/* ==========================================================================
   Antigravity Portfolio - Experience Vertical Timeline Styles
   Clean, modern alternating center-spine timeline for freelance & clients
   ========================================================================== */

.experience-section {
  position: relative;
}

/* Timeline Outer Container */
.exp-timeline {
  position: relative;
  max-width: 1040px;
  margin: 4.5rem auto 2rem;
  padding: 1.5rem 0;
}

/* Central Vertical Spine (Desktop) */
.exp-timeline__spine {
  position: absolute;
  top: 1.5rem;
  bottom: 2rem;
  left: 50%;
  width: 3px;
  transform: translateX(-50%);
  background: linear-gradient(
    180deg,
    rgba(170, 112, 224, 0.85) 0%,
    rgba(108, 63, 197, 0.6) 75%,
    rgba(108, 63, 197, 0.08) 100%
  );
  box-shadow: 0 0 14px rgba(170, 112, 224, 0.4);
  border-radius: 999px;
  z-index: 1;
}

/* Timeline Item Row */
.exp-item {
  position: relative;
  width: 100%;
  display: flex;
  margin-bottom: 5.5rem;
  z-index: 2;
}

.exp-item:last-child {
  margin-bottom: 2rem;
}

/* Alternating Alignment */
.exp-item--left {
  justify-content: flex-start;
}

.exp-item--right {
  justify-content: flex-end;
}

/* Numbered Timeline Node (Center) */
.exp-item__node {
  position: absolute;
  left: 50%;
  top: 3.4rem;
  transform: translate(-50%, -50%);
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: var(--base-tint, #161618);
  border: 2px solid #aa70e0;
  box-shadow: 0 0 20px rgba(170, 112, 224, 0.4), inset 0 0 10px rgba(108, 63, 197, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.exp-item__node span {
  font: normal 800 1.6rem/1 var(--_font-accent, sans-serif);
  color: #f3e8ff;
  letter-spacing: -0.02em;
}

.exp-item:hover .exp-item__node {
  transform: translate(-50%, -50%) scale(1.15);
  border-color: #f3e8ff;
  box-shadow: 0 0 28px rgba(170, 112, 224, 0.75), inset 0 0 14px rgba(170, 112, 224, 0.4);
}

/* Experience Card */
.exp-item__card {
  position: relative;
  width: calc(50% - 4.5rem);
  background: var(--base-tint, #161618);
  border: 1px solid var(--stroke-elements, rgba(255, 255, 255, 0.12));
  border-radius: 2rem;
  padding: 3rem 3.2rem 2.8rem;
  box-shadow: 0 2rem 4.5rem -1.2rem rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.exp-item:hover .exp-item__card {
  transform: translateY(-4px);
  border-color: rgba(170, 112, 224, 0.45);
  box-shadow: 0 2.6rem 6rem -1.2rem rgba(108, 63, 197, 0.3), 0 0 0 1px rgba(170, 112, 224, 0.25);
}

/* Connecting Horizontal Stem (Desktop) */
.exp-item--left .exp-item__card::after {
  content: '';
  position: absolute;
  top: 3.4rem;
  right: -4.5rem;
  width: 4.5rem;
  height: 2px;
  background: linear-gradient(90deg, rgba(170, 112, 224, 0.55), #aa70e0);
  pointer-events: none;
}

.exp-item--right .exp-item__card::after {
  content: '';
  position: absolute;
  top: 3.4rem;
  left: -4.5rem;
  width: 4.5rem;
  height: 2px;
  background: linear-gradient(90deg, #aa70e0, rgba(170, 112, 224, 0.55));
  pointer-events: none;
}

/* Card Header / Meta */
.exp-item__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.exp-item__date {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.3rem;
  border-radius: 999px;
  background: rgba(170, 112, 224, 0.12);
  border: 1px solid rgba(170, 112, 224, 0.32);
  color: #c084fc;
  font: normal 700 1.25rem/1 var(--_font-default, sans-serif);
  letter-spacing: 0.02em;
}

.exp-item__client {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font: normal 600 1.3rem/1 var(--_font-default, sans-serif);
  color: var(--t-medium, #a1a1aa);
}

.exp-item__client i {
  color: #aa70e0;
  font-size: 1.4rem;
}

/* Role Title */
.exp-item__title {
  font: normal 800 2.2rem/1.25 var(--_font-accent, sans-serif);
  color: var(--t-bright, #ffffff);
  margin: 0 0 1.2rem 0;
  letter-spacing: -0.01em;
}

/* Description Text */
.exp-item__descr {
  font: normal 400 1.45rem/1.65 var(--_font-default, sans-serif);
  color: var(--t-medium, #a1a1aa);
  margin: 0 0 2rem 0;
}

/* Technology Badges */
.exp-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.exp-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1.1rem;
  border-radius: 0.8rem;
  background: var(--base, rgba(255, 255, 255, 0.05));
  border: 1px solid var(--stroke-elements, rgba(255, 255, 255, 0.1));
  color: var(--t-medium, #cbd5e1);
  font: normal 600 1.2rem/1 var(--_font-default, sans-serif);
  letter-spacing: 0.02em;
  transition: all 0.25s ease;
}

