/**
 * layout.css — page structure, sections, containment
 */
/* Custom scrollbar — monochrome, minimal, matches design tokens */
html {
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  scrollbar-width: thin;
}
html::-webkit-scrollbar {
  width: 10px;
}
html::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
html::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
  border: 2px solid var(--scrollbar-track);
}
html::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* Phase 6b + 7: background from tokens so light theme applies */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background: var(--body-bg);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* Global: prevent images from exceeding container width */
img {
  max-width: 100%;
}

.main {
  min-height: 100vh;
  padding-top: var(--space-12);
}

/* Section spacing — full display width with edge padding */
.section {
  padding: var(--space-12) clamp(var(--space-6), 5vw, var(--space-12));
  width: 100%;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.section--marquees {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  zoom: 0.75;
}

.section--marquees:first-of-type {
  padding-top: calc(var(--space-8) + 60px);
}

/* Phase 6c: section stacking for atmosphere overlays */
#exhibitions,
#about {
  position: relative;
}

#exhibitions .section-heading,
#exhibitions .exhibitions-section-content,
#about .section-heading,
#about .about-section-content {
  position: relative;
  z-index: 1;
}

/* Phase 6c: section atmosphere — subtle radial glows (no animation) */
#exhibitions::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: none;
}

#about::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(
    ellipse 90% 70% at 40% 60%,
    rgba(255, 255, 255, 0.02) 0%,
    transparent 60%
  );
}

/* Phase 7: section titles = big, light, uppercase (structural) */
.section-heading {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 400;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-8);
  line-height: var(--line-height-tight);
}

/* Hero fills viewport — full width */
.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-8) clamp(var(--space-6), 5vw, var(--space-12));
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

/* Scroll indicator container */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  transition: opacity var(--transition-base);
}

.hero__scroll.is-hidden {
  opacity: 0;
  pointer-events: none;
}