/* Layout Systems */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-section);
}

.section--soft {
  background-color: transparent;
}

.section--warm {
  background-color: transparent;
}

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

.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); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* Flex Utilities */
.flex {
  display: flex;
}

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

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Header & Footer Layout */
.site-header {
  position: sticky;
  top: 20px;
  z-index: 100;
  width: 95%;
  max-width: 1200px;
  margin: 0 auto 20px auto;
  border-radius: var(--radius-large);
  background-color: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  transition: all 0.3s var(--ease-out);
}

.site-header.is-scrolled {
  background-color: rgba(9, 9, 11, 0.85);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-color: rgba(255, 255, 255, 0.15);
}

.site-footer {
  background-color: var(--color-surface);
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-large);
  width: 95%;
  max-width: 1200px;
  margin: 60px auto 20px auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Utilities */
.text-center { text-align: center; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Background Canvas */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  object-fit: cover;
  opacity: 0.35;
  filter: blur(1px) contrast(1.1);
}