/* Layout - Navigation, Header, Footer, Grid Systems */

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-bg-secondary);
  border-bottom: var(--border-width-thick) solid var(--color-accent);
  z-index: var(--z-nav);
  backdrop-filter: blur(10px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  position: relative;
}

.nav__brand {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
}

.nav__brand a {
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav__brand a:hover {
  color: var(--color-accent);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 30px;
  height: 24px;
  padding: 0;
  z-index: var(--z-elevated);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav__menu {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav__link {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
  padding: var(--spacing-xs) 0;
}

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

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Mobile Navigation */
@media (max-width: 767px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg) var(--spacing-md);
    gap: var(--spacing-md);
    border-bottom: var(--border-width) solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav__menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    width: 100%;
    padding: var(--spacing-sm) 0;
  }
}

/* Main content offset for fixed header */
main {
  margin-top: 70px;
}

/* Footer */
.footer {
  background-color: var(--color-bg-secondary);
  border-top: var(--border-width) solid var(--color-border);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-4xl);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.footer__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.footer__compliance {
  font-size: var(--font-size-xs);
  color: var(--color-text-dim);
  margin: 0;
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__links a {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-accent);
}

@media (max-width: 767px) {
  .footer__content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .footer__links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* Grid Systems */

/* Two-column asymmetric grid (60/40) */
.grid-asymmetric {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

@media (max-width: 767px) {
  .grid-asymmetric {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Two-column equal grid */
.grid-two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

@media (max-width: 767px) {
  .grid-two-col {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Three-column grid */
.grid-three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 1023px) {
  .grid-three-col {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-three-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Section Title */
.section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-2xl);
  text-align: left;
  position: relative;
  padding-left: var(--spacing-md);
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background-color: var(--color-accent);
}

@media (max-width: 767px) {
  .section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
  }
}