/* ============================================
   Map of Us 我们的地图 v2.0 — Timeline Page Styles
   Apple Memories Style — 大照片 + 粉色发光线
   ============================================ */

/* === Page Container === */
.timeline-page {
  max-width: 860px;
  padding: var(--space-xl);
  margin: 0;
}

.timeline-page__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.timeline-page__titles {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.timeline-page__title {
  font-size: var(--font-display-xl);
  font-weight: var(--weight-bold);
  color: var(--color-ink);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.timeline-page__subtitle {
  font-size: var(--font-body-sm);
  color: var(--color-muted);
  font-weight: var(--weight-normal);
  margin: 0;
}

/* === Toggle: Timeline / Grid View Switcher === */
.timeline-toggle {
  display: inline-flex;
  background: var(--color-surface-soft);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.timeline-toggle__btn {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: var(--font-body-sm);
  font-weight: var(--weight-medium);
  color: var(--color-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-family);
  line-height: 1.25;
}
.timeline-toggle__btn:hover {
  color: var(--color-ink);
}

.timeline-toggle__btn--active {
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   Timeline View — Apple Memories Style
   ============================================ */

.timeline {
  position: relative;
  padding-left: 44px;
}

/* Vertical glowing line — pink gradient */
.timeline::before {
  content: '';
  position: absolute;
  left: 17px;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 1px;
  background: linear-gradient(
    180deg,
    rgba(255, 111, 174, 0.08) 0%,
    rgba(255, 111, 174, 0.6) 15%,
    #FF6FAE 50%,
    rgba(255, 199, 220, 0.6) 85%,
    rgba(255, 199, 220, 0.08) 100%
  );
  box-shadow:
    0 0 6px rgba(255, 111, 174, 0.25),
    0 0 14px rgba(255, 111, 174, 0.10);
}

/* === Month Header === */
.timeline-month {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  background: var(--color-bg);
  padding: var(--space-base) 0 var(--space-sm);
  margin-bottom: var(--space-lg);
  margin-left: -44px;
  padding-left: 48px;
}

.timeline-month__label {
  font-size: var(--font-display-sm);
  font-weight: var(--weight-bold);
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.timeline-month__count {
  font-size: var(--font-caption-sm);
  font-weight: var(--weight-normal);
  color: var(--color-muted-soft);
}

/* === Timeline Item === */
.timeline-item {
  position: relative;
  margin-bottom: var(--space-xl);
}

/* Glowing dot on the timeline line */
.timeline-item::before {
  content: '';
  position: absolute;
  left: -31px;          /* 17px(line center) - 4px(half dot) - 44px(padding) ...  */
  top: 32px;            /* align with top of card */
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #FF6FAE;
  box-shadow:
    0 0 6px rgba(255, 111, 174, 0.7),
    0 0 16px rgba(255, 111, 174, 0.35),
    0 0 28px rgba(255, 111, 174, 0.15);
  z-index: 2;
}

/* Main card — flex row: photo | info */
.timeline-item__card {
  display: flex;
  gap: var(--space-lg);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  transition:
    transform 0.35s cubic-bezier(0.25, 0.1, 0.25, 1),
    box-shadow 0.35s cubic-bezier(0.25, 0.1, 0.25, 1),
    border-color 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
  box-shadow: var(--shadow-sm);
}

.timeline-item__card:hover {
  transform: scale(1.02);
  border-color: rgba(255, 111, 174, 0.5);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 0 0 1px rgba(255, 111, 174, 0.12),
    0 0 24px rgba(255, 111, 174, 0.12);
}

/* === Photo Area — 16:10 large === */
.timeline-item__photo {
  width: 280px;
  min-width: 280px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-surface-soft);
  flex-shrink: 0;
}

.timeline-item__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.timeline-item__card:hover .timeline-item__photo img {
  transform: scale(1.05);
}

/* Photo placeholder (no image) */
.timeline-item__photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--color-muted-soft);
  background: var(--color-primary-light);
}

/* === Info Area (right side) === */
.timeline-item__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: var(--space-base) var(--space-lg) var(--space-base) 0;
}

.timeline-item__city {
  font-size: var(--font-title-lg);
  font-weight: var(--weight-bold);
  color: var(--color-ink);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.timeline-item__date {
  font-size: var(--font-body-sm);
  color: var(--color-muted);
}

