/* ==========================================================================
   LAYOUT.CSS — Page Structure, Grid, Utilities
   Mobile-first: base = mobile, @media for tablet (768px) & desktop (1024px)
   ========================================================================== */

/* ==========================================================================
   Container
   ========================================================================== */

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

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

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
  padding-block: var(--space-2xl);
}

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

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-3xl);
  }
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-4xl);
  }
}

/* ==========================================================================
   CSS Grid Utilities
   Single column on mobile, multi-column on tablet/desktop
   ========================================================================== */

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

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

/* ==========================================================================
   Flexbox Utilities
   ========================================================================== */

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap    { flex-wrap: wrap; }

/* ==========================================================================
   Spacing Utilities
   mt = margin-top, mb = margin-bottom, py = padding-block, px = padding-inline
   ========================================================================== */

.mt-xs  { margin-top: var(--space-xs); }
.mt-sm  { margin-top: var(--space-sm); }
.mt-md  { margin-top: var(--space-md); }
.mt-lg  { margin-top: var(--space-lg); }
.mt-xl  { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-xs  { margin-bottom: var(--space-xs); }
.mb-sm  { margin-bottom: var(--space-sm); }
.mb-md  { margin-bottom: var(--space-md); }
.mb-lg  { margin-bottom: var(--space-lg); }
.mb-xl  { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.py-sm  { padding-block: var(--space-sm); }
.py-md  { padding-block: var(--space-md); }
.py-lg  { padding-block: var(--space-lg); }
.py-xl  { padding-block: var(--space-xl); }
.py-2xl { padding-block: var(--space-2xl); }

.px-sm  { padding-inline: var(--space-sm); }
.px-md  { padding-inline: var(--space-md); }
.px-lg  { padding-inline: var(--space-lg); }
.px-xl  { padding-inline: var(--space-xl); }

/* ==========================================================================
   Screen Reader Only
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Header
   Sticky, white background. Shadow class (.header--scrolled) added via JS.
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-white);
  transition: box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-header);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
  height: var(--header-height);
}

@media (min-width: 768px) {
  .header-inner {
    padding-inline: var(--space-xl);
  }
}

/* Logo link — flex shrink 0 so it never compresses */
.logo-link {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

/* Mobile: show SVG icon square, desktop: show full wide logo */
.logo-img {
  display: block;
  height: 44px;
  width: auto;
}

@media (min-width: 1024px) {
  .logo-img {
    height: 52px;
    max-width: 280px;
  }
}

/* Nav pushed to center via flex auto margin */
.nav {
  flex: 1;
  justify-content: center;
}

/* Right-side cluster: CTA + lang + hamburger */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  margin-left: auto;
}

/* ==========================================================================
   Navigation
   Desktop: horizontal. Mobile: hidden, toggled via JS (.nav--open).
   ========================================================================== */

.nav {
  display: none;
}

.nav--open {
  display: flex;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  list-style: none;
}

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

  .nav-list {
    flex-direction: row;
    gap: var(--space-md);
    flex-wrap: nowrap;
  }

  .nav-link {
    font-size: 0.875rem;
    white-space: nowrap;
    font-weight: 500;
  }

  /* Hide CTA button label on smaller desktops to save space */
  .nav-cta {
    font-size: 0.8125rem;
    padding: 0.5rem 1rem;
    white-space: nowrap;
  }

  /* Hide lang switch on narrow desktop, show on wider */
  .lang-switch {
    display: none;
  }
}

@media (min-width: 1280px) {
  .nav-list {
    gap: var(--space-lg);
  }

  .nav-link {
    font-size: 0.9375rem;
  }

  .lang-switch {
    display: flex;
    align-items: center;
    gap: 0.25rem;
  }
}

/* ==========================================================================
   Mobile Menu (full-screen overlay)
   ========================================================================== */

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: var(--color-bg-white);
  padding: var(--header-height) var(--space-md) var(--space-xl);
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-lg);
  overflow-y: auto;
}

.mobile-menu--open {
  display: flex;
}

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

/* ==========================================================================
   Footer
   Grid: stacked on mobile, 3-4 columns on desktop
   ========================================================================== */

.footer {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  padding-block: var(--space-2xl);
}

/* footer-inner = legacy alias, footer-grid = actual grid */
.footer-inner,
.footer-grid {
  display: grid;
  gap: var(--space-xl);
}

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

@media (min-width: 1024px) {
  .footer-inner,
  .footer-grid {
    grid-template-columns: 2fr 1fr 1.2fr 1.3fr;
    gap: var(--space-xl);
  }
}

/* Column base */
.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Logo */
.footer-logo {
  display: block;
  height: 42px;
  width: auto;
  max-width: 200px;
  align-self: flex-start;  /* prevent stretching in flex column */
  margin-bottom: var(--space-xs);
  filter: brightness(0) invert(1);
  opacity: 0.92;
}

/* Description text under logo */
.footer-desc {
  font-size: 0.875rem;
  line-height: 1.6;
  opacity: 0.75;
  max-width: 28ch;
}

/* Column heading */
.footer-heading {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-bottom: var(--space-xs);
}

/* Nav / contact list */
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  font-size: 0.9rem;
}

.footer-links li {
  opacity: 0.85;
  line-height: 1.4;
}

/* CTA column */
.footer-col .btn-cta {
  margin-top: var(--space-xs);
  align-self: flex-start;
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
}

.footer-col > p {
  font-size: 0.875rem;
  opacity: 0.8;
  line-height: 1.5;
}

/* Links */
.footer a {
  color: var(--color-text-inverse);
  text-decoration: none;
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}

.footer a:hover {
  opacity: 1;
  text-decoration: underline;
}

/* Bottom bar */
.footer-bottom {
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.8125rem;
  opacity: 0.6;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  text-align: center;
}

.footer-bottom a {
  opacity: 1;
  text-decoration: underline;
}

.footer-bottom a:hover {
  opacity: 0.8;
}

/* ==========================================================================
   Hero Section
   Full-width, centered text, responsive min-height
   ========================================================================== */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 60vh;
  padding-block: var(--space-2xl);
  padding-inline: var(--space-md);
}

@media (min-width: 768px) {
  .hero {
    min-height: 70vh;
    padding-block: var(--space-3xl);
    padding-inline: var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .hero {
    min-height: 80vh;
    padding-block: var(--space-4xl);
  }
}

.hero > * {
  max-width: 800px;
}