/* ============================================
   COMPONENTS — Header, Nav, Footer, Buttons
   ============================================ */

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-text);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Navigation */
.site-nav {
  display: none;
  gap: var(--space-md);
}

.site-nav a {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  transition: color 0.2s;
}

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

/* Mobile nav open */
.site-nav.open {
  display: flex;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  z-index: 99;
}

.site-nav.open a {
  font-size: var(--text-2xl);
}

/* Menu Toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.3s, opacity 0.3s;
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Footer */
.site-footer {
  padding: var(--space-lg) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-inner p {
  font-size: var(--text-sm);
  color: var(--color-text);
  opacity: 0.5;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  background: var(--color-accent);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  border: 2px solid var(--color-accent);
  cursor: pointer;
  transition: opacity 0.2s, background 0.2s, color 0.2s;
}

.btn:hover {
  opacity: 0.85;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-text);
}

.btn-outline:hover {
  background: var(--color-text);
  color: var(--color-bg);
  opacity: 1;
}

.btn-small {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-xs);
}

/* Desktop */
@media (min-width: 768px) {
  .site-nav {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }
}