/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
  gap: var(--space-xl);
}
@media (max-width: 768px) {
  .site-header .container {
    padding-top: var(--space-sm);
    padding-bottom: var(--space-sm);
    gap: var(--space-md);
  }
}

.logo {
  display: inline-block;
  line-height: 0;
}
.logo img {
  display: block;
  height: 40px;
  width: auto;
  object-fit: contain;
}
.site-header .logo img {
  height: 56px;
}
.site-footer .logo img {
  height: 64px;
}

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

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: var(--text-sm);
}
.main-nav a:hover {
  color: var(--color-primary);
}

.main-nav .btn {
  margin-left: var(--space-md);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: none;
  border: none;
  padding: 10px;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.nav-toggle:hover {
  background: var(--color-bg-alt);
}
.nav-toggle:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}
body.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
body.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
body.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .site-header .logo img {
    height: 44px;
  }
  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3xl) var(--space-xl);
    padding-top: calc(var(--space-3xl) + 60px);
    box-shadow: -4px 0 24px rgba(0,0,0,0.12);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 99;
    overflow-y: auto;
  }
  .main-nav.is-open {
    transform: translateX(0);
  }
  body.nav-open .nav-backdrop {
    opacity: 1;
    pointer-events: auto;
  }
  .main-nav a {
    padding: var(--space-md) 0;
    min-height: 44px;
    align-items: center;
    display: flex;
    border-bottom: 1px solid var(--color-border);
  }
  .main-nav .btn {
    margin-left: 0;
    margin-top: var(--space-md);
    min-height: 40px;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    justify-content: center;
  }
}
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}
@media (max-width: 768px) {
  .nav-backdrop {
    display: block;
  }
}
@media (max-width: 480px) {
  .site-footer .logo img {
    height: 52px;
  }
  .footer-grid {
    gap: var(--space-2xl);
  }
  .footer-brand p {
    max-width: 100%;
  }
}

/* Footer */
.site-footer {
  background: var(--color-dark);
  color: #e8e6e1;
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  color: #fff;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-md);
}
.footer-brand p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  max-width: 280px;
}

.footer-nav h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-lg);
}
.footer-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav li {
  margin-bottom: var(--space-sm);
}
.footer-nav a {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
}
.footer-nav a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}
.footer-legal {
  display: flex;
  gap: var(--space-xl);
}
.footer-legal a {
  color: rgba(255,255,255,0.5);
  font-size: var(--text-sm);
}
.footer-legal a:hover {
  color: rgba(255,255,255,0.8);
}
.copyright {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}