/* Key Features Section Styles - Grid Rebuild */
.key-features-section {
  background-color: var(--white);
  color: #0b161a;
  position: relative;
  padding-top: var(--space-20);
  padding-bottom: var(--space-32);
}

/* Grid Container */
.kf-grid-container {
  max-width: 1536px;
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: grid;
  grid-template-columns: 280px 1fr; 
  /* Auto row for header, 1fr for content */
  grid-template-rows: auto 1fr;
  gap: var(--space-10); /* 40px gap */
  position: relative;
  align-items: start;
}

/* --- Left Column: Label --- */
.kf-cell-label {
  grid-column: 1;
  /* Span all rows so the sticky label persists for the entire section height */
  grid-row: 1 / -1; 
  height: 100%; /* Fill grid height */
}

.kf-sticky-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  color: #64748b;
  position: sticky;
  top: 100px;
}

.kf-dot {
  width: 10px; 
  height: 10px;
  background-color: currentColor;
  border-radius: 50%;
  display: block;
}

/* --- Right Column Row 1: Headline --- */
.kf-cell-headline {
  grid-column: 2;
  grid-row: 1;
  padding-bottom: var(--space-12);
}

.kf-headline {
  font-size: 40px;
  font-weight: 400;
  color: #0b161a;
  line-height: 1.1;
  max-width: 100%;
}

/* --- Right Column Row 2: Content (cards + list) --- */
.kf-cell-cards {
  grid-column: 2;
  grid-row: 2;
  position: relative; /* Anchor for absolute list */
}

/* Absolute List Container */
/* Positions the list visually in Column 1, below the Label */
.kf-list-container {
  position: absolute;
  top: 0;
  /* Left position: -1 * (Col 1 Width + Grid Gap) */
  /* Col 1 = 280px. Gap = space-10 = 2.5rem = 40px. */
  left: calc(-280px - 40px);
  width: 280px;
  height: 100%; /* Match height of cards container */
  /* Ensure it doesn't overlap if content is weird, but standard flow is fine */
  pointer-events: none; /* Allow click through if needed, but li has pointer-events: auto */
}

.kf-sticky-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  list-style: none;
  position: sticky;
  top: 160px; /* Below the label */
  pointer-events: auto; /* Re-enable clicks */
}

.kf-nav-item {
  font-size: 16px;
  color: #94a3b8;
  cursor: pointer;
  transition: color 0.2s ease;
  padding: 4px 0;
}

.kf-nav-item:hover,
.kf-nav-item.active {
  color: #0b161a;
  font-weight: 500;
}

/* Content Wrapper */
.kf-cards-wrapper {
  display: flex;
  flex-direction: column;
  padding-bottom: 20vh;
}

/* Card Styles */
.kf-card {
  background-color: #f8fafc; 
  border-radius: 12px;
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  
  /* Sticky Stacking */
  position: sticky;
  top: 140px; 
  
  /* Stagger Effect */
  /* Using top calc for visual stagger in strict mode */
  top: calc(140px + var(--stagger, 0rem));
  margin-top: var(--stagger, 0rem); 
  
  margin-bottom: 40vh;
  box-shadow: none;
  z-index: 10; /* Above list container */
  background-clip: padding-box; /* crisp formatting */
}

/* Every odd card gets a slightly different background */
.kf-card:nth-child(odd) {
  background-color: #f1f5f9;
}

.kf-card-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
}

.kf-card-title {
  font-size: 32px;
  font-weight: 400;
  color: #0b161a;
  margin-bottom: 0;
}

.kf-card-desc {
  font-size: 18px;
  color: #64748b;
  line-height: 1.6;
  padding-left: 20px;
  border-left: 4px solid #a78bfa;
}

.kf-card-visual {
  width: 100%;
  display: flex;
  justify-content: flex-end;
}

.kf-image-container {
  width: 100%;
  aspect-ratio: 1/1;
  border-radius: 8px;
  overflow: hidden;
  background-color: #e2e8f0;
}

.kf-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Ensure last card doesn't add extra scroll space so sticky label stops */
.kf-card:last-child {
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 1023px) {
  .kf-grid-container {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .kf-cell-label { grid-row: 1; grid-column: 1; height: auto; }
  .kf-cell-headline { grid-row: 2; grid-column: 1; }
  .kf-cell-cards { grid-row: 3; grid-column: 1; }

  /* Hide absolutely positioned list on mobile */
  .kf-list-container { display: none; }

  .kf-card {
    grid-template-columns: 1fr;
    position: static;
    margin-top: 0;
    top: auto;
    gap: 32px;
    padding: 24px;
    margin-bottom: 24px;
  }
}