/* ============================================
   LANDING PAGE - ABOUT SECTION
   Full Dark Mode with Elevated Cards
   ============================================ */

.about-section {
  padding: var(--section-padding) 4rem;
  background: var(--color-bg-elevated);
  position: relative;
  overflow: hidden;
}

/* Subtle accent glow */
.about-section::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center,
      var(--color-accent-subtle) 0%,
      transparent 70%);
  pointer-events: none;
}

.about-container {
  max-width: var(--content-max);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ========== SECTION TITLE ========== */
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 3rem;
  text-align: center;
  letter-spacing: -0.02em;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: 1.5rem auto 0;
  border-radius: var(--radius-full);
}

/* ========== SECTION SUBTITLE ========== */
.section-subtitle {
  text-align: center;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin-top: -1.5rem;
  margin-bottom: 3rem;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* ========== ABOUT GRID ========== */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
  align-items: start;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about-text p {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text-muted);
}

.about-text p:first-child {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.7;
}

/* ========== STATS CARD ========== */
.about-stats {
  background: var(--color-bg-card);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  position: sticky;
  top: 2rem;
}

.stat-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.stat-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-item:first-child {
  padding-top: 0;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

/* ========== FEATURE CARDS ========== */
.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-bg-card);
  padding: 2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-light);
  background: var(--color-bg-hover);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: scale(1.05);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-accent);
  transition: stroke var(--transition-base);
}

.feature-card:hover .feature-icon svg {
  stroke: var(--color-white);
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.625rem;
}

.feature-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ========== LAB IMAGE ========== */
.lab-image-wrapper {
  position: relative;
  max-width: 900px;
  margin: 0 auto 4rem;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

.lab-image {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(20%);
  transition: filter var(--transition-slow);
}

.lab-image-wrapper:hover .lab-image {
  filter: grayscale(0%);
}

.lab-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
      transparent 0%,
      transparent 50%,
      rgba(10, 10, 10, 0.6) 100%);
  pointer-events: none;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 968px) {
  .about-section {
    padding: var(--section-padding) 2rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-stats {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .stat-item {
    border-bottom: none;
    border-right: 1px solid var(--color-border);
    padding: 0 1rem;
    text-align: center;
  }

  .stat-item:last-child {
    border-right: none;
  }

  .about-features {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

@media (max-width: 768px) {
  .about-section {
    padding: var(--section-padding-sm) 1.25rem;
  }

  .section-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: 1.5rem;
  }

  .section-title::after {
    width: 50px;
    height: 2px;
    margin-top: 1rem;
  }

  .section-subtitle {
    font-size: 0.9375rem;
    margin-top: -1rem;
    margin-bottom: 2rem;
  }

  .about-grid {
    gap: 1.5rem;
    margin-bottom: 2.5rem;
  }

  .about-text {
    gap: 1rem;
  }

  .about-text p {
    font-size: 0.9375rem;
    line-height: 1.75;
  }

  .about-text p:first-child {
    font-size: 1.0625rem;
  }

  .about-stats {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 1.5rem;
  }

  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .stat-item:first-child {
    padding-top: 0;
  }

  .stat-number {
    font-size: 2rem;
    order: 2;
  }

  .stat-label {
    font-size: 0.75rem;
    order: 1;
  }

  .about-features {
    gap: 0.875rem;
  }

  .feature-card {
    padding: 1.25rem;
  }

  .feature-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 1rem;
  }

  .feature-icon svg {
    width: 20px;
    height: 20px;
  }

  .feature-title {
    font-size: 1.0625rem;
    margin-bottom: 0.5rem;
  }

  .feature-desc {
    font-size: 0.875rem;
  }

  .lab-image-wrapper {
    margin-bottom: 2rem;
    border-radius: var(--radius-lg);
  }
}

@media (max-width: 480px) {
  .about-section {
    padding: var(--section-padding-sm) 1rem;
  }

  .section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 1.25rem;
  }

  .section-subtitle {
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
  }

  .about-text p {
    font-size: 0.875rem;
  }

  .about-text p:first-child {
    font-size: 1rem;
  }

  .about-stats {
    padding: 1.25rem;
    border-radius: var(--radius-md);
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }

  .feature-card {
    padding: 1rem;
  }

  .feature-icon {
    width: 40px;
    height: 40px;
  }

  .feature-icon svg {
    width: 18px;
    height: 18px;
  }

  .feature-title {
    font-size: 1rem;
  }

  .feature-desc {
    font-size: 0.8125rem;
    line-height: 1.6;
  }

  .lab-image-wrapper {
    border-radius: var(--radius-md);
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .feature-card:hover {
    transform: none;
  }

  .feature-card:hover .feature-icon {
    transform: none;
    background: var(--color-bg-elevated);
    border-color: var(--color-border);
  }

  .feature-card:hover .feature-icon svg {
    stroke: var(--color-accent);
  }
}