.timeline-item__counts {
  display: flex;
  gap: var(--space-base);
  font-size: var(--font-caption-sm);
  color: var(--color-muted-soft);
  margin-top: 2px;
}

.timeline-item__counts span {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.timeline-item__counts .count-icon {
  font-size: 14px;
  opacity: 0.7;
}

/* Province tag */
.timeline-item__province {
  display: inline-block;
  font-size: var(--font-badge);
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  width: fit-content;
  margin-top: 2px;
}

/* Arrow indicator */
.timeline-item__arrow {
  display: flex;
  align-items: center;
  align-self: center;
  color: var(--color-muted-soft);
  transition: color var(--transition-fast),
              transform var(--transition-fast);
  flex-shrink: 0;
  padding-right: var(--space-base);
  font-size: 18px;
}
.timeline-item__card:hover .timeline-item__arrow {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ============================================
   Grid View — Pinterest Masonry
   ============================================ */

.timeline-grid {
  columns: 3;
  column-gap: var(--space-base);
}

.timeline-grid__item {
  break-inside: avoid;
  margin-bottom: var(--space-base);
}

/* Grid card */
.timeline-grid__card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  transition:
    transform 0.35s cubic-bezier(0.25, 0.1, 0.25, 1),
    box-shadow 0.35s cubic-bezier(0.25, 0.1, 0.25, 1),
    border-color 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
  box-shadow: var(--shadow-sm);
}

.timeline-grid__card:hover {
  transform: scale(1.02);
  border-color: rgba(255, 111, 174, 0.5);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 0 0 1px rgba(255, 111, 174, 0.12),
    0 0 24px rgba(255, 111, 174, 0.12);
}

/* Grid photo */
.timeline-grid__photo {
  width: 100%;
  overflow: hidden;
  background: var(--color-surface-soft);
}

.timeline-grid__photo img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.timeline-grid__card:hover .timeline-grid__photo img {
  transform: scale(1.05);
}

.timeline-grid__photo-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--color-muted-soft);
  background: var(--color-primary-light);
}

/* Grid meta */
.timeline-grid__meta {
  padding: var(--space-md) var(--space-base);
}

.timeline-grid__city {
  font-size: var(--font-title-md);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
  margin-bottom: 2px;
  line-height: 1.25;
}

.timeline-grid__date {
  font-size: var(--font-caption-sm);
  color: var(--color-muted);
  margin-bottom: 4px;
}

.timeline-grid__counts {
  display: flex;
  gap: var(--space-md);
  font-size: var(--font-caption-sm);
  color: var(--color-muted-soft);
}

.timeline-grid__counts span {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.timeline-grid__province {
  display: inline-block;
  font-size: var(--font-badge);
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 1px 8px;
  border-radius: var(--radius-full);
  margin-top: 6px;
}

/* ============================================
   Empty State (kept from original)
   ============================================ */

.timeline-page .empty-state {
  text-align: center;
  padding: 80px var(--space-xl) 0;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 744px) {
  .timeline-page {
    padding: var(--space-base);
  }

  .timeline {
    padding-left: 36px;
  }

  .timeline::before {
    left: 13px;
  }

  .timeline-item::before {
    left: -27px;
    top: 20px;
    width: 6px;
    height: 6px;
  }

  .timeline-month {
    margin-left: -36px;
    padding-left: 40px;
  }

  /* Stack photo on top, info below */
  .timeline-item__card {
    flex-direction: column;
  }

  .timeline-item__photo {
    width: 100%;
    min-width: 100%;
    aspect-ratio: 16 / 9;
  }

  .timeline-item__info {
    padding: 0 var(--space-base) var(--space-base);
  }

  .timeline-item__arrow {
    display: none;
  }

  /* Grid: 2 columns */
  .timeline-grid {
    columns: 2;
  }
}

@media (max-width: 480px) {
  .timeline-page__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .timeline-page__title {
    font-size: var(--font-display-lg);
  }

  .timeline-item__photo {
    aspect-ratio: 16 / 9;
  }

  /* Grid: 1 column */
  .timeline-grid {
    columns: 1;
  }
}