:root {
  --primary-color: #3498db;
  --secondary-color: #95a5a6;
  --dark-color: #2c3e50;
  --light-color: #ecf0f1;
  --bg-color: #f4f6f9;
  --white-color: #ffffff;
  --danger-color: #e74c3c;
  --warning-color: #f39c12;
  --success-color: #27ae60;
  --font-family: "Sarabun", sans-serif;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  margin: 0;
  color: #333;
}
header {
  background-color: var(--white-color);
  color: var(--dark-color);
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #e0e0e0;
}
header h1 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--dark-color);
  font-weight: 600;
}
.user-info {
  font-size: 0.9rem;
}
.user-info a {
  color: var(--primary-color);
  text-decoration: none;
  margin-left: 1rem;
  font-weight: 500;
}
.user-info a:hover {
  text-decoration: underline;
}

.app-container {
  display: flex;
  height: calc(100vh - 65px); /* Adjust to your header's actual height */
}

.sidebar {
  width: 250px;
  background-color: var(--dark-color);
  color: var(--light-color);
  padding: 1rem 0.75rem;
  overflow-y: auto;
  transition: width 0.3s ease;
}
.sidebar nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar nav ul li a {
  display: block;
  padding: 0.8rem 1rem;
  text-decoration: none;
  color: var(--light-color);
  border-radius: var(--border-radius);
  margin-bottom: 0.25rem;
  transition: all 0.2s ease;
  font-weight: 500;
}
.sidebar nav ul li a:hover {
  background-color: rgba(255, 255, 255, 0.15);
  padding-left: 1.25rem; /* Slight indent on hover */
}
.sidebar nav ul li a.active {
  background-color: var(--primary-color);
  color: var(--white-color);
  font-weight: 500;
  padding-left: 1.25rem; /* Keep indent when active */
}

.main-content {
  flex-grow: 1;
  padding: 2rem;
  overflow-y: auto;
  min-width: 0;
}
footer {
  text-align: center;
  padding: 1rem;
  background-color: var(--white-color);
  color: #777;
  font-size: 0.9rem;
  border-top: 1px solid #e0e0e0;
}

/* Login Form */
.login-container {
  max-width: 400px;
  margin: 5rem auto;
  padding: 2rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
}
.form-group {
  margin-bottom: 1rem;
  text-align: left;
}
.form-group label {
  display: block;
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}
button {
  padding: 0.6rem 1.2rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: var(--font-family);
  transition:
    background-color 0.2s ease,
    transform 0.1s ease;
  font-weight: 500;
}
button:hover {
  background-color: #2980b9;
  transform: translateY(-1px);
}
.login-container button {
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
}
.error {
  color: #721c24;
  background-color: #f8d7da;
  border: 1px solid #f5c6cb;
  padding: 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  background-color: var(--white-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
th,
td {
  padding: 1rem;
  border-bottom: 1px solid var(--light-color);
  text-align: left;
}
th {
  background-color: #f8f9fa;
  font-weight: 600;
  color: #34495e;
}
tr:last-child td {
  border-bottom: none;
}
tr:hover {
  background-color: #fdfdfd;
}

/* --- เพิ่มเติมสำหรับหน้า CRUD --- */
.toolbar {
  margin-bottom: 1rem;
}
.button-primary,
.button-secondary,
.button-edit,
.button-delete {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  font-family: var(--font-family);
  transition:
    background-color 0.2s ease,
    transform 0.1s ease;
  font-weight: 500;
}
.button-primary:hover,
.button-secondary:hover,
.button-edit:hover,
.button-delete:hover {
  transform: translateY(-1px);
}
.button-primary {
  background-color: var(--primary-color);
  color: white;
}
.button-primary:hover {
  background-color: #2980b9;
}

.button-secondary {
  background-color: var(--secondary-color);
  color: white;
}
.button-secondary:hover {
  background-color: #7f8c8d;
}

.button-edit {
  background-color: var(--warning-color);
  color: var(--dark-color);
}
.button-edit:hover {
  background-color: #d4ac0d;
}

.button-delete {
  background-color: var(--danger-color);
  color: white;
}
.button-delete:hover {
  background-color: #c0392b;
}

.form-layout {
  background-color: var(--white-color);
  padding: 1.5rem 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}
.form-layout .form-group {
  margin-bottom: 1rem;
}
.form-layout .form-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}
.table-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  align-items: center;
}
.success {
  color: #145a32;
  background-color: #d4edda;
  border: 1px solid #c3e6cb;
  padding: 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}
.csv-import-form {
  display: inline-block;
  margin-left: 1rem;
  padding: 0.5rem;
  border: 1px solid #ddd;
  background-color: #f8f9fa;
  border-radius: 4px;
}
.score-input {
  width: 80px;
  padding: 0.25rem;
}
.active-row {
  background-color: #d4edda !important;
  font-weight: bold;
}
.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.sidebar .menu-header {
  padding: 1.5rem 1rem 0.5rem;
  font-size: 0.75rem;
  color: #7f8c8d;
  text-transform: uppercase;
  font-weight: bold;
  letter-spacing: 0.05em;
}
@media print {
  .transcript-container:last-child {
    page-break-after: auto;
  }
}