/* ==========================================================================
   LAYOUT AND GRIDS SYSTEM
   ========================================================================== */

/* Main Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

/* Premium Layout Sections - Emphasizing generous breathing room */
.section {
  padding-top: clamp(4rem, 6vw, 8rem);
  padding-bottom: clamp(4rem, 6vw, 8rem);
  position: relative;
}

.section-half {
  padding-top: clamp(2rem, 3vw, 4rem);
  padding-bottom: clamp(2rem, 3vw, 4rem);
}

.section-shaded {
  background-color: var(--bg-shaded);
}

.section-dark {
  background-color: var(--primary-dark);
  color: var(--text-on-dark);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--text-on-dark);
}

/* Grid Layouts - Flex/CSS Grid */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
  }
}

/* Alignment Helpers */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-column {
  display: flex;
  flex-direction: column;
}

.gap-1 {
  gap: var(--space-1);
}
.gap-2 {
  gap: var(--space-2);
}
.gap-3 {
  gap: var(--space-3);
}
.gap-4 {
  gap: var(--space-4);
}
.gap-5 {
  gap: var(--space-5);
}
.gap-6 {
  gap: var(--space-6);
}

/* Fixed Header Wrapper (Prevents scroll bugs on ancestor overflow-x rules) */
.header-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition:
    background 250ms ease-out,
    background-color 250ms ease-out,
    backdrop-filter 250ms ease-out,
    border-color 250ms ease-out,
    box-shadow 250ms ease-out;
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
  background: linear-gradient(
    180deg,
    rgba(239, 246, 255, 0.95) 0%,
    rgba(248, 251, 255, 0.92) 100%
  );
  box-shadow: 0 2px 18px rgba(0, 0, 0, 0.03);
}

/* Scroll Active state (applied via JS on scroll offset) */
.header-wrapper.is-scrolled {
  background: var(--glass-bg);
  background-color: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

/* Mobile: Remove backdrop-filter for better scroll performance */
@media (max-width: 1023px) {
  .header-wrapper {
    background: linear-gradient(180deg, #eff6ff 0%, #f8fbff 100%) !important;
  }
  .header-wrapper.is-scrolled {
    background: #ffffff !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

/* Main Content Spacing to clear fixed header */
#main-content {
  margin-top: 72px;
}