:root {
  --primary: #3498db;
  --success: #2ecc71;
  --danger: #e74c3c;
  --warning: #f39c12;
  --dark: #2c3e50;
  --light: #ecf0f1;
  --save: #17a2b8;
}

/* Added back button styles */
.back-button {
  position: fixed;
  top: 20px;
  left: 20px;
  background: white;
  color: var(--primary);
  padding: 12px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s;
  z-index: 1000;
}

.back-button:hover {
  background: var(--primary);
  color: white;
  transform: translateX(-3px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f8f9fa;
  margin: 0;
  padding: 20px;
  color: #343a40;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: var(--dark);
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.summary-cards {
  display: flex;
  justify-content: space-between;
  margin-bottom: 30px;
  gap: 20px;
  flex-wrap: wrap;
}

.card {
  flex: 1;
  min-width: 200px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
}

.card-icon {
  font-size: 24px;
  width: 50px;
  height: 50px;
  background: var(--light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.card-content {
  display: flex;
  flex-direction: column;
}

.card-content span:first-child {
  font-size: 14px;
  color: #7f8c8d;
}

.card-content span:last-child {
  font-size: 24px;
  font-weight: bold;
  color: var(--dark);
}

#general-average {
  color: var(--primary);
}

#total-lost {
  color: var(--danger);
}

.table-container {
  overflow-x: auto;
  margin-bottom: 30px;
  border: 1px solid #dee2e6;
  border-radius: 8px;
  position: relative;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 15px;
  text-align: center;
  border-bottom: 1px solid #dee2e6;
}

th {
  background-color: var(--primary);
  color: white;
  font-weight: bold;
  position: sticky;
  top: 0;
  user-select: none;
}

tr:nth-child(even) {
  background-color: #f8f9fa;
}

tr:hover {
  background-color: #f1f8fe;
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #ced4da;
  border-radius: 4px;
  text-align: center;
  transition: all 0.3s;
  font-family: inherit;
}

input[type="text"]:focus,
input[type="number"]:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.course-name {
  min-width: 150px;
  text-align: left;
}

.average {
  font-weight: bold;
  color: var(--dark);
}

.lost-points {
  font-weight: bold;
  color: var(--danger);
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 20px;
}

/* Added styles for quick load section */
.quick-load-section {
  background: var(--light);
  padding: 20px;
  border-radius: 8px;
}

.quick-load-section h3 {
  margin: 0 0 15px 0;
  color: var(--dark);
  font-size: 16px;
  text-align: center;
}

.quick-load-buttons {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-quick-load {
  background: linear-gradient(135deg, var(--primary), #2980b9);
  color: white;
  font-size: 14px;
}

.btn-quick-load:hover {
  background: linear-gradient(135deg, #2980b9, var(--primary));
}

.main-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-add {
  background-color: var(--success);
  color: white;
}

.btn-reset {
  background-color: var(--danger);
  color: white;
}

.btn-undo {
  background-color: #6c757d;
  color: white;
}

.btn-undo:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-save {
  background-color: var(--save);
  color: white;
}

.delete-btn {
  color: var(--danger);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.3s;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.delete-btn:hover {
  background-color: #fee;
  transform: scale(1.1);
}

.drag-handle {
  cursor: move;
  color: #95a5a6;
  font-size: 16px;
  padding: 5px;
}

.drag-handle:hover {
  color: var(--primary);
}

.sortable-ghost {
  background-color: #f1f8fe !important;
  opacity: 0.7;
}

tr.delete-warning {
  animation: pulseWarning 1.5s infinite;
  background-color: #fff3cd !important;
}

@keyframes pulseWarning {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

tr.undo-animation {
  animation: undoFadeIn 0.5s ease-out;
  background-color: #d4edda !important;
}

@keyframes undoFadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 4px;
  color: white;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1000;
  max-width: 90%;
  text-align: center;
}

.toast.show {
  opacity: 1;
}

.toast.success {
  background-color: var(--success);
}

.toast.error {
  background-color: var(--danger);
}

.toast.warning {
  background-color: var(--warning);
  color: var(--dark);
}

@media (max-width: 768px) {
  /* Made back button responsive */
  .back-button {
    position: static;
    margin-bottom: 15px;
    justify-content: center;
  }

  .container {
    padding: 15px;
  }

  .card {
    min-width: 100%;
  }

  .controls {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    margin-bottom: 10px;
  }

  th,
  td {
    padding: 8px 10px;
    font-size: 14px;
  }

  input[type="text"],
  input[type="number"] {
    padding: 6px 8px;
    font-size: 13px;
  }

  .toast {
    width: 90%;
    font-size: 14px;
  }

  /* Made quick load buttons responsive */
  .quick-load-buttons {
    flex-direction: column;
  }

  .btn-quick-load {
    width: 100%;
  }

  .main-controls {
    flex-direction: column;
  }

  .main-controls .btn {
    width: 100%;
  }
}