/* ============================================
   LAYOUT — containers, header, footer, sections
   ============================================ */

.container {
  width: min(calc(100% - 32px), var(--container-width));
  margin-inline: auto;
}

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

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

.section--light {
  background-color: var(--color-white);
}

.section--off-white {
  background-color: var(--color-off-white);
}

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

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: linear-gradient(to bottom, rgba(9, 11, 13, 0.85), rgba(9, 11, 13, 0));
  transition: background-color var(--transition-base), height var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  background: var(--color-black);
  box-shadow: var(--shadow-md);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name strong {
  color: var(--color-text-light);
  font-size: 1rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.03em;
}

.brand-name span {
  color: var(--color-gold);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  font-weight: var(--fw-medium);
}

.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav a {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text-light);
  position: relative;
  padding-block: 4px;
  transition: color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--color-gold);
}

.main-nav a.is-active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--color-gold);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.lang-switch {
  display: none;
  align-items: center;
  gap: 4px;
  font-size: var(--fs-small);
  color: var(--color-text-light);
  font-weight: var(--fw-medium);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  z-index: calc(var(--z-mobile-menu) + 1);
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .main-nav {
    display: block;
  }
  .lang-switch {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
}

/* ---------- Mobile nav panel ---------- */

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  background: var(--color-black);
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-height) + var(--space-md)) var(--space-md) var(--space-md);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.mobile-nav.is-open {
  transform: translateX(0);
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.mobile-nav a {
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  color: var(--color-text-light);
}

.mobile-nav a.is-active {
  color: var(--color-gold);
}

.mobile-nav-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
}

.mobile-nav-contact {
  display: flex;
  gap: var(--space-md);
  color: var(--color-text-light);
  font-size: var(--fs-small);
}

body.nav-open {
  overflow: hidden;
}

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

.site-footer {
  background: var(--color-black);
  color: var(--color-text-muted-light);
  padding-block: var(--space-xl) var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.footer-brand p {
  color: var(--color-text-muted-light);
  font-size: var(--fs-small);
  margin-top: var(--space-sm);
  max-width: 320px;
}

.footer-col h4 {
  color: var(--color-text-light);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-col a {
  font-size: var(--fs-small);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-gold);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--fs-xs);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

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