html {
  scroll-behavior: smooth;
}

/* PAGE BACKGROUND */

.page-content {
  background:
    radial-gradient(
      circle at top right,
      rgba(38, 208, 206, 0.16),
      transparent 34%
    ),
    radial-gradient(
      circle at bottom left,
      rgba(0, 87, 120, 0.18),
      transparent 38%
    ),
    #002233;
  overflow-x: hidden;
  padding-top: 0px;
}

.scroll-container {
  display: flex;
  overflow: visible;
}

.panel {
  min-height: 800px;
  padding: 80px 8%;
  overflow: hidden;
  flex-direction: column;
  transform: none;
  transition: opacity 0.8s ease;
}

/* Alternate panel layout for odd and even panels */

.panel:nth-of-type(odd) {
  background:
    radial-gradient(
      circle at top right,
      rgba(38, 208, 206, 0.16),
      transparent 34%
    ),
    radial-gradient(
      circle at bottom left,
      rgba(0, 87, 120, 0.18),
      transparent 38%
    ),
    #002233;
}

.panel:nth-of-type(even) {
  background:
    radial-gradient(
      circle at top right,
      rgba(71, 191, 255, 0.16),
      transparent 34%
    ),
    radial-gradient(
      circle at bottom left,
      rgba(38, 208, 206, 0.12),
      transparent 38%
    ),
    #003344;
}

.panel-body p {
  text-indent: 50px;
  text-align: left;
}

.panel:nth-of-type(odd) .panel-graphic {
  float: left;
  margin: 0 32px 24px 0;
  box-shadow: 0 0 0px #2fbad6;
}

.panel:nth-of-type(even) .panel-graphic {
  float: right;
  margin: 0 0 24px 32px;
  box-shadow: 0 0 0px #2fbad6;
}

.panel-body::after {
  content: "";
  display: block;
  clear: both;
}

.panel-body {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px;
}

.panel-body p {
  max-width: none;
  margin: 0;
}

img.panel-graphic {
  position: relative;
  z-index: 1;
  max-width: 300px;
}

.panel-graphic {
  transition:
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.4s ease,
    filter 0.4s ease;
}

.panel-graphic:hover {
  z-index: 10;

  transform: translateY(-12px) scale(1.05);

  box-shadow:
    0 0 20px rgba(92, 225, 255, 0.4),
    0 0 40px rgba(92, 225, 255, 0.25);

  filter: brightness(1.05);
}

/* Section Formmating*/
.section-1 {
  z-index: 1;
  margin-top: 0px;
  padding-top: 100px;
}

h1 {
  font-size: clamp(48px, 8vw, 96px);
  line-height: 0.95;
  margin-bottom: 30px;
  font-weight: 700;
  background: linear-gradient(135deg, #5ce1ff, #4f6dff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: left;
}

p {
  max-width: 800px;
  font-size: 18px;
  line-height: 1.7;
  color: #b8d8ff;
  opacity: 0.95;
}

/* CROSS */
.cross {
  --cross-gradient: linear-gradient(135deg, #5ce1ff 0%, #4f6dff 100%);

  position: relative;

  width: 260px;
  height: 360px;

  background: transparent;
  isolation: isolate;
  z-index: 1;
  box-shadow:
    0 0 40px rgba(54, 216, 255, 0.75),
    0 0 80px rgba(54, 216, 255, 0.55),
    0 0 120px rgba(54, 216, 255, 0.35);
}

.cross::before {
  content: "";

  position: absolute;

  width: 240px;
  height: 70px;

  background: var(--cross-gradient);
  background-size: 260px 360px;
  background-position: -10px -70px;

  left: 50%;
  top: 70px;

  transform: translateX(-50%);

  z-index: 3;
}

.cross::after {
  content: "";

  position: absolute;

  width: 80px;
  height: 100%;

  background: var(--cross-gradient);
  background-size: 260px 360px;
  background-position: -90px 0;
  border-radius: 2px;

  left: 50%;
  top: 0;

  transform: translateX(-50%);

  z-index: 2;
}

.glow-horizontal {
  position: absolute;

  width: 260px;
  height: 80px;

  left: 50%;
  top: 70px;

  transform: translateX(-50%);

  background: rgba(54, 216, 255, 0.58);
  filter: blur(34px);
  pointer-events: none;

  box-shadow:
    0 0 40px rgba(54, 216, 255, 0.8),
    0 0 80px rgba(54, 216, 255, 0.6),
    0 0 140px rgba(54, 216, 255, 0.4);

  z-index: 1;
}

/* TIMELINE */

.section-4 {
  align-items: stretch;
  padding-bottom: 120px;
}

.section-4 h1 {
  text-align: center;
}

.timeline {
  position: relative;
  width: min(100%, 1100px);
  margin: 24px auto 0;
  display: grid;
  gap: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 34px;
  bottom: 34px;
  left: 50%;
  width: 6px;
  border-radius: 999px;
  background: linear-gradient(180deg, #5ce1ff, #4f6dff);
  box-shadow:
    0 0 24px rgba(92, 225, 255, 0.42),
    0 0 54px rgba(79, 109, 255, 0.28);
  transform: translateX(-50%);
}

