 0.48s; }
.reveal-stagger > [data-reveal]:nth-child(8) { transition-delay: 0.56s; }

/* ── Extended delay attributes ── */
[data-reveal-delay="500"] { transition-delay: 0.5s; }
[data-reveal-delay="600"] { transition-delay: 0.6s; }

/* ── Reduced motion: reveal instantly ── */
@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }
}


/* ================================================================
   TOAST PROGRESS BAR
   Auto-dismiss visual indicator.
   ================================================================ */

.toast {
  position: relative;
  overflow: hidden;
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: currentColor;
  opacity: 0.3;
  border-radius: 0 0 var(--r-sm, 6px) var(--r-sm, 6px);
  animation: toastProgress var(--toast-duration, 4s) linear forwards;
}

@keyframes toastProgress {
  from { width: 100%; }
  to   { width: 0%; }
}


/* ================================================================
   EMPTY STATE SYSTEM
   Branded, actionable empty states with SVG illustrations.
   ================================================================ */

.empty-state-v2 {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--sp-16, 64px) var(--sp-6, 24px);
  animation: fadeIn 0.4s ease;
}

.empty-state-v2-illustration {
  width: 120px;
  height: 120px;
  margin-bottom: var(--sp-6, 24px);
  color: var(--color-accent, #6C3CE1);
  opacity: 0.85;
}

.empty-state-v2-illustration svg {
  width: 100%;
  height: 100%;
}

.empty-state-v2-title {
  font-size: var(--text-xl, 1.25rem);
  font-weight: 700;
  color: var(--color-text-primary, #111);
  margin-bottom: var(--sp-2, 8px);
  line-height: var(--leading-tight, 1.1);
}

.empty-state-v2-description {
  font-size: var(--text-base, 0.875rem);
  color: var(--color-text-muted, #6b6b6b);
  max-width: 320px;
  margin: 0 auto;
  line-height: var(--leading-normal, 1.5);
}

.empty-state-v2-action {
  margin-top: var(--sp-6, 24px);
}

/* Compact variant for drawers/sidebars */
.empty-state-v2.compact {
  padding: var(--sp-10, 40px) var(--sp-4, 16px);
}

.empty-state-v2.compact .empty-state-v2-illustration {
  width: 88px;
  height: 88px;
  margin-bottom: var(--sp-4, 16px);
}

.empty-state-v2.compact .empty-state-v2-title {
  font-size: var(--text-lg, 1.125rem);
}

.empty-state-v2.compact .empty-state-v2-description {
  font-size: var(--text-sm, 0.8125rem);
}


/* ================================================================
   TRUST STRIP COMPONENT
   Reusable trust signal bar for product/checkout pages.
   ================================================================ */

.trust-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4, 16px);
  padding: var(--sp-3, 12px) var(--sp-4, 16px);
  border: 1px solid var(--color-border-default, #e5e5e7);
  border-radius: var(--r-lg, 12px);
  background: var(--color-bg-card, #fff);
  flex-wrap: wrap;
}

.trust-strip-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2, 8px);
  font-size: var(--text-sm, 0.8125rem);
  color: var(--color-text-secondary, #424245);
  white-space: nowrap;
}

.trust-strip-icon {
  width: 20px;
  height: 20px;
  color: var(--color-success, #22c55e);
  flex-shrink: 0;
}

.trust-strip-icon svg {
  width: 100%;
  height: 100%;
}

.trust-strip-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border-default, #e5e5e7);
}

/* Compact variant — less padding, smaller text */
.trust-strip.compact {
  gap: var(--sp-3, 12px);
  padding: var(--sp-2, 8px) var(--sp-3, 12px);
}

.trust-strip.compact .trust-strip-item {
  font-size: var(--text-xs, 0.75rem);
}

.trust-strip.compact .trust-strip-icon {
  width: 16px;
  height: 16px;
}

/* Urgency signals */
.urgency-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--r-full, 999px);
  font-size: var(--text-2xs, 0.625rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider, 0.04em);
  animation: pulse 2s ease-in-out infinite;
}

.urgency-badge.low-stock {
  background: rgba(245, 158, 11, 0.1);
  color: var(--amber-700, #b45309);
}

.urgency-badge.selling-fast {
  background: rgba(230, 57, 70, 0.1);
  color: var(--color-danger, #e63946);
}

.stock-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm, 0.8125rem);
}

.stock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.stock-dot.in-stock { background: var(--color-success, #22c55e); }
.stock-dot.low-stock { background: var(--amber-500, #f59e0b); }
.stock-dot.out-of-stock { background: var(--color-danger, #e63946); }

@media (max-width: 640px) {
  .trust-strip {
    gap: var(--sp-3, 12px);
    padding: var(--sp-3, 12px);
  }
  .trust-strip-divider { display: none; }
  .trust-strip-item { font-size: var(--text-xs, 0.75rem); }
}


/* ================================================================
   BOTTOM SHEET COMPONENT
   Reusable mobile bottom sheet with drag handle, snap points,
   and touch-to-dismiss.
   ================================================================ */

.bottom-sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: var(--z-overlay, 900);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal, 0.25s) ease;
}

