/* ===================================================================
   Ocean Sun Theme — Layout
   Grid system, containers, sections
   =================================================================== */

/* ── Container ── */

.os-container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--os-space-4);
  padding-right: var(--os-space-4);
}

.os-container--narrow {
  max-width: 960px;
}

.os-container--wide {
  max-width: 1440px;
}

@media (min-width: 768px) {
  .os-container {
    padding-left: var(--os-space-8);
    padding-right: var(--os-space-8);
  }
}

/* ── Terminal page (full-width work tool) ── */

.os-terminal-page {
  width: 100%;
  max-width: none;
  padding: 8px 2%;
}

/* ── Section ── */

.os-section {
  padding-top: var(--os-space-16);
  padding-bottom: var(--os-space-16);
}

.os-section--cream {
  position: relative;
  background-color: var(--os-bg-cream);
}

/* Subtle grain texture on cream sections */
.os-section--cream::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.os-section--cream > * {
  position: relative;
  z-index: 1;
}

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

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

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

.os-section--dark p {
  color: rgba(255, 255, 255, 0.8);
}

/* Subtle divider between same-bg sections */
.os-section + .os-section {
  border-top: 1px solid var(--os-border);
}

.os-section--cream + .os-section,
.os-section + .os-section--cream,
.os-section--dark + .os-section,
.os-section + .os-section--dark,
.os-section--warm + .os-section,
.os-section + .os-section--warm {
  border-top: none;
}

@media (max-width: 768px) {
  .os-section {
    padding-top: var(--os-space-10);
    padding-bottom: var(--os-space-10);
  }
}

/* ── Grid ── */

.os-grid {
  display: grid;
  gap: var(--os-space-6);
}

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

@media (max-width: 1024px) {
  .os-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .os-grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .os-grid--2,
  .os-grid--3,
  .os-grid--4 {
    grid-template-columns: 1fr;
  }
}

/* ── Flex helpers ── */

.os-flex {
  display: flex;
  gap: var(--os-space-4);
}

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

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

.os-flex--wrap {
  flex-wrap: wrap;
}

/* ── Section Header ── */

.os-section-header {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--os-space-10);
}

.os-section-label {
  display: inline-block;
  font-family: var(--os-font-body);
  font-size: var(--os-text-xs);
  font-weight: var(--os-font-body-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--os-cta);
  background: rgba(184, 133, 108, 0.08);
  padding: 6px 16px;
  border-radius: var(--os-radius-full);
  margin-bottom: var(--os-space-4);
}

.os-section--dark .os-section-label {
  color: var(--os-secondary);
  background: rgba(201, 169, 110, 0.15);
}

.os-section-header h2 {
  margin-bottom: var(--os-space-4);
}

.os-section-header p {
  color: var(--os-text-muted);
  font-size: var(--os-text-lg);
}