body {
  font-family: 'Segoe UI', sans-serif;
  background: #f5faff;
  margin: 0;
  padding: 20px;
  color: #333;
}
.container {
  max-width: 700px;
  background: #056b4f;
  margin: auto;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.08);
}
h1 {
  text-align: center;
  color: #007acc;
}
.tabs {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.tab-button {
  flex: 1;
  margin: 5px;
  padding: 10px;
  font-weight: bold;
  background: #e1f1ff;
  border: 1px solid #007acc;
  border-radius: 6px;
  cursor: pointer;
}
.tab-button.active {
  background: #007acc;
  color: white;
}
.tab-content {
  margin-top: 10px;
}
.hidden {
  display: none;
}
.date-inputs {
  display: flex;
  flex-direction: column;
  gap: 15px;
}
label {
  font-weight: 600;
}
input[type="date"],
input[type="number"] {
  padding: 10px;
  width: 100%;
  font-size: 16px;
  border-radius: 6px;
  border: 1px solid #ccc;
}
.buttons {
  margin-top: 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
button {
  padding: 10px 16px;
  border: none;
  background-color: #007acc;
  color: white;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s;
}
button:hover {
  background-color: #005f99;
}
.result {
  margin-top: 15px;
  background: #eaf6ff;
  padding: 15px;
  border-left: 5px solid #007acc;
  border-radius: 6px;
  font-size: 16px;
}
.seo-text {
  margin-top: 40px;
  padding: 20px;
  background: #f0f8ff;
  border-radius: 10px;
  line-height: 1.7;
}
.seo-text h2 {
  color: #004a80;
  margin-bottom: 10px;
}