.quarto-document-content,
body {
  background-color: #1c1c1c;
  color: #ffffff;
}

h1.title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  text-align: center;
}

.quarto-title {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.35rem;
}

.quarto-title::before {
  content: "";
  display: block;
  width: clamp(80px, 10vw, 140px);
  height: clamp(80px, 10vw, 140px);
  background: url("../assets/images/logo_w_lowres.png") center/contain no-repeat;
  flex: 0 0 auto;
}

.quarto-title::after {
  content: "astrostatacademy@gmail.com";
  order: 1;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: none;
  opacity: 0.8;
  margin-top: -0.1rem;
}

.quarto-title > h1 {
  order: 2;
}

@media (max-width: 640px) {
  .quarto-title {
    text-align: center;
  }
}

.layout-row {
  display: flex;
  justify-content: space-between;
  gap: 4rem;
  margin-top: 2rem;
}

.panel {
  width: 45%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.bubble {
  padding: 1.2rem 1.5rem;
  border-radius: 1.5rem;
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  line-height: 1.35;
  width: 100%;
  box-sizing: border-box;
}

.panel img{
  display: block;
  margin: 0 auto;
  max-width: 100%;
  width: 100%;
  height: 240px;
  object-fit: contain;
  filter: invert(1); /* invert image colors */
}

.panel .alert {
  background-color: var(--bs-list-group-active-bg);
  color: var(--bs-list-group-active-color);
  border-color: var(--bs-list-group-active-border-color);
}

.section-spacer {
  height: 2.5rem;
  width: min(60%, 480px);
  margin: 1.5rem auto 2.5rem;
  background: linear-gradient(90deg, transparent, currentColor 25%, currentColor 75%, transparent);
  opacity: 0.2;
  border-radius: 999px;
}

.hero-text {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 10vh;
  font-size: clamp(1.5rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  text-align: center;
  margin: 2.5rem 0;
}

.hero-subtitle {
  font-size: 2em;
}


.centered-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.centered-image img {
  display: block;
  max-width: min(70%, 560px);
  height: auto;
}

.centered-image video {
  display: block;
  max-width: min(75%, 720px);
  height: auto;
}

.topics-section {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
}

.topics-table {
  border-collapse: separate;
  border-spacing: 2.5rem 0;
}

.topics-cell {
  background: #b6d64a;
  color: #111111;
  padding: 2rem 2.5rem;
  text-align: center;
  vertical-align: top;
  min-width: min(40vw, 360px);
}

.topics-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
}

.topics-list {
  font-size: 1.15rem;
  line-height: 1.6;
}

.table,
.table > :not(caption) > * > * {
  background-color: transparent !important;
}

.table {
  --bs-table-bg: transparent;
  --bs-table-striped-bg: transparent;
  --bs-table-active-bg: transparent;
  --bs-table-hover-bg: transparent;
}

.table-hover tbody tr:hover > * {
  background-color: transparent !important;
}

.table thead,
.table tbody,
.table tfoot,
.table tr,
.table th,
.table td {
  background-color: transparent !important;
}

.topics-spacer {
  width: 3rem;
}

@media (max-width: 900px) {
  .topics-table {
    border-spacing: 0;
  }

  .topics-cell {
    display: block;
    width: 100%;
    min-width: auto;
    margin: 0 0 1.5rem;
  }

  .topics-spacer {
    display: none;
  }
}

.timeline {
  position: relative;
  max-width: 960px;
  margin: 2.5rem auto 3rem;
  padding: 0 1rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: currentColor;
  opacity: 0.35;
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  margin: 2rem 0;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  background: currentColor;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.08);
}

.timeline-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.04);
}

.timeline-card img {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
  object-position: center;
  border-radius: 0.5rem;
}

.timeline-date {
  position: absolute;
  top: 50%;
  max-width: 40%;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.75;
  transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-card {
  grid-column: 1;
  text-align: right;
}

.timeline-item:nth-child(odd) .timeline-date {
  left: calc(50% + 32px);
  text-align: left;
}

.timeline-item:nth-child(odd) .timeline-card::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -40px;
  width: 40px;
  height: 2px;
  background: currentColor;
  opacity: 0.35;
  transform: translateY(-50%);
}

.timeline-item:nth-child(even) .timeline-card {
  grid-column: 3;
  text-align: left;
}

.timeline-item:nth-child(even) .timeline-date {
  right: calc(50% + 32px);
  text-align: right;
}

.timeline-item:nth-child(even) .timeline-card::after {
  content: "";
  position: absolute;
  top: 50%;
  left: -40px;
  width: 40px;
  height: 2px;
  background: currentColor;
  opacity: 0.35;
  transform: translateY(-50%);
}

@media (max-width: 720px) {
  .timeline {
    padding-left: 2.5rem;
  }

  .timeline::before {
    left: 24px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-dot {
    left: 24px;
  }

  .timeline-card {
    grid-column: 1;
    text-align: left;
  }

  .timeline-date {
    position: static;
    max-width: none;
    margin: 0.5rem 0 0 1.5rem;
    text-align: left;
    transform: none;
  }

  .timeline-card::after {
    left: -32px;
    right: auto;
    width: 32px;
  }
}