/* ============================================
   Layout — Container, Grid, Nav, Footer
   ============================================ */

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* ---- Section spacing ---- */
.section {
  padding: var(--space-24) 0;
}

.section--sm {
  padding: var(--space-16) 0;
}

.section--lg {
  padding: var(--space-30) 0;
}

/* ---- Grid ---- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.grid--editorial {
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

.grid--editorial-wide {
  grid-template-columns: 3fr 2fr;
  gap: var(--space-8);
  align-items: center;
}

.grid--editorial-wide-reverse {
  grid-template-columns: 2fr 3fr;
  gap: var(--space-8);
  align-items: center;
}

/* ---- Two-column app layout ---- */
.app-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-8);
  align-items: start;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  z-index: var(--z-sticky);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav--transparent {
  background: transparent;
}

.nav--solid {
  background: var(--color-surface-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-white);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav--solid .nav__brand {
  color: var(--color-white);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--color-white);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover::after {
  width: 100%;
}

.nav--solid .nav__link {
  color: rgba(255, 255, 255, 0.65);
}

.nav--solid .nav__link:hover {
  color: var(--color-white);
}

.nav__cta {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-accent);
  padding: var(--space-2) var(--space-6);
  border-radius: 0;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav__cta:hover {
  background: var(--color-accent-hover);
}

.nav--solid .nav__cta {
  color: var(--color-white);
}

/* Nav system (language + auth) */
.nav__system {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Language selector */
.nav__lang-btn {
  display: inline-flex;
  align-items: center;
  background: none;
  border: 1px solid rgba(255,255,255,0.35);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: 2px;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.nav__lang-btn:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}

.nav--solid .nav__lang-btn {
  border-color: rgba(0,0,0,0.2);
  color: var(--color-text);
}

.nav--solid .nav__lang-btn:hover {
  background: rgba(0,0,0,0.06);
}

.nav__lang-menu {
  min-width: 90px !important;
  border-radius: 2px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.nav__lang-option:hover {
  background: var(--color-surface-alt) !important;
}

/* Mobile nav */
.nav__hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: calc(var(--z-overlay) + 1);
}

.nav__hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  position: relative;
  transition: all var(--transition-fast);
}

.nav--solid .nav__hamburger-line {
  background: var(--color-white);
}

.nav__hamburger-line::before,
.nav__hamburger-line::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: inherit;
  left: 0;
  transition: all var(--transition-fast);
}

.nav__hamburger-line::before { top: -7px; }
.nav__hamburger-line::after { top: 7px; }

/* Hamburger open state */
.nav__hamburger.is-open .nav__hamburger-line {
  background: transparent;
}

.nav__hamburger.is-open .nav__hamburger-line::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--color-white);
}

.nav__hamburger.is-open .nav__hamburger-line::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--color-white);
}

/* Mobile overlay */
.nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-primary);
  z-index: var(--z-overlay);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.nav__overlay.is-open {
  display: flex;
  opacity: 1;
}

.nav__overlay-link {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  color: var(--color-white);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__overlay-link:hover {
  color: var(--color-accent);
}

/* ---- Footer ---- */
.footer {
  background: var(--color-surface-dark);
  padding: var(--space-24) 0 var(--space-8);
}

.footer__wordmark {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  line-height: var(--leading-tight);
  color: var(--color-white);
  margin-bottom: var(--space-16);
  letter-spacing: var(--tracking-tight);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-6);
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-4);
}

.footer__link {
  display: block;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.35);
}

.footer__bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer__bottom-links a {
  color: rgba(255, 255, 255, 0.35);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
  color: var(--color-white);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .app-layout { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .stepper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-4); }
  .section { padding: var(--space-12) 0; }
  .section--lg { padding: var(--space-16) 0; }

  .nav__links { display: none; }
  .nav__system { display: none; }
  .nav__hamburger { display: flex; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .grid--editorial,
  .grid--editorial-wide,
  .grid--editorial-wide-reverse {
    grid-template-columns: 1fr;
  }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
  .footer__wordmark { font-size: clamp(2rem, 12vw, 4rem); }

  /* Stepper compact on mobile */
  .stepper { overflow-x: auto; padding-bottom: var(--space-2); }
  .stepper__step { min-width: max-content; }
}

@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
}