/* Macro structure: header/nav, container, section rhythm, grids.
   Mobile-first: base rules target 375px; min-width queries progressively enhance. */

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-5);
  }
}

.section {
  position: relative;
  padding-block: var(--space-section);
}

.section--alt {
  background: var(--bg-secondary);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-6);
}

.section-eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-2);
}

.section-lead {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  line-height: var(--lh-normal);
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(20, 24, 28, 0.85);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: transform var(--duration-fast) var(--ease-standard),
    opacity var(--duration-fast) var(--ease-standard);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

.site-header[data-nav-open="true"] .nav-toggle-icon {
  background: transparent;
}

.site-header[data-nav-open="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header[data-nav-open="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.main-nav {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--bg-primary);
  padding: var(--space-4) var(--space-3);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard);
}

.site-header[data-nav-open="true"] .main-nav {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.main-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--fs-xl);
}

/* The full inline nav (7 links + CTA) only fits comfortably at desktop
   widths — at 768px it overflows the header, so the hamburger persists
   through tablet and the row layout only kicks in at 1024px. */
@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .main-nav {
    position: static;
    inset: auto;
    background: none;
    padding: 0;
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .main-nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--fs-sm);
  }
}

/* ---------- Grids ---------- */

.grid-pillars,
.grid-projects,
.grid-team {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-pillars,
  .grid-team {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

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

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

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

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

.stats-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

@media (min-width: 640px) {
  .stats-row {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-6);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}