.exp-item:hover .exp-tag {
  border-color: rgba(170, 112, 224, 0.25);
  background: rgba(170, 112, 224, 0.08);
  color: #f3e8ff;
}

/* ==========================================================================
   Light Mode Support
   ========================================================================== */
[color-scheme="light"] .exp-item__node {
  background: #ffffff;
  border-color: #9333ea;
  box-shadow: 0 0 18px rgba(147, 51, 234, 0.25), inset 0 0 8px rgba(147, 51, 234, 0.1);
}

[color-scheme="light"] .exp-item__node span {
  color: #6b21a8;
}

[color-scheme="light"] .exp-item__card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 2rem 4rem -1rem rgba(108, 63, 197, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

[color-scheme="light"] .exp-item:hover .exp-item__card {
  border-color: #9333ea;
  box-shadow: 0 2.5rem 5rem -1rem rgba(147, 51, 234, 0.2), 0 0 0 1px rgba(147, 51, 234, 0.25);
}

[color-scheme="light"] .exp-item__title {
  color: #111114;
}

[color-scheme="light"] .exp-item__descr {
  color: #4b5563;
}

[color-scheme="light"] .exp-item__client {
  color: #64748b;
}

[color-scheme="light"] .exp-item__date {
  background: rgba(147, 51, 234, 0.09);
  border-color: rgba(147, 51, 234, 0.25);
  color: #7e22ce;
}

[color-scheme="light"] .exp-tag {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.08);
  color: #475569;
}

[color-scheme="light"] .exp-item:hover .exp-tag {
  background: rgba(147, 51, 234, 0.08);
  border-color: rgba(147, 51, 234, 0.25);
  color: #6b21a8;
}

/* ==========================================================================
   Mobile & Tablet Responsiveness (Single Column Layout)
   ========================================================================== */
@media only screen and (max-width: 991px) {
  .exp-timeline {
    margin-top: 3.5rem;
    padding-left: 0;
  }

  /* Shift vertical spine to left */
  .exp-timeline__spine {
    left: 2.4rem;
    transform: none;
  }

  .exp-item {
    display: block;
    margin-bottom: 4.2rem;
  }

  /* Node positioned on left spine */
  .exp-item__node {
    left: 2.4rem;
    top: 3.4rem;
    transform: translate(-50%, -50%);
  }

  .exp-item:hover .exp-item__node {
    transform: translate(-50%, -50%) scale(1.12);
  }

  /* Cards positioned on the right */
  .exp-item__card {
    width: calc(100% - 5.5rem);
    margin-left: 5.5rem;
    padding: 2.6rem 2.4rem 2.2rem;
  }

  /* Remove desktop right connector and standardize left connector */
  .exp-item--left .exp-item__card::after,
  .exp-item--right .exp-item__card::after {
    top: 3.4rem;
    right: auto;
    left: -3.1rem;
    width: 3.1rem;
    background: linear-gradient(90deg, #aa70e0, rgba(170, 112, 224, 0.55));
  }
}

@media only screen and (max-width: 576px) {
  .exp-timeline__spine {
    left: 2rem;
  }

  .exp-item__node {
    left: 2rem;
    width: 4rem;
    height: 4rem;
    top: 3rem;
  }

  .exp-item__node span {
    font-size: 1.35rem;
  }

  .exp-item__card {
    width: calc(100% - 4.6rem);
    margin-left: 4.6rem;
    padding: 2.2rem 1.8rem 1.8rem;
    border-radius: 1.6rem;
  }

  .exp-item--left .exp-item__card::after,
  .exp-item--right .exp-item__card::after {
    top: 3rem;
    left: -2.6rem;
    width: 2.6rem;
  }

  .exp-item__title {
    font-size: 1.9rem;
  }

  .exp-item__descr {
    font-size: 1.35rem;
    line-height: 1.6;
    margin-bottom: 1.6rem;
  }

  .exp-item__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }
}

@media only screen and (max-width: 375px) {
  .exp-timeline__spine {
    left: 1.8rem;
  }

  .exp-item__node {
    left: 1.8rem;
    width: 3.6rem;
    height: 3.6rem;
    top: 2.8rem;
  }

  .exp-item__node span {
    font-size: 1.25rem;
  }

  .exp-item__card {
    width: calc(100% - 4rem);
    margin-left: 4rem;
    padding: 1.8rem 1.4rem 1.4rem;
    border-radius: 1.4rem;
  }

  .exp-item--left .exp-item__card::after,
  .exp-item--right .exp-item__card::after {
    top: 2.8rem;
    left: -2.2rem;
    width: 2.2rem;
  }

  .exp-item__title {
    font-size: 1.75rem;
  }

  .exp-tag {
    font-size: 1.1rem;
    padding: 0.35rem 0.8rem;
  }
}