body {
  font-family: Arial, sans-serif;
  background-color: #f4f6f8;
  margin: 0;
  padding: 0;
  color: #333;
}

header {
  background-color: #2b5797;
  color: white;
  padding: 15px 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: 1px;
}

main {
  max-width: 1000px;
  margin: 20px auto;
  background: white;
  padding: 20px 30px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

h2 {
  margin-top: 0;
  color: #2b5797;
  font-size: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 25px;
}

th, td {
  border: 1px solid #ccc;
  padding: 8px 10px;
  text-align: left;
}

th {
  background-color: #f0f0f0;
}

.actions a {
  background-color: #2b5797;
  color: white;
  padding: 4px 8px;
  text-decoration: none;
  border-radius: 4px;
  margin-right: 5px;
  font-size: 13px;
}

.actions a.delete {
  background-color: #c0392b;
}

.form-section {
  background-color: #f9fafb;
  padding: 15px;
  border-radius: 6px;
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 10px;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 3px;
}

textarea {
  resize: vertical;
}

button {
  background-color: #2b5797;
  color: white;
  border: none;
  padding: 8px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background-color: #1e3e73;
}

/* ------- TABS -------- */

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  background: #ccc;
  border-radius: 6px;
  font-size: 16px;
}

.tab-btn.active {
  background: #2d6cdf;
  color: white;
}

.tab-page {
  display: none;
}

.tab-page.active {
  display: block;
}

.history-box {
  background: #f2f2f2;
  padding: 10px;
  border-radius: 6px;
  max-height: 250px;
  overflow-y: auto;
  font-size: 14px;
  margin-top: 10px;
}