/* ==========================================================================
   Layout Framework — TwinComp Portfolio
   Mobile-first containers, architectural grids, and section spacing
   ========================================================================== */

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

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* Section Rhythm */
.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
  position: relative;
}

@media (min-width: 1024px) {
  .section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }
}

.section--bordered {
  border-top: 1px solid var(--border-color);
}

.section--surface {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

/* Section Header Architecture */
.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  max-width: 760px;
}

.section-header--split {
  max-width: 100%;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
}

@media (min-width: 900px) {
  .section-header--split {
    flex-direction: row;
    align-items: flex-end;
  }
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-500);
}

.section-eyebrow::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: var(--primary-500);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, var(--text-4xl));
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Hero Architectural Grid */
.hero-section {
  padding-top: calc(var(--space-16) + 3.5rem);
  padding-bottom: var(--space-16);
}

@media (min-width: 1024px) {
  .hero-section {
    padding-top: calc(var(--space-20) + 4rem);
    padding-bottom: var(--space-20);
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.35fr 0.85fr;
    gap: var(--space-12);
  }
}

/* Responsive Multi-Column Grids */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 720px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1180px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
  }
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.grid-asymmetric {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 960px) {
  .grid-asymmetric {
    grid-template-columns: 1fr 1.25fr;
    gap: var(--space-12);
    align-items: start;
  }
}

/* Portfolio Matrix Grid */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 720px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}