body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f5f6fa;
  margin: 0;
  padding: 0;
  color: #2c3e50;
}

h2, h3 {
  color: #34495e;
}

.container,
.login-container,
.register-container,
.dashboard-container,
.admin-container,
.organic-container,
.ads-platforms-container,
.new-campaign-container,
.product-sources-container,
.competitor-container {
  max-width: 500px;
  margin: 30px auto;
  background: #fff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 12px rgba(0,0,0,0.1);
}

form label {
  display: block;
  margin-top: 15px;
}

form input,
form select {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  margin-top: 20px;
  padding: 10px;
  width: 100%;
  border: none;
  background-color: #2980b9;
  color: white;
  font-weight: bold;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #1f6391;
}

.result-container {
  background: #ecf0f1;
  padding: 15px;
  margin-top: 20px;
  border-left: 5px solid #2980b9;
}

.error-message {
  color: #c0392b;
  margin-top: 15px;
  font-weight: bold;
}

footer {
  margin-top: 30px;
  text-align: center;
  font-size: 0.9em;
  color: #888;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

table th, table td {
  padding: 10px;
  border: 1px solid #ccc;
  text-align: left;
}