/* ==========================================================================
   base2ace Academy - Landing Page Styles (`index.html`)
   ========================================================================== */

/* Hero Section */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: #93c5fd;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title span.highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Feature Highlights Grid */
.features-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--bg-surface-border);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: var(--transition);
}

.feature-box:hover {
  background: var(--bg-card-hover);
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-3px);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.feature-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.feature-info p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Data Structure Catalog Grid */
.catalog-section {
  margin-top: 3.5rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.3rem;
}

.ds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.ds-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.ds-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  transition: var(--transition);
}

.ds-card.active-card::before {
  background: linear-gradient(to right, var(--primary), var(--secondary));
}

.ds-card.active-card:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.ds-card.locked-card {
  opacity: 0.75;
}

.ds-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.ds-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.ds-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.ds-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.ds-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.ds-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-surface-border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-code);
  color: var(--text-muted);
}

.ds-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--bg-surface-border);
}

/* Mobile Responsive Adjustments for Landing Page */
@media (max-width: 768px) {
  .hero {
    padding: 2.5rem 0 1.5rem;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.25;
  }
  .hero-description {
    font-size: 0.98rem;
    margin-bottom: 1.75rem;
  }
  .catalog-grid {
    grid-template-columns: 1fr;
  }
  .features-row {
    grid-template-columns: 1fr;
  }
}