body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background-color: #f9fafb;
  color: #111827;
  margin: 0;
  padding: 0;
}

header {
  background-color: #1f2937;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  color: #cbd5e1;
  text-decoration: none;
  display: inline-block;
  margin: 0.3rem 0.5rem;
  font-size: 0.9rem;
}

main {
  padding: 2rem;
}

footer {
  background-color: #e5e7eb;
  text-align: center;
  padding: 1rem;
  width: 100%;
  font-size: 0.85rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  background-color: white;
  margin-top: 1em;
}

th, td {
  border: 1px solid #d1d5db;
  text-align: left;
  padding: 6px 8px;
  font-size: 0.85rem;


}

th.sortable {
  cursor: pointer;
  user-select: none;
  background-color: #e5e7eb;
}

.controls {
  margin: 1em 0;
  text-align: center;
}

form label {
  display: block;
  margin: 0.5em 0 0.2em;
}

form input[type="text"],
form textarea {
  width: 100%;
  padding: 0.6em;
  border: 1px solid #ccc;
  border-radius: 4px;
}

form button {
  margin-top: 1em;
  padding: 0.6em 1em;
  background-color: #0074cc;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.messages {
  text-align: center;
}

.success {
  color: green;
}
.error {
  color: red;
}

.table-wrapper {
  overflow-x: auto;
}

/* Optional: improve usability on very narrow screens */
.table-wrapper table {
  min-width: 600px;
}

@media (max-width: 600px) {
  body {
    font-size: 0.9rem;
    padding: 0.5rem;
  }

  .table-wrapper {
    -webkit-overflow-scrolling: touch; /* iOS momentum scrolling */
  }

  nav {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  nav a {
    margin: 0.4rem 0;
    font-size: 1rem;
  }
  
}