header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid #1f2937;
  background: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(6px);
}

header h1 {
  margin: 0;
  font-size: 18px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#settingsBtn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid #334155;
  color: var(--text);
  border-radius: 12px;
  padding: 8px 12px;
  cursor: pointer;
  flex-shrink: 0;
}

#settingsBtn .gear {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, #94a3b8, #e5e7eb);
}

@media (max-width: 640px) {
  header {
    padding: 10px 12px;
    gap: 8px;
  }

  header h1 {
    font-size: 14px;
  }

  #settingsBtn {
    padding: 6px 10px;
    font-size: 13px;
  }

  #settingsBtn span:first-child {
    display: none;
  }

  #settingsBtn .gear {
    width: 20px;
    height: 20px;
  }
}