header {
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: var(--shadow-sm);
  animation: slideDown 0.8s ease-out;
}

.site-header-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  max-width: var(--container-max);
  margin: 0 auto;
}

.site-title {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1;
  animation: fadeInUp 1s ease-out;
  animation-delay: 0.2s;
  opacity: 0;
  animation-fill-mode: forwards;
}

.site-title-link {
  text-decoration: none;
  color: inherit;
}

.site-title-text {
  font-size: clamp(1rem, 4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: clamp(0.05em, 2vw, 0.15em);
  text-transform: uppercase;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.site-subtitle {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(0.75rem, 2vw, 1.5rem);
  font-weight: 700;
  letter-spacing: clamp(0.1em, 1.5vw, 0.25em);
  text-transform: uppercase;
  color: #3a3a3a;
  line-height: 1.3;
  padding-left: var(--space-md);
  border-left: 2px solid rgba(0, 0, 0, 0.15);
  animation: fadeInUp 1s ease-out;
  animation-delay: 0.4s;
  opacity: 0;
  animation-fill-mode: forwards;
}

@media (max-width: 240px) {
  .site-header-container {
    gap: var(--space-xs);
  }
  
  .site-title-text {
    font-size: 0.875rem;
    letter-spacing: 0.05em;
  }
  
  .site-subtitle {
    font-size: 0.625rem;
    letter-spacing: 0.05em;
    padding-left: var(--space-xs);
  }
}

@media (max-width: 425px) {
  .site-header-container {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .site-subtitle {
    border-left: none;
    border-top: 2px solid rgba(0, 0, 0, 0.15);
    padding-left: 0;
    padding-top: var(--space-sm);
    text-align: center;
  }
}

@media (min-width: 768px) {
  header {
    padding: var(--space-lg) var(--space-md);
  }
  
  .site-header-container {
    gap: clamp(1rem, 2vw, 2rem);
  }
}