* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  padding: 20px;
  line-height: 1.5;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

header {
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #000;
}

header h1 {
  font-size: 2em;
  margin-bottom: 5px;
}

.subtitle {
  font-size: 0.9em;
  color: #666;
}

.input-section {
  background: #fff;
  border: 1px solid #000;
  padding: 15px;
  margin-bottom: 20px;
}

.input-section h2 {
  font-size: 1.2em;
  margin-bottom: 8px;
}

.instructions {
  color: #666;
  margin-bottom: 8px;
  font-size: 0.9em;
}

#gradeInput {
  width: 100%;
  height: 120px;
  padding: 8px;
  border: 1px solid #000;
  font-family: monospace;
  font-size: 12px;
  resize: vertical;
  margin-bottom: 8px;
}

button {
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid #000;
  background: #fff;
}

button:hover {
  background: #000;
  color: #fff;
}

.btn-primary {
  background: #000;
  color: #fff;
}

.btn-clear {
  background: #fff;
  margin-bottom: 15px;
}

.error-msg {
  background: #fdd;
  border: 1px solid #f00;
  padding: 10px;
  margin-bottom: 15px;
  display: none;
}

.error-msg.show {
  display: block;
}

.grade-scale-card {
  background: #fff;
  border: 1px solid #000;
  padding: 15px;
  margin-bottom: 20px;
}

.grade-scale-card h3 {
  margin-bottom: 10px;
}

.grade-scale-table {
  display: grid;
  grid-template-columns: 150px 150px auto;
  gap: 8px;
  margin-bottom: 10px;
}

.scale-header {
  font-weight: bold;
  padding: 5px;
  border-bottom: 1px solid #000;
}

.scale-input {
  padding: 5px;
  border: 1px solid #000;
  font-size: 14px;
}

.class-card {
  background: #fff;
  border: 2px solid #000;
  padding: 20px;
  margin-bottom: 20px;
}

.class-header {
  border-bottom: 1px solid #000;
  padding-bottom: 10px;
  margin-bottom: 15px;
}

.class-name {
  font-size: 1.5em;
  font-weight: bold;
  margin-bottom: 5px;
}

.class-info {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.info-item {
  border: 1px solid #000;
  padding: 10px 15px;
}

.info-label {
  font-size: 0.8em;
  color: #666;
}

.info-value {
  font-size: 1.5em;
  font-weight: bold;
}

.grade-A {
  color: green;
}
.grade-B {
  color: blue;
}
.grade-C {
  color: orange;
}
.grade-D {
  color: red;
}
.grade-F {
  color: darkred;
}

.category {
  margin-bottom: 20px;
}

.category-header {
  background: #000;
  color: #fff;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.category-title {
  font-weight: bold;
}

.category-stats {
  display: flex;
  gap: 15px;
  align-items: center;
  font-size: 0.9em;
}

.weight-editor {
  display: flex;
  align-items: center;
  gap: 5px;
}

.weight-input {
  width: 45px;
  padding: 3px;
  border: none;
  text-align: center;
}

.assignments {
  border: 1px solid #000;
  border-top: none;
  padding: 10px;
  background: #fafafa;
}

.assignment {
  background: #fff;
  border: 1px solid #ccc;
  border-left: 3px solid #000;
  padding: 10px;
  margin-bottom: 8px;
}

.assignment.ungraded {
  border-left-color: orange;
  background: #fffbf0;
}

.assignment.missing {
  border-left-color: #d32f2f;
  background: #ffebee;
}

.missing-badge {
  display: inline-block;
  background: #d32f2f;
  color: #fff;
  font-size: 0.7em;
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: bold;
  margin-left: 8px;
}

.assignment-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 10px;
}

.assignment-name {
  font-weight: bold;
  flex: 1;
}

.assignment-due {
  font-size: 0.85em;
  color: #666;
  margin-top: 2px;
}

.assignment-score {
  display: flex;
  gap: 8px;
  align-items: center;
}

.score-display {
  font-weight: bold;
}

.score-editor {
  display: flex;
  gap: 5px;
  align-items: center;
}

.score-input {
  width: 60px;
  padding: 3px;
  border: 1px solid #000;
  text-align: center;
  font-size: 13px;
}

.assignment-comments {
  font-size: 0.85em;
  color: #666;
  font-style: italic;
  margin-top: 5px;
}

.add-section {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed #999;
}

.add-form {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: 8px;
  margin-top: 8px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.8em;
  color: #666;
  margin-bottom: 3px;
}

.form-group input {
  padding: 5px;
  border: 1px solid #000;
  font-size: 13px;
}

.btn-remove {
  background: #f00;
  color: #fff;
  padding: 3px 8px;
  font-size: 11px;
  border: none;
}

.btn-remove:hover {
  background: #c00;
}

@media (max-width: 768px) {
  .class-info {
    flex-direction: column;
    gap: 10px;
  }

  .category-header {
    flex-direction: column;
    gap: 8px;
    align-items: start;
  }

  .add-form {
    grid-template-columns: 1fr;
  }

  .assignment-header {
    flex-direction: column;
  }
}