.bottom-sheet-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-modal, 1000);
  background: var(--color-bg-card, #fff);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -4px 24px rgba(0,0,0,0.12);
  transform: translateY(100%);
  transition: transform var(--duration-slow, 0.35s) var(--ease-spring, cubic-bezier(0.16, 1, 0.3, 1));
  max-height: 85vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding-bottom: max(var(--sp-4, 16px), env(safe-area-inset-bottom));
}

.bottom-sheet.open {
  transform: translateY(0);
}

.bottom-sheet-handle {
  display: flex;
  justify-content: center;
  padding: 12px 0 8px;
  cursor: grab;
}

.bottom-sheet-handle::before {
  content: '';
  width: 36px;
  height: 4px;
  border-radius: 2px;
  background: var(--gray-300, #d1d1d6);
}

.bottom-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4, 16px) var(--sp-3, 12px);
  border-bottom: 1px solid var(--color-border-default, #e5e5e7);
}

.bottom-sheet-title {
  font-size: var(--text-lg, 1.125rem);
  font-weight: 700;
}

.bottom-sheet-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-bg-subtle, #f5f5f7);
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--color-text-muted, #6b6b6b);
}

.bottom-sheet-body {
  padding: var(--sp-4, 16px);
}

/* Dragging state — disable transition for smooth touch tracking */
.bottom-sheet.dragging {
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  .bottom-sheet,
  .bottom-sheet-overlay {
    transition-duration: 0.01ms !important;
  }
}


/* ================================================================
   MOBILE TAB BAR ENHANCEMENTS
   Tactile press feedback, badge count animation.
   ================================================================ */

/* ── Tactile press effect ── */
.mobile-tab-bar a:active {
  transform: scale(0.88);
  transition: transform 0.08s ease;
}

.mobile-tab-bar a {
  transition: color 0.15s, transform 0.15s var(--ease-spring, cubic-bezier(0.16, 1, 0.3, 1));
}

/* ── Badge count pop animation on update ── */
@keyframes badgePop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.35); }
  100% { transform: scale(1); }
}

.mobile-tab-bar .tab-cart-badge.pop {
  animation: badgePop 0.3s var(--ease-spring, cubic-bezier(0.16, 1, 0.3, 1));
}

/* ── Scroll snap hints for horizontal scrollable areas ── */
.scroll-snap-x {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.scroll-snap-x::-webkit-scrollbar { display: none; }

.scroll-snap-x > * {
  scroll-snap-align: start;
  flex-shrink: 0;
}

/* Fade hint on right edge — indicates more content */
.scroll-snap-hint {
  position: relative;
}

.scroll-snap-hint::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 100%;
  background: linear-gradient(to right, transparent, var(--color-bg-page, #fff));
  pointer-events: none;
  z-index: 1;
}


/* ================================================================
   DATA ERROR STATE
   Standardized error display for failed Firestore fetches.
   Usage: ZK.dataError(container, { message, retryFn })
   ================================================================ */

.data-error {
  text-align: center;
  padding: var(--sp-12, 48px) var(--sp-6, 24px);
  color: var(--color-text-muted, #6b7280);
}

.data-error-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--sp-4, 16px);
  color: var(--color-text-muted, #9ca3af);
  opacity: 0.6;
}

.data-error-title {
  font-size: var(--text-lg, 1.125rem);
  font-weight: 600;
  color: var(--color-text-primary, #111);
  margin-bottom: var(--sp-2, 8px);
}

.data-error-message {
  font-size: var(--text-sm, 0.8125rem);
  color: var(--color-text-muted, #6b7280);
  max-width: 360px;
  margin: 0 auto var(--sp-5, 20px);
  line-height: var(--leading-relaxed, 1.65);
}

.data-error-retry {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--r-full, 999px);
  border: 1.5px solid var(--color-accent, #6C3CE1);
  background: transparent;
  color: var(--color-accent, #6C3CE1);
  font-size: var(--text-sm, 0.8125rem);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.data-error-retry:hover {
  background: var(--color-accent, #6C3CE1);
  color: #fff;
}

.data-error-retry svg {
  width: 16px;
  height: 16px;
}


/* ================================================================
   DATA LOADED FADE-IN
   Smooth appearance when Firestore data arrives.
   Add .data-loaded to container after rendering data.
   ================================================================ */

.data-await {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--duration-normal, 0.25s) var(--ease-out, cubic-bezier(0, 0, 0.2, 1)),
              transform var(--duration-normal, 0.25s) var(--ease-out, cubic-bezier(0, 0, 0.2, 1));
}

.data-await.data-loaded {
  opacity: 1;
  transform: translateY(0);
}


/* ================================================================
   IMAGE FALLBACK (branded placeholder)
   ================================================================ */

.img-error {
  opacity: 0.5;
}

.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--color-bg-subtle, #f5f5f7);
  border-radius: var(--r-md, 8px);
  color: var(--color-text-muted, #9ca3af);
}

.img-placeholder svg {
  width: 32px;
  height: 32px;
  opacity: 0.4;
}


/* ================================================================
   KEYFRAMES (used by components above)
   ================================================================ */

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}
@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}