:root {
  --logo-font-size: 18px;
  --logo-font-weight: 800;
  --nav-font-size: 16px;
  --nav-font-weight: 700;

  --bg: #f6f8fb;
  --topbar: #C6DEFD;
  --card-radius: 20px;
  --card-padding: 24px;
  --muted: #666;
  --shadow: 0 6px 18px rgba(15,30,50,0.06);
  --inner-shadow: 0 2px 6px rgba(10,20,30,0.06);
}

@media (min-width: 900px) and (max-width: 1199px) {
  :root {
    --logo-font-size: 18px;
    --nav-font-size: 16px;
    --card-padding: 22px;
  }
}

@media (min-width: 600px) and (max-width: 899px) {
  :root {
    --logo-font-size: 18px;
    --nav-font-size: 16px;
    --card-padding: 20px;
  }
}

@media (max-width: 599px) {
  :root {
    --logo-font-size: 16px;
    --nav-font-size: 14px;
    --card-padding: 18px;
  }
}