/* ─── SHARED HEADER STYLES ───────────────────────────────────────────────────────── */
#appHeader {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  z-index: 1000;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

#headerRow1 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  height: 64px;
}

#headerRow2 {
  display: flex;
  justify-content: flex-start;
  padding: 12px 20px 16px;
  border-top: 1px solid #f1f5f9;
  background: #fafbfc;
}

/* Left side - Title and Navigation */
#headerLeft {
  display: flex;
  align-items: center;
  gap: 30px;
}

#siteTitle {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 700;
  color: #1a365d;
  margin: 0;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#navButtons {
  display: flex;
  gap: 12px;
}

.navBtn {
  padding: 10px 18px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  background: #fff;
  color: #475569;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: 'Inter', sans-serif;
}

.navBtn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: #334155;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navBtn:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* Responsive header */
@media (max-width: 1024px) {
  #headerRow1 {
    flex-direction: column;
    height: auto;
    gap: 12px;
    padding: 15px 20px;
  }
  
  #headerLeft {
    width: 100%;
    justify-content: space-between;
  }
  
  #navButtons {
    gap: 8px;
  }
  
  .navBtn {
    padding: 8px 14px;
    font-size: 13px;
  }
}

@media (max-width: 640px) {
  #headerRow1 {
    padding: 12px 16px;
    gap: 8px;
    flex-wrap: wrap;
    row-gap: 8px;
  }
  
  #headerLeft {
    gap: 16px;
  }
  
  #navButtons {
    gap: 6px;
  }
  
  .navBtn {
    padding: 6px 10px;
    font-size: 12px;
  }
  
  #siteTitle {
    font-size: 22px;
  }
}