/* ==========================================================================
   Layout primitives — container, section, grid, stack
   ========================================================================== */

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

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

.section {
  padding-block: clamp(3rem, 8vw, 6rem);
}

.section--tight {
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-bottom: var(--sp-10);
  max-width: 720px;
}

.section-header__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-green);
}

.section-header__eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--color-green);
}

.section-header__title {
  font-size: var(--fs-3xl);
  line-height: var(--lh-tight);
}

.section-header__subtitle {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  max-width: 640px;
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
  align-items: center;
}

/* Grid utilities */
.grid {
  display: grid;
  gap: var(--sp-6);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.grid--auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--auto-fill-sm {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

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

/* Stack — vertical rhythm */
.stack > * + * {
  margin-top: var(--sp-4);
}

.stack--lg > * + * {
  margin-top: var(--sp-8);
}

.stack--xl > * + * {
  margin-top: var(--sp-12);
}

/* Cluster — horizontal wrap */
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3);
}

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

/* Sidebar split (article layout) */
.split {
  display: grid;
  gap: var(--sp-12);
  grid-template-columns: minmax(0, 1fr) 320px;
}

@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; }
}

/* Page hero (generic) */
.page-hero {
  position: relative;
  padding-block: clamp(4rem, 10vw, 7rem) clamp(2.5rem, 6vw, 4rem);
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(800px 380px at 50% 0%, rgba(225, 14, 32, 0.18), transparent 70%),
    linear-gradient(180deg, var(--color-bg-elevated) 0%, transparent 100%);
}

.page-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: var(--sp-3);
}

.page-hero__title {
  font-size: var(--fs-4xl);
  line-height: var(--lh-tight);
  margin-bottom: var(--sp-4);
  max-width: 18ch;
}

.page-hero__subtitle {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  max-width: 60ch;
}