/*
  NSS TSEC Mumbai — Events Timeline Stylesheet
  Horizontal Calendar Strip Design
  8px Grid System · CSS Variables · Reduced-Motion Safe
*/

/* ═══════════════════════════════
   TIMELINE HERO
   ═══════════════════════════════ */
.timeline-hero {
  text-align: center;
  padding: 48px 0 32px;
  background: linear-gradient(135deg, #fafafa 0%, #f0f0f0 100%);
}

.timeline-hero-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: #1a1a1a;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(30px);
}

.timeline-hero-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: #555;
  font-weight: 400;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(20px);
}

/* ═══════════════════════════════
   ACADEMIC YEAR SELECTOR
   ═══════════════════════════════ */
.academic-year-selector {
  background: #f5f5f5;
}

.year-tabs-container {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.year-tab {
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #555;
  background: #fff;
  border: 2px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  padding: 16px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.year-tab:hover {
  transform: translateY(-2px);
  border-color: rgba(211, 47, 47, 0.3);
  box-shadow: 0 6px 12px -2px rgba(211, 47, 47, 0.1);
}

.year-tab.is-active {
  background: var(--primary-color, #d32f2f);
  color: #fff;
  border-color: var(--primary-color, #d32f2f);
  box-shadow: 0 8px 16px -4px rgba(211, 47, 47, 0.3);
}

.year-tab .year-icon {
  font-size: 1.4rem;
}

.year-content {
  display: none;
}

.year-content.is-active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════
   TIMELINE SECTION WRAPPER
   ═══════════════════════════════ */
.timeline-section {
  background: #f5f5f5;
  padding-bottom: 64px;
}

/* ═══════════════════════════════
   FILTER BAR
   ═══════════════════════════════ */
.filter-bar-section {
  background: #f5f5f5;
  padding: 24px 0 8px;
  position: sticky;
  top: 72px;
  z-index: 100;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

/* Search input wrapper */
.filter-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 220px;
  max-width: 360px;
}

.filter-search-icon {
  position: absolute;
  left: 14px;
  font-size: 1rem;
  pointer-events: none;
  line-height: 1;
}

.filter-search-input {
  width: 100%;
  padding: 10px 40px 10px 40px;
  border: 2px solid #e0e0e0;
  border-radius: 32px;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: #1a1a1a;
  background: #fff;
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  -webkit-appearance: none;
  appearance: none;
}

.filter-search-input:focus {
  border-color: var(--primary-color, #d32f2f);
  box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
}

.filter-search-input::placeholder {
  color: #aaa;
}

/* Clear (✕) button inside search */
.filter-clear-btn {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  cursor: pointer;
  color: #aaa;
  font-size: 0.85rem;
  line-height: 1;
  padding: 4px;
  border-radius: 50%;
  transition: color 0.2s ease, background 0.2s ease;
}

.filter-clear-btn:hover {
  color: var(--primary-color, #d32f2f);
  background: rgba(211, 47, 47, 0.08);
}

/* Category chips */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  border: 2px solid #ddd;
  background: #fff;
  color: #555;
  cursor: pointer;
  letter-spacing: 0.3px;
  transition: border-color 0.2s ease, background 0.2s ease,
              color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.filter-chip:hover {
  border-color: var(--primary-color, #d32f2f);
  color: var(--primary-color, #d32f2f);
  transform: translateY(-1px);
}

.filter-chip.is-active {
  background: var(--primary-color, #d32f2f);
  border-color: var(--primary-color, #d32f2f);
  color: #fff;
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.3);
}

/* No results */
.filter-no-results {
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: #888;
  text-align: center;
  padding: 32px 0 8px;
  letter-spacing: 0.3px;
}

@media (max-width: 600px) {
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-search-wrap {
    max-width: 100%;
  }
}



/* ═══════════════════════════════
   MONTH BLOCK
   ═══════════════════════════════ */
.month-block {
  margin-bottom: 64px;
}

.month-heading {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 800;
  color: #1a1a1a;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--primary-color, #d32f2f);
  display: inline-block;
}

