/* ========================================
   Centered Alternating Timeline
   ======================================== */

/* Color variables for timeline types */
.tl-center {
  --tl-color: #49b1f5;
  --tl-bg: rgba(73, 177, 245, 0.15);
}
.tl-center.red { --tl-color: #ff7242; --tl-bg: rgba(255, 114, 66, 0.15); }
.tl-center.orange { --tl-color: #ff9800; --tl-bg: rgba(255, 152, 0, 0.15); }
.tl-center.yellow { --tl-color: #ffc107; --tl-bg: rgba(255, 193, 7, 0.15); }
.tl-center.green { --tl-color: #00c853; --tl-bg: rgba(0, 200, 83, 0.15); }
.tl-center.blue { --tl-color: #2196f3; --tl-bg: rgba(33, 150, 243, 0.15); }
.tl-center.cyan { --tl-color: #00bcd4; --tl-bg: rgba(0, 188, 212, 0.15); }
.tl-center.purple { --tl-color: #9c27b0; --tl-bg: rgba(156, 39, 176, 0.15); }

/* Container */
.tl-center {
  position: relative;
  margin: 20px 0 30px;
  padding: 0;
}

/* Central vertical line */
.tl-center::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 100%;
  background: var(--tl-color);
  border-radius: 2px;
}

/* Each timeline item */
.tl-center .tl-center-item {
  position: relative;
  width: 50%;
  padding: 0 0 25px;
  box-sizing: border-box;
}

/* Dot on the center line */
.tl-center .tl-center-item .tl-center-dot {
  position: absolute;
  top: 15px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--card-bg, #fff);
  border: 3px solid var(--tl-color);
  z-index: 1;
  transition: all 0.3s;
}

.tl-center .tl-center-item:hover .tl-center-dot {
  border-color: var(--tl-color);
  background: var(--tl-color);
  box-shadow: 0 0 8px var(--tl-color);
}

/* Content card */
.tl-center .tl-center-item .tl-center-content {
  padding: 15px 20px;
  border-radius: 10px;
  background: var(--tl-bg);
  position: relative;
  transition: all 0.3s;
}

.tl-center .tl-center-item:hover .tl-center-content {
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

/* Arrow on content card */
.tl-center .tl-center-item .tl-center-content::before {
  content: '';
  position: absolute;
  top: 16px;
  width: 0;
  height: 0;
  border: 8px solid transparent;
}

/* ---- Left side items ---- */
.tl-center .tl-center-item.left {
  left: 0;
  padding-right: 35px;
}

.tl-center .tl-center-item.left .tl-center-dot {
  right: -7px;
}

.tl-center .tl-center-item.left .tl-center-content::before {
  right: -16px;
  border-left-color: var(--tl-bg);
}

/* ---- Right side items ---- */
.tl-center .tl-center-item.right {
  left: 50%;
  padding-left: 35px;
}

.tl-center .tl-center-item.right .tl-center-dot {
  left: -7px;
}

.tl-center .tl-center-item.right .tl-center-content::before {
  left: -16px;
  border-right-color: var(--tl-bg);
}

/* ---- Headline (year) ---- */
.tl-center .tl-center-item.headline {
  width: auto;
  left: 0;
  padding: 0 0 25px;
  text-align: center;
}

.tl-center .tl-center-item.headline .tl-center-dot {
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 18px;
  border-width: 4px;
}

.tl-center .tl-center-item.headline .tl-center-content {
  display: inline-block;
  background: var(--tl-color);
  color: #fff;
  padding: 6px 20px;
  border-radius: 20px;
  margin-top: 40px;
}

.tl-center .tl-center-item.headline .tl-center-content::before {
  display: none;
}

.tl-center .tl-center-item.headline .tl-center-title p {
  margin: 0;
  font-weight: 700;
  font-size: 1.25em;
  color: #fff;
}

/* Title styling */
.tl-center .tl-center-title p {
  margin: 0 0 6px;
  font-weight: 600;
  font-size: 1em;
  color: var(--tl-color);
}

/* Body styling */
.tl-center .tl-center-body {
  font-size: 0.92em;
  line-height: 1.7;
}

.tl-center .tl-center-body > :last-child {
  margin-bottom: 0;
}

.tl-center .tl-center-body a {
  color: var(--tl-color);
  text-decoration: none;
  border-bottom: 1px dashed var(--tl-color);
  transition: all 0.3s;
}

.tl-center .tl-center-body a:hover {
  border-bottom-style: solid;
}

/* ---- Spacing between multiple timeline_center blocks ---- */
.tl-center + .tl-center {
  margin-top: -10px;
}

/* ---- Mobile responsive: collapse to single column ---- */
@media screen and (max-width: 768px) {
  .tl-center::before {
    left: 15px;
  }

  .tl-center .tl-center-item.left,
  .tl-center .tl-center-item.right {
    width: 100%;
    left: 0;
    padding-left: 40px;
    padding-right: 0;
  }

  .tl-center .tl-center-item.left .tl-center-dot,
  .tl-center .tl-center-item.right .tl-center-dot {
    left: 8px;
    right: auto;
  }

  .tl-center .tl-center-item.left .tl-center-content::before {
    right: auto;
    left: -16px;
    border-left-color: transparent;
    border-right-color: var(--tl-bg);
  }

  .tl-center .tl-center-item.headline {
    text-align: left;
    padding-left: 40px;
  }

  .tl-center .tl-center-item.headline .tl-center-dot {
    left: 6px;
    transform: none;
  }
}