.about-slider-container {
  position: relative;
  max-width: 1000px;
  margin: 0.5rem auto;
  overflow: hidden;
  border-radius: 1rem;
}

.about-slider-wrapper {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.about-slide {
  min-width: 100%;
  padding: 2rem;
  box-sizing: border-box;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.about-slide.active,
.about-slide:first-child {
  opacity: 1;
}

.about-slider-nav {
  position: absolute;
  top: 20%;
  transform: translateY(-50%);
  background: linear-gradient(135deg, #4c51bf 0%, #434190 100%);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(76, 81, 191, 0.4);
  transition: all 0.3s ease;
}

.about-slider-nav:hover:not(:disabled) {
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 16px rgba(76, 81, 191, 0.6);
}

.about-slider-nav:active:not(:disabled) {
  transform: translateY(-50%) scale(0.95);
}

.about-slider-nav.prev {
  left: 1rem;
}

.about-slider-nav.next {
  right: 1rem;
}

.about-slider-nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  transform: translateY(-50%);
}

.about-slider-nav:disabled:hover {
  transform: translateY(-50%);
  box-shadow: 0 4px 12px rgba(76, 81, 191, 0.4);
}

.about-slider-indicators {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  padding: 1rem;
}

.about-slider-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #cbd5e0;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
}

.about-slider-indicator.active {
  background: linear-gradient(135deg, #4c51bf 0%, #434190 100%);
  width: 32px;
  border-radius: 6px;
}

.about-slider-section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  color: #2d3748;
  font-weight: 700;
  display: block;
  margin-top: 0;
}

.section-nav-bookmark {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  right: 1rem;
  left: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-nav-bookmark.expanded {
  max-width: 200px;
}

.section-nav-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 0.5rem;
  border-radius: 1rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(76, 81, 191, 0.2);
  transition: all 0.3s ease;
  overflow: hidden;
  width: 48px;
}

.section-nav-bookmark.expanded .section-nav-buttons {
  width: auto;
  min-width: 180px;
  padding: 1rem;
}

.section-nav-btn {
  background: linear-gradient(135deg, #4c51bf 0%, #434190 100%);
  color: white;
  border: none;
  padding: 0.6rem;
  border-radius: 0.5rem;
  font-size: 0;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(76, 81, 191, 0.3);
  white-space: nowrap;
  text-align: center;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  position: relative;
}

.section-nav-bookmark.expanded .section-nav-btn {
  font-size: 0.85rem;
  padding: 0.6rem 1rem;
  text-align: left;
  justify-content: flex-start;
}

.section-nav-btn::before {
  content: attr(data-icon);
  font-size: 1.2rem;
  display: block;
  line-height: 1;
}

.section-nav-bookmark.expanded .section-nav-btn::before {
  margin-right: 0.5rem;
  font-size: 1rem;
  display: inline-block;
}

.section-nav-btn:hover:not(.active) {
  transform: translateX(-3px) scale(1.05);
  box-shadow: 0 4px 12px rgba(76, 81, 191, 0.5);
}

.section-nav-btn.active {
  background: linear-gradient(135deg, #68d391 0%, #48bb78 100%);
  box-shadow: 0 4px 12px rgba(104, 211, 145, 0.5);
}

.section-nav-toggle {
  display: none;
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #4c51bf 0%, #434190 100%);
  color: white;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(76, 81, 191, 0.3);
  z-index: 1001;
  font-size: 1rem;
}

@media (max-width: 1200px) {
  .section-nav-bookmark {
    right: 2rem;
  }
}

@media (max-width: 768px) {
  .about-slider-nav {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .about-slider-nav.prev {
    left: 0.5rem;
  }

  .about-slider-nav.next {
    right: 0.5rem;
  }

  .about-slide {
    padding: 1.5rem;
  }

  .section-nav-bookmark {
    right: 0.5rem;
    max-height: 70vh;
  }

  .section-nav-bookmark.expanded .section-nav-buttons {
    min-width: 160px;
  }

  .section-nav-buttons {
    padding: 0.5rem;
    width: 40px;
  }

  .section-nav-btn {
    min-width: 32px;
    height: 32px;
    padding: 0.5rem;
  }

  .section-nav-bookmark.expanded .section-nav-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
  }
}