.month-heading span {
  color: var(--primary-color, #d32f2f);
}

/* ═══════════════════════════════
   HORIZONTAL STRIP TRACK
   ═══════════════════════════════ */
.strip-scroll-wrapper {
  overflow-x: auto;
  overflow-y: visible;
  padding-bottom: 8px;
  /* Hide scrollbar but keep functionality */
  scrollbar-width: thin;
  scrollbar-color: rgba(211, 47, 47, 0.3) transparent;
  -webkit-overflow-scrolling: touch;
}

.strip-scroll-wrapper::-webkit-scrollbar {
  height: 4px;
}

.strip-scroll-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.strip-scroll-wrapper::-webkit-scrollbar-thumb {
  background: rgba(211, 47, 47, 0.35);
  border-radius: 4px;
}

.strip-track {
  display: flex;
  align-items: flex-start;
  position: relative;
  padding: 40px 32px 24px;
  min-width: max-content;
}

/* The thin horizontal line */
.strip-track::before {
  content: '';
  position: absolute;
  top: 56px; /* vertically centered on dots */
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, #ddd 8%, #ddd 92%, transparent 100%);
  pointer-events: none;
}

/* ═══════════════════════════════
   TIMELINE NODE
   ═══════════════════════════════ */
.strip-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 120px;
  cursor: pointer;
  position: relative;
  /* scroll-snap-align: start; */
  padding: 0 8px;
  transition: transform 0.2s ease;
}

.strip-node:hover {
  transform: translateY(-2px);
}

.node-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid #ccc;
  transition: border-color 0.3s ease,
              background 0.3s ease,
              box-shadow 0.3s ease,
              transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

/* Tick mark below the line */
.node-tick {
  width: 2px;
  height: 10px;
  background: #ccc;
  transition: background 0.3s ease;
  margin-top: 0;
}

.node-date {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  text-align: center;
  margin-top: 6px;
  line-height: 1.3;
  white-space: nowrap;
  transition: color 0.3s ease;
}

.node-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 500;
  color: #aaa;
  text-align: center;
  margin-top: 4px;
  line-height: 1.3;
  max-width: 104px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.3s ease;
}

/* Active / selected node */
.strip-node.is-active .node-dot {
  background: var(--primary-color, #d32f2f);
  border-color: var(--primary-color, #d32f2f);
  box-shadow: 0 0 0 5px rgba(211, 47, 47, 0.18),
              0 0 0 10px rgba(211, 47, 47, 0.07);
  transform: scale(1.25);
}

.strip-node.is-active .node-tick {
  background: var(--primary-color, #d32f2f);
}

.strip-node.is-active .node-date {
  color: var(--primary-color, #d32f2f);
  font-weight: 800;
}

.strip-node.is-active .node-title {
  color: #444;
}

/* Hover state for inactive nodes */
.strip-node:not(.is-active):hover .node-dot {
  border-color: var(--primary-color, #d32f2f);
  background: rgba(211, 47, 47, 0.08);
}

.strip-node:not(.is-active):hover .node-date {
  color: #555;
}

/* ═══════════════════════════════
   EVENT CARD DISPLAY AREA
   ═══════════════════════════════ */
.month-event-display {
  margin-top: 8px;
  min-height: 140px;
  position: relative;
}

.cal-event-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px 28px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08),
              0 2px 8px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.04);
  display: flex;
  align-items: flex-start;
  gap: 24px;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.23, 1, 0.32, 1);
  pointer-events: none;
}

.cal-event-card.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Red accent stripe on left */
.cal-event-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, #d32f2f, #ff5252);
  border-radius: 4px 0 0 4px;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(211, 47, 47, 0.12), rgba(211, 47, 47, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.4rem;
}

.card-body {
  flex: 1;
  min-width: 0;
}

.card-date-badge {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--primary-color, #d32f2f);
  background: rgba(211, 47, 47, 0.08);
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  display: inline-block;
  margin-bottom: 10px;
}

.card-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
  line-height: 1.4;
}

.card-tag {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  color: #666;
  letter-spacing: 0.5px;
}

.card-view-btn {
  margin-left: auto;
  align-self: center;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(211, 47, 47, 0.08);
  color: var(--primary-color, #d32f2f);
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background 0.3s ease, transform 0.3s ease;
}

