/* ═══════════════════════════════════════════════════════════════
   LAYOUT.CSS — Container, header, footer, grid primitives
═══════════════════════════════════════════════════════════════ */

/* ── Container ─────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 640px) {
  .container { padding-left: 1.5rem; padding-right: 1.5rem; }
}

@media (min-width: 1024px) {
  .container { padding-left: 2rem; padding-right: 2rem; }
}

/* ── Section spacing ───────────────────────────────────────────── */
.section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.section-sm {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .section    { padding-top: 7rem; padding-bottom: 7rem; }
  .section-sm { padding-top: 5rem; padding-bottom: 5rem; }
}

@media (min-width: 1024px) {
  .section { padding-top: 8rem; padding-bottom: 8rem; }
}

/* ── Header / Navbar ───────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background-color var(--t-base), border-color var(--t-base), backdrop-filter var(--t-base);
}

.site-header.scrolled {
  background-color: rgba(9, 16, 28, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

@media (min-width: 1024px) {
  .nav-inner { height: 80px; }
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: color var(--t-fast);
}

.nav-logo:hover { color: #fff; }

.nav-logo-dot {
  color: var(--primary);
  font-size: 1.35rem;
  line-height: 1;
  font-weight: 700;
}

/* Desktop nav list */
.nav-list {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 1024px) {
  .nav-list { display: flex; }
}

.nav-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--t-fast), background-color var(--t-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background-color: var(--border);
}

/* Dropdown */
.nav-dropdown-wrapper {
  position: relative;
}

.nav-dropdown-btn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--t-fast), background-color var(--t-fast);
}

.nav-dropdown-btn:hover,
.nav-dropdown-btn.active {
  color: var(--text-primary);
  background-color: var(--border);
}

.nav-dropdown-btn svg {
  width: 0.875rem;
  height: 0.875rem;
  transition: transform var(--t-base);
}

.nav-dropdown-btn.open svg {
  transform: rotate(180deg);
}

.nav-dropdown-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  width: 13rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-4px);
  transition: opacity var(--t-base), visibility var(--t-base), transform var(--t-base);
}

.nav-dropdown-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--t-fast), background-color var(--t-fast);
}

.nav-dropdown-item:hover {
  color: var(--text-primary);
  background-color: var(--bg-card-hover);
}

.nav-dropdown-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary);
  opacity: 0.6;
  flex-shrink: 0;
}

/* Desktop CTA */
.nav-cta {
  display: none;
  flex-shrink: 0;
}

@media (min-width: 1024px) {
  .nav-cta { display: block; }
}

/* Hamburger */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  margin-right: -0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .nav-hamburger { display: none; }
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transform-origin: center;
  transition: transform var(--t-base), opacity var(--t-base);
}

.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.nav-mobile {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow), opacity var(--t-slow);
  opacity: 0;
}

@media (min-width: 1024px) {
  .nav-mobile { display: none; }
}

.nav-mobile.open {
  max-height: 600px;
  opacity: 1;
}

.nav-mobile-inner {
  border-top: 1px solid var(--border);
  padding: 1rem 0 1.5rem;
}

.nav-mobile-link {
  display: block;
  padding: 0.625rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--t-fast);
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
  color: var(--text-primary);
}

.nav-mobile-industries-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.625rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--t-fast);
}

.nav-mobile-industries-btn:hover { color: var(--text-primary); }

.nav-mobile-industries-btn svg {
  width: 0.875rem;
  height: 0.875rem;
  transition: transform var(--t-base);
}

.nav-mobile-industries-btn.open svg { transform: rotate(180deg); }

.nav-mobile-subnav {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-base), opacity var(--t-base);
  opacity: 0;
  margin-left: 0.75rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.nav-mobile-subnav.open {
  max-height: 400px;
  opacity: 1;
}

.nav-mobile-sublink {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--t-fast);
}

.nav-mobile-sublink:hover { color: var(--text-secondary); }

.nav-mobile-cta {
  padding-top: 0.75rem;
}

/* ── Footer ────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  background-color: var(--bg-surface);
}

.footer-grid {
  display: grid;
  gap: 2.5rem;
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 230px;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a,
.footer-social-link {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--t-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.footer-social a:hover,
.footer-social-link:hover { color: var(--text-secondary); }

.footer-bottom-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: monospace;
}

.footer-bottom-social {
  display: flex;
  gap: 1.25rem;
}

.footer-bottom-social a {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--t-fast);
}

.footer-bottom-social a:hover { color: var(--text-secondary); }

.footer-col-label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-link-list a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--t-fast);
}

.footer-link-list a:hover { color: var(--text-primary); }

.footer-bottom {
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid transparent;
  background: linear-gradient(90deg, transparent 0%, var(--border-strong) 50%, transparent 100%);
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: top;
  padding-top: 1.25rem;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-bottom p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Grid helpers ──────────────────────────────────────────────── */
.grid-2 {
  display: grid;
  gap: 1.5rem;
}

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

.grid-3 {
  display: grid;
  gap: 1.5rem;
}

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

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

.grid-4 {
  display: grid;
  gap: 1.5rem;
}

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

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

/* ── Page offset (below fixed nav) ────────────────────────────── */
.page-top {
  padding-top: 80px;
}

@media (min-width: 1024px) {
  .page-top { padding-top: 96px; }
}