.world-container {
  max-width: 1200px;
  min-height: 100vh;
  margin: 2rem auto;
  padding: 0 1rem;
}

.hero {
  padding: 3.8rem 1rem 1rem 1rem;
  text-align: center;
  background: var(--gradient-bg);
  border-bottom: var(--border-thin);
  position: relative;
  overflow: hidden;
  animation: titleGlow 3s ease-in-out infinite alternate;
}

.hero h1 {
  font-family: var(--my-font);
  font-size: var(--font-size-xxl);
  color: var(--text-color-default);
}

.hero p {
  font-size: var(--font-size-md);
  color: var(--text-color-default);
  max-width: 600px;
  margin: 0 auto;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 2rem 0 1rem;
  position: relative;
  z-index: 1;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  border: var(--border-thin);
  border-radius: var(--border-radius-default);
  color: var(--text-color-default);
  text-align: left;
  cursor: pointer;
  transition: var(--timing-normal);
  position: relative;
  overflow: hidden;
}

.filter-btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--default-overlay);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--timing-normal);
  pointer-events: none;
}

.filter-btn:hover::after {
  transform: scaleX(1);
}

.filter-btn.active {
  background: var(--primary-btn);
  color: var(--btn-accent);
}

.filter-btn:hover {
  border: 1px solid var(--accent-color);
}

.filter-btn i {
  margin-right: 0.5rem;
}

.world-grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.world-card {
  position: relative;
  border-radius: var(--border-radius-default);
  border: var(--border-thin);
  overflow: hidden;
  min-height: 520px;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    box-shadow 0.5s ease;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.world-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.5s ease;
  z-index: 4;
}

.world-card:hover::after {
  transform: scaleX(1);
}

.world-card:hover {
  transform: var(--translateY-up);
  box-shadow: var(--shadow-hover);
}

.world-image {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.world-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.world-card:hover .world-image img {
  transform: scale(1.05);
}

.world-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
      rgba(0, 0, 0, 0.96) 0%,
      rgba(0, 0, 0, 0.7) 40%,
      rgba(0, 0, 0, 0.25) 70%,
      transparent 100%);
  transition: opacity 0.5s ease;
}

.world-card:hover .world-image::after {
  opacity: 0.85;
}

.world-content {
  position: relative;
  z-index: 2;
  padding: 2.5rem 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.world-tagline {
  color: var(--accent-color);
  font-size: var(--font-size-xs);
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: 0.9;
}

.world-title {
  font-family: var(--my-font);
  font-size: var(--font-size-xl);
  color: #fff;
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  position: relative;
  padding-bottom: 0.6rem;
}

.world-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.world-card:hover .world-title::after {
  width: 100%;
}

.world-desc {
  color: var(--text-color-default);
  font-size: var(--font-size-xs);
  line-height: var(--line-height);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.5s ease, opacity 0.4s ease;
}

.world-card:hover .world-desc {
  max-height: 200px;
  opacity: 1;
}

.world-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.action-btn {
  flex: 1;
  border: var(--border-thin);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-default);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: var(--timing-normal);
  position: relative;
  overflow: hidden;
}

.action-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent-overlay);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--timing-normal);
}

.action-btn:hover::before {
  transform: scaleX(1);
}

.action-btn span,
.action-btn i {
  position: relative;
  z-index: 1;
}

.primary-btn {
  background: var(--primary-btn);
  color: var(--text-color-default);
}

.secondary-btn {
  background: var(--secondary-btn);
  color: var(--text-color-default);
}

.primary-btn:hover,
.secondary-btn:hover {
  border-color: var(--accent-color);
}

.action-btn i {
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.action-btn:hover i {
  transform: scale(1.25) rotate(-5deg);
}

@media (max-width: 768px) {
  .world-card {
    min-height: 420px;
  }

  .world-content {
    padding: 1.75rem 1.5rem 1.5rem;
  }

  .world-desc {
    max-height: 150px;
    opacity: 1;
  }

  .world-actions {
    flex-direction: column;
  }

  .filter-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 500px) {
  .filter-btn {
    flex: 1 1 40%;
  }
}