.card-view-btn:hover {
  background: var(--primary-color, #d32f2f);
  color: #fff;
  transform: scale(1.1);
}

/* ═══════════════════════════════
   EVENT COUNT BADGE
   ═══════════════════════════════ */
.month-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.event-count-badge {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  color: #888;
  background: #eee;
  padding: 4px 12px;
  border-radius: 20px;
}

/* ═══════════════════════════════
   IMAGE LIGHTBOX MODAL
   ═══════════════════════════════ */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  max-width: 85vw;
  max-height: 85vh;
  transform: scale(0.9);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lightbox-overlay.active .lightbox-content {
  transform: scale(1);
}

.lightbox-content img {
  max-width: 100%;
  max-height: 85vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  object-fit: contain;
  display: block;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  width: 48px;
  height: 48px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease, transform 0.3s ease;
  z-index: 10000;
}

.lightbox-close:hover {
  background: rgba(211, 47, 47, 0.6);
  transform: scale(1.1);
}

/* ═══════════════════════════════
   RESPONSIVE
   ═══════════════════════════════ */
@media (max-width: 768px) {
  .strip-node {
    width: 96px;
  }

  .node-title {
    display: none;
  }

  .cal-event-card {
    flex-direction: column;
    gap: 16px;
  }

  .card-view-btn {
    align-self: flex-start;
    margin-left: 0;
  }
}

/* ═══════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  .cal-event-card {
    transition: none;
  }

  .cal-event-card.is-visible {
    opacity: 1;
    transform: none;
  }

  .strip-node,
  .node-dot,
  .node-date,
  .node-title,
  .node-tick {
    transition: none;
  }

  .timeline-hero-title,
  .timeline-hero-subtitle {
    opacity: 1;
    transform: none;
  }

  .lightbox-content {
    transform: scale(1);
  }
}

/* ═══════════════════════════════
   ALL EVENTS TABLE SECTION
   ═══════════════════════════════ */
.all-events-section {
  background: #ffffff;
  padding-top: 64px;
  padding-bottom: 80px;
}

.all-events-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: #1a1a1a;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.all-events-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  color: #666;
  text-align: center;
}

.table-responsive-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.06);
  background: #ffffff;
  margin-bottom: 32px;
}

.events-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-family: 'Inter', sans-serif;
}

.events-table th {
  background: var(--primary-color, #d32f2f);
  color: #ffffff;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 18px 24px;
}

.events-table td {
  padding: 16px 24px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.9rem;
  color: #444;
  vertical-align: middle;
}

.events-table tbody tr {
  transition: background 0.25s ease;
}

.events-table tbody tr:hover {
  background: rgba(211, 47, 47, 0.02);
}

/* Event Name Clickable Trigger */
.table-event-link {
  font-weight: 600;
  color: #1a1a1a;
  text-decoration: none;
  border: none;
  background: none;
  padding: 0;
  text-align: left;
  font-family: inherit;
  font-size: inherit;
}

.table-event-link.has-photo {
  cursor: pointer;
}

.table-event-link.has-photo:hover {
  color: var(--primary-color, #d32f2f);
}

.table-event-link .photo-indicator {
  margin-left: 8px;
  font-size: 0.95rem;
  display: inline-block;
  opacity: 0.6;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.table-event-link.has-photo:hover .photo-indicator {
  opacity: 1;
  transform: scale(1.15);
}

/* Category Badge in Table */
.table-cat-badge {
  display: inline-block;
  padding: 5px 12px;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(211, 47, 47, 0.06);
  color: var(--primary-color, #d32f2f);
  white-space: nowrap;
}

/* Toggle button styling */
.toggle-btn-container {
  display: flex;
  justify-content: center;
}

.view-complete-btn {
  background: transparent;
  color: var(--primary-color, #d32f2f);
  border: 2px solid var(--primary-color, #d32f2f);
  padding: 12px 32px;
  border-radius: 30px;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

.view-complete-btn:hover {
  background: var(--primary-color, #d32f2f);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(211, 47, 47, 0.2);
}

.view-complete-btn:active {
  transform: translateY(0);
}