/* Layout & Grid System for Key Finders Luxury Website */

/* Containers */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 6rem);
}

.container-fluid {
  width: 100%;
  padding-inline: clamp(1rem, 3vw, 4rem);
}

/* Sections Base (Architectural and spacious margins) */
section {
  position: relative;
  padding-block: clamp(4rem, 10vw, 9rem);
  overflow: hidden;
}

.section-full {
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* Header & Navigation Layout */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height-full);
  z-index: 100;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: height var(--transition-normal), 
              background-color var(--transition-normal), 
              border-color var(--transition-normal),
              transform var(--transition-normal);
}

.site-header.shrink {
  height: var(--header-height-shrink);
  background-color: hsla(var(--color-charcoal-hsl), 0.95);
  backdrop-filter: blur(10px);
  border-color: hsla(var(--color-warm-white-hsl), 0.08);
}

.site-header.hide {
  transform: translateY(-100%);
}

.header-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-inline: clamp(1.5rem, 5vw, 6rem);
}

/* Flex layouts */
.flex-row {
  display: flex;
  gap: var(--space-md);
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* CSS Grid Columns */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

/* Asymmetric Editorial Grid */
.grid-asymmetric-2-1 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
}

.grid-asymmetric-1-2 {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(2rem, 5vw, 5rem);
}

/* Broken Grid Layout (Layered & Architectural) */
.broken-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
  align-items: center;
}

.bg-left {
  grid-column: 1 / 7;
}

.bg-right {
  grid-column: 7 / 13;
}

.bg-text-overlap {
  grid-column: 5 / 12;
  z-index: 2;
  background-color: var(--bg-color);
  padding: var(--space-lg);
  margin-inline-start: calc(var(--space-xl) * -1);
  box-shadow: 0 30px 60px rgba(0,0,0,0.03);
}

/* Responsive Overrides (will be detailed in responsive.css) */
@media (max-width: 1024px) {
  .grid-2, .grid-3, .grid-4, .grid-asymmetric-2-1, .grid-asymmetric-1-2, .broken-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .bg-left, .bg-right, .bg-text-overlap {
    grid-column: 1 / -1;
    margin-inline-start: 0;
    padding: 0;
    box-shadow: none;
  }
}

/* Sticky layout blocks for storytelling scroll */
.sticky-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  position: relative;
}

.sticky-panel {
  position: sticky;
  top: calc(var(--header-height-shrink) + var(--space-lg));
  height: calc(100vh - var(--header-height-shrink) - var(--space-xxl));
  overflow: hidden;
}

.scroll-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-xxl);
}

@media (max-width: 1024px) {
  .sticky-wrapper {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .sticky-panel {
    position: relative;
    top: 0;
    height: 400px;
  }
}