/* ==========================================================================
   Layout — Grid, containers, responsive structure
   ========================================================================== */

.layout-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Site header */
.site-header {
  padding: var(--space-lg) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo img {
  height: 2.5rem;
  width: auto;
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-nav__list {
  display: flex;
  gap: var(--space-lg);
}

.site-nav__link {
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  position: relative;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

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

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-text);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Main content */
main {
  padding: var(--space-xl) 0;
  min-height: 60vh;
}

/* Footer */
.site-footer {
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.85rem;
}

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

.site-footer__social {
  display: flex;
  gap: var(--space-md);
}

.site-footer__social a {
  color: var(--color-muted);
}
.site-footer__social a:hover {
  color: var(--color-text);
}

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

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

/* Responsive */
@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .site-nav__list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__list.is-open {
    display: flex;
  }

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

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }
}

@media (max-width: 600px) {
  .layout-container {
    padding: 0 var(--space-md);
  }

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

  .site-footer__inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}