/* =========================================
   Modern Timeline Layout for TrackRecord
========================================= */

/* Timeline Container */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto 60px;
  padding: 40px 20px;
}

/* The central vertical line */
.timeline::after {
  content: '';
  position: absolute;
  width: 4px;
  background: linear-gradient(180deg, rgba(15,23,32,0.05) 0%, rgba(15,23,32,0.15) 50%, rgba(15,23,32,0.05) 100%);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -2px;
  border-radius: 4px;
}

/* Individual timeline items */
.timeline-item {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
  margin-bottom: 20px;
  box-sizing: border-box;
}

/* Alternating positioning for PC */
.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

/* The dot/icon on the timeline */
.timeline-dot {
  position: absolute;
  width: 44px;
  height: 44px;
  right: -22px;
  top: 24px;
  background: #ffffff;
  border: 4px solid var(--item-color, #64748b);
  border-radius: 50%;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -22px;
}

.timeline-dot .material-symbols-outlined {
  color: var(--item-color, #64748b);
  font-size: 24px !important;
  margin: 0;
}

/* The content card */
.timeline-content {
  padding: 24px 30px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 8px 32px rgba(11, 18, 32, 0.06);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
  overflow: hidden;
}

/* Colored accent line on the card (top border) */
.timeline-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--item-color, #64748b);
  opacity: 0.8;
}

/* Hover effects */
.timeline-item-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.timeline-item-link:hover .timeline-content {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(11, 18, 32, 0.12);
  border-color: rgba(255, 255, 255, 0.9);
}

.timeline-item-link:hover .timeline-dot {
  transform: scale(1.15);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.timeline-item-link:active .timeline-content {
  transform: translateY(-2px);
}

/* Content details */
.timeline-date {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--item-color, #64748b);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.timeline-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: #1e293b;
  margin: 0 0 8px 0;
  line-height: 1.4;
}

.timeline-subtitle {
  font-size: 1rem;
  font-weight: 600;
  color: #475569;
  margin: 0;
  line-height: 1.6;
}

.timeline-icon-corner {
  position: absolute;
  right: 16px;
  bottom: 16px;
  font-size: 24px;
  color: #94a3b8;
  opacity: 0;
  transform: translate(-10px, 10px);
  transition: all 0.3s ease;
}

.timeline-item-link:hover .timeline-icon-corner {
  opacity: 0.8;
  transform: translate(0, 0);
  color: var(--item-color, #64748b);
}

/* Glow effect underneath the dot */
.timeline-dot::before {
  content: '';
  position: absolute;
  inset: -8px;
  background: var(--item-color, #64748b);
  border-radius: 50%;
  z-index: -1;
  opacity: 0.15;
  filter: blur(6px);
  transition: opacity 0.3s ease;
}

.timeline-item-link:hover .timeline-dot::before {
  opacity: 0.3;
}

/* Page Header Adjustments */
.track-record-header {
  text-align: center;
  margin: 40px 0 20px;
}

.track-record-header h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.track-record-header p {
  font-size: 1.1rem;
  color: #64748b;
  max-width: 600px;
  margin: 0 auto;
}

/* =========================================
   Responsive Design (Mobile)
========================================= */
@media screen and (max-width: 768px) {
  .timeline::after {
    left: 24px; /* Move line to the left */
  }

  .timeline-item {
    width: 100%;
    padding-left: 60px; /* Make space for the line and dot */
    padding-right: 15px;
  }

  .timeline-item:nth-child(even),
  .timeline-item:nth-child(odd) {
    left: 0;
  }

  .timeline-dot {
    left: 2px !important;
    right: auto;
    width: 36px;
    height: 36px;
    top: 26px;
    border-width: 3px;
  }
  
  .timeline-dot .material-symbols-outlined {
    font-size: 20px !important;
  }

  .timeline-content {
    padding: 20px 20px;
  }
  
  .timeline-title {
    font-size: 1.15rem;
  }
  
  .timeline-subtitle {
    font-size: 0.95rem;
  }
}