body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #FFD6B2;
}

nav {
    background: white;
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    margin-left: 20px;
    text-decoration: none;
    color: #333;
    font-weight: 600;
    cursor: pointer;
}

.page {
    background: white;
    margin: 20px auto;
    max-width: 1100px;
    padding: 40px;
    border-radius: 6px;
    display: none;
}

.active {
    display: block;
}
.user-student-display {
  color: #333;
  font-weight: 700;
  font-size: 1.1em;
  margin: 0 20px;
  padding: 8px 12px;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-radius: 20px;
  border: 2px solid #ff8d2f;
  white-space: nowrap;
}
h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

h2 {
    font-size: 28px;
    margin-bottom: 16px;
}

p {
    line-height: 1.6;
    color: #444;
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

textarea {
    display: block;
    font-family: Arial, Helvetica, sans-serif;
    width: 100%;
    min-height: 100px;
    padding: 20px;
    border-radius: 6px;
    border: 1px solid #ccc;
    resize: none; 
    box-sizing: border-box;
}
.home-image {
    max-width: 400px;
    width: 100%;
    margin: 30px auto;
    display: block;
    border-radius: 8px;
}
.button:hover {
    background: #333;
}
.button {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 24px;
    background: black;
    color: white;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
}
.center {
    text-align: center;
}
.step-bar {
    margin-bottom: 30px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.step {
    color: #aaa;
}

.step.active {
    color: black;
}

footer {
    text-align: center;
    padding: 30px;
    color: #333;
}
/* Students Page Styles */
.students-list {
  margin: 20px 0;
}

.student-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px;
  margin: 10px 0;
  background: #f5f5f5;
  border-radius: 8px;
  border-left: 4px solid #007bff;
  cursor: pointer;
  transition: all 0.2s;
}

.student-item:hover {
  background: #e9ecef;
  transform: translateX(5px);
}

.student-item.selected {
  background: #d4edda;
  border-left-color: #28a745;
  box-shadow: 0 2px 10px rgba(40, 167, 69, 0.3);
}

.student-name {
  flex: 1;
  font-weight: bold;
  font-size: 1.1em;
}

.student-skill {
  color: #666;
  font-style: italic;
}

.student-info {
  flex: 1;
}

.student-actions {
  display: flex;
  gap: 10px;
}

.edit-btn, .remove-btn, .history-btn {
  padding: 8px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9em;
}

.edit-btn {
  background: #007bff;
  color: white;
}

.history-btn {
  background: #ff8d2f;
  color: white;
}

.remove-btn {
  background: #dc3545;
  color: white;
}

.history-btn:hover { 
  background: #c76210; 
}

.edit-btn:hover { 
  background: #0056b3; 
}

.remove-btn:hover { 
  background: #c82333; 
}

.current-student {
  background: #fff3cd;
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 20px;
  border: 2px solid #ffc107;
}

/* Student Popup */
.popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: none;
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.popup {
  background: white;
  padding: 30px;
  border-radius: 10px;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.popup h3 {
  margin-top: 0;
}

.popup input {
  width: 100%;
  padding: 10px;
  margin: 15px 0;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

.popup-buttons {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.popup-btn {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
}

.confirm-btn {
  background: #28a745;
  color: white;
}

.cancel-btn {
  background: #6c757d;
  color: white;
}
/* History Popup */
#historyPopup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: none;
  z-index: 1001;
  justify-content: center;
  align-items: center;
}

.history-list {
  max-height: 400px;
  overflow-y: auto;
  margin: 15px 0;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #f8f9fa;
}

.history-item {
  padding: 12px 15px;
  border-bottom: 1px solid #eee;
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.history-item:hover {
  background: #e9ecef;
}

.history-item:last-child {
  border-bottom: none;
}

.history-item.selected {
  background: #d4edda;
  border-left: 4px solid #28a745;
}

.history-preview {
  font-size: 0.95em;
  color: #495057;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 300px;
}

.history-date {
  font-size: 0.85em;
  color: #6c757d;
  white-space: nowrap;
}

.history-count {
  background: #007bff;
  color: white;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8em;
  font-weight: bold;
}

/* Confirm Remove Popup */
#removePopup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: none;
  z-index: 1002;
  justify-content: center;
  align-items: center;
}

#removePopup .popup {
  text-align: left;
  max-width: 350px;
}

#removePopup .popup h3 {
  color: #000000;
  margin-bottom: 10px;
}