.timeline-entry {
  position: relative;
  display: grid;
  grid-template-columns: minmax(160px, 1fr) 92px minmax(160px, 1fr);
  align-items: center;
  gap: 28px;
}

.timeline-entry:nth-child(even) .timeline-date {
  grid-column: 3;
  grid-row: 1;
  text-align: left;
}

.timeline-entry:nth-child(even) .timeline-card {
  grid-column: 1;
  grid-row: 1;
}

.timeline-date {
  color: #d4e7ff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
  text-align: right;
}

.timeline-marker {
  position: relative;
  z-index: 2;
  grid-column: 2;
  width: 92px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 8px solid rgba(255, 255, 255, 0.82);
  border-radius: 50%;
  background: radial-gradient(
    circle at 35% 28%,
    #ffffff,
    #dce8f5 48%,
    #b9c8d8 100%
  );
  box-shadow:
    0 0 0 7px rgba(92, 225, 255, 0.18),
    0 0 34px rgba(92, 225, 255, 0.5);
  animation: pulse 3s infinite;
}
@keyframes pulse {
  0%,
  100% {
    box-shadow:
      0 0 0 7px rgba(92, 225, 255, 0.18),
      0 0 34px rgba(92, 225, 255, 0.5);
  }

  50% {
    box-shadow:
      0 0 0 10px rgba(92, 225, 255, 0.3),
      0 0 50px rgba(92, 225, 255, 0.8);
  }
}

.timeline-card {
  position: relative;
  z-index: 1;
  min-height: 168px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 18px 46px rgba(0, 0, 0, 0.22),
    0 0 34px rgba(92, 225, 255, 0.12);
  backdrop-filter: blur(14px);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.timeline-card::before {
  content: "";
  position: absolute;
  top: 50%;
  width: 28px;
  border-top: 2px dotted rgba(184, 216, 255, 0.78);
}

.timeline-card:hover {
  transform: translateY(-6px);

  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.3),
    0 0 40px rgba(92, 225, 255, 0.25);
}

.timeline-entry:nth-child(odd) .timeline-card::before {
  right: -28px;
}

.timeline-entry:nth-child(even) .timeline-card::before {
  left: -28px;
}

.timeline-card h2 {
  margin: 0 0 12px;
  color: #ffffff;
  font-size: 24px;
  line-height: 1.15;
}

.section-4 .timeline-card p {
  max-width: none;
  margin-bottom: 14px;
  color: #d4e7ff;
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
}

.section-4 .timeline-card .timeline-skills {
  margin-bottom: 0;
  color: #5ce1ff;
  font-size: 14px;
  font-weight: 700;
}

.timeline-date,
.card-header-label {
  font-family: "JetBrains Mono", monospace;
}

/* RESPONSIVE DESIGN */

@media (max-width: 768px) {
  .section-1 {
    margin-top: 50px;
  }
  .container {
    padding: 90px 20px 60px;
  }

  .panel {
    padding: 70px 20px;
  }

  .panel > h1 {
    width: 100%;
    text-align: center;
  }

  .panel-body {
    border-width: 6px;
    padding: 10px;
  }

  img.panel-graphic {
    float: none;
    width: 100%;
    max-width: none;
    margin: 0 0 24px;
  }

  .panel:nth-of-type(odd) p,
  .panel:nth-of-type(even) p {
    text-align: left;
  }

  .cross {
    float: none;
    margin: 0 auto 32px;
  }

  .timeline {
    gap: 24px;
  }

  .timeline::before {
    left: 36px;
  }

  .timeline-entry,
  .timeline-entry:nth-child(even) {
    grid-template-columns: 72px minmax(0, 1fr);
    column-gap: 25px;
    row-gap: 16px;
  }

  .timeline-marker {
    grid-column: 1;
    width: 72px;
    border-width: 6px;
    font-size: 26px;
  }

  .timeline-date,
  .timeline-entry:nth-child(even) .timeline-date {
    grid-column: 2;
    grid-row: 1;
    text-align: left;
    align-self: center;
    font-size: 17px;
  }

  .timeline-card,
  .timeline-entry:nth-child(even) .timeline-card {
    grid-column: 2;
    grid-row: 2;
  }

  .timeline-card::before,
  .timeline-entry:nth-child(odd) .timeline-card::before,
  .timeline-entry:nth-child(even) .timeline-card::before {
    left: -16px;
    right: auto;
    width: 16px;
  }

  .timeline-card {
    padding: 22px;
  }

  h1 {
    font-size: 56px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 44px;
  }

  p {
    font-size: 15px;
  }
}