.site-header {
  background: var(--color-surface-base);
  border-bottom: 2px solid var(--color-border-strong);
  box-shadow: 0 0 32px rgba(107, 72, 255, 0.18);
  padding: var(--space-7) 48px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-border-strong);
  color: var(--color-text-secondary);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.logo-text {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-secondary);
}

.header-tag {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: var(--space-3) var(--space-7);
  border-radius: var(--radius-xl);
  background: rgba(28, 227, 207, 0.15);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-text-inverse);
}

.header-logout {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: color var(--duration-fast), border-color var(--duration-fast);
  margin-left: var(--space-6);
}
.header-logout:hover {
  color: rgba(255, 255, 255, 0.85);
  border-color: rgba(255, 255, 255, 0.35);
}