/**
 * HairPin Mẫu Tóc - Pinterest Masonry Grid Engine & Pin Card Styles
 */

/* ==========================================================================
   Masonry Grid Layout (Pure CSS Columns + Responsive Fluidity)
   ========================================================================== */
.masonry-feed-container {
  padding: 24px 0 60px;
}

.masonry-grid {
  column-count: 5;
  column-gap: 16px;
  width: 100%;
}

/* Fluid Responsive Breakpoints */
@media (min-width: 1600px) {
  .masonry-grid {
    column-count: 6;
    column-gap: 18px;
  }
}

@media (max-width: 1400px) {
  .masonry-grid {
    column-count: 4;
    column-gap: 16px;
  }
}

@media (max-width: 1024px) {
  .masonry-grid {
    column-count: 3;
    column-gap: 14px;
  }
}

@media (max-width: 700px) {
  .masonry-grid {
    column-count: 2;
    column-gap: 10px;
  }
}

@media (max-width: 380px) {
  .masonry-grid {
    column-count: 1;
  }
}

/* ==========================================================================
   Pinterest Pin Card
   ========================================================================== */
.pin-card {
  break-inside: avoid;
  page-break-inside: avoid;
  -webkit-column-break-inside: avoid;
  margin-bottom: 16px;
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  background: transparent;
  transition: transform 0.2s ease;
}

@media (max-width: 700px) {
  .pin-card {
    margin-bottom: 10px;
  }
}

/* Pin Media (Image & Actions Container) */
.pin-media {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
}

.pin-link-wrapper {
  display: block;
  width: 100%;
  text-decoration: none;
}

.pin-image {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.35s cubic-bezier(0.2, 0, 0.2, 1), filter 0.3s ease;
}

.pin-card:hover .pin-image {
  transform: scale(1.03);
}

/* Pin Card Overlay (Pinterest Hover Overlay) */
.pin-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.4) 0%,
    rgba(0, 0, 0, 0) 30%,
    rgba(0, 0, 0, 0) 70%,
    rgba(0, 0, 0, 0.5) 100%
  );
  opacity: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 12px;
  transition: opacity 0.22s ease-in-out;
  pointer-events: none;
}

.pin-card:hover .pin-overlay {
  opacity: 1;
}

@media (hover: none) {
  /* On touch devices, keep overlay slightly visible or subtle */
  .pin-overlay {
    opacity: 0;
  }
}

.pin-overlay-top, .pin-overlay-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: auto;
}

.pin-overlay-bottom {
  justify-content: flex-end;
  gap: 8px;
}

/* Badges on Pin */
.pin-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.pin-badge-face {
  background: rgba(17, 17, 17, 0.75);
}

/* Red Save Button (Signature Pinterest Button) */
.pin-btn-save {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 10px rgba(230, 0, 35, 0.4);
}

.pin-btn-save:hover {
  background-color: var(--color-primary-hover);
  transform: scale(1.04);
}

.pin-btn-save.is-saved {
  background-color: var(--color-dark);
  color: #fff;
}

/* Round Action Icons */
.pin-action-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.pin-action-circle:hover {
  background-color: #ffffff;
  transform: scale(1.1);
}

/* ==========================================================================
   Pin Meta Footer (Title, Salon Name, Counter)
   ========================================================================== */
.pin-meta {
  padding: 10px 4px 6px;
}

.pin-title {
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-dark);
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pin-title a:hover {
  text-decoration: underline;
}

.pin-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
}

.pin-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.pin-tag-color {
  color: #c2410c;
}

.pin-author-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.pin-author-info {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}

.pin-author-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pin-author-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 600;
  max-width: 140px;
}

.pin-counter {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  color: var(--color-text-light);
}

.pin-counter.active {
  color: var(--color-primary);
}

/* ==========================================================================
   Load More / Infinite Scroll Section
   ========================================================================== */
.feed-pagination {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 0 20px;
}

.btn-load-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-dark);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.btn-load-more:hover {
  background-color: #2b2b2b;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-load-more.loading {
  pointer-events: none;
  opacity: 0.8;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.btn-load-more.loading .spinner {
  display: inline-block;
}

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

.no-more-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-top: 10px;
  display: none;
}

/* Empty State */
.empty-pins-notice {
  text-align: center;
  padding: 80px 20px;
  column-span: all;
  width: 100%;
}

.empty-icon {
  font-size: 3.5rem;
  margin-bottom: 12px;
}

.empty-pins-notice h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.empty-pins-notice p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}