/* ============================================================
   layouts.css — page regions, containers, grids
   Positioning + sizing only. No visual styling.
   ============================================================ */

/* === Page region elevation: stack above fixed body background === */
main, header, footer {
  position: relative;
  z-index: var(--z-content);
}

/* === Container shells === */
.container {
  position: relative;

  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container-narrow {
  position: relative;

  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* === Section vertical rhythm === */
section {
  position: relative;

  padding: clamp(4rem, 8vw, 7rem) 0;
}

/* === Header nav layout === */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--gutter);
}

/* === Tabs heading row === */
.tabs-headings {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 0.6rem;
}

/* === Gallery grid === */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 720px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* === Gallery stage spacing === */
.gallery-stage {
  position: relative;

  padding: clamp(3rem, 6vw, 5rem) 0;
}

/* === Experience two-column layout === */
.experience-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}
@media (min-width: 880px) {
  .experience-layout {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-16);
  }
}

.experience-skills {
  display: none;
}
@media (min-width: 880px) {
  .experience-skills {
    display: flex;
    flex-direction: column;
    align-self: stretch;
    justify-content: center;
  }
}

/* === Skill grid === */
.skill-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);

  list-style: none;
}

/* === Credentials two-column layout === */
.creds-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}
@media (min-width: 880px) {
  .creds-layout {
    grid-template-columns: 1.7fr 1fr;
    gap: var(--space-16);
  }
}

.creds-certs {
  display: flex;
  flex-direction: column;
}

.cert-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-column: 1 / -1;
  gap: var(--space-6) var(--space-5);

  list-style: none;
}
@media (min-width: 880px) {
  .cert-list {
    display: flex;
    flex-direction: column;
    flex: 1;
    justify-content: space-between;
    grid-column: auto;
    gap: 1.75rem;
    min-height: 100%;
  }
}

/* === Presence grid === */
.presence-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: 1100px;
  margin: 0 auto;
}
@media (min-width: 720px) {
  .presence-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .presence-card.presence-linkedin,
  .presence-card.presence-github,
  .presence-card.presence-kaggle {
    grid-column: span 2;
  }
  .presence-card.presence-personal {
    grid-column: span 3;
  }
}

/* === Footer layout === */
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--container-max);
  margin: 0 auto;
}
@media (min-width: 600px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
  }
}