.autograder-app {
  box-sizing: border-box;
  max-width: 1180px;
  margin: 20px auto;
  padding: 0 14px 20px;
  color: #1f1f1f;
  font-family: inherit;
}

.autograder-app h2 {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1.2;
  font-style: normal;
  font-family: inherit;
  font-weight: 700;
}

.autograder-app h3 {
  margin: 0;
  font-size: 22px;
  font-style: normal;
  font-family: inherit;
  font-weight: 700;
}

.autograder-app .ag-hero {
  border: 1px solid #e7e7e7;
  border-top: 4px solid #c8161e;
  border-radius: 12px;
  padding: 16px 18px;
  background: #fff;
  margin-bottom: 16px;
}

.autograder-app .ag-hero p {
  margin: 0;
  color: #555;
}

.autograder-app .ag-hero ul {
  margin: 10px 0 0;
  padding-left: 20px;
  list-style-type: disc;
  list-style-position: outside;
  color: #666;
  font-size: 14px;
}

.autograder-app .ag-hero li {
  margin: 4px 0;
}

article .autograder-app .ag-hero ul > li::before {
  content: none;
}

.autograder-app .ag-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.autograder-app .ag-panel {
  border: 1px solid #e7e7e7;
  border-radius: 12px;
  background: #fff;
  padding: 16px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.autograder-app .ag-field {
  display: grid;
  gap: 8px;
  font-size: 16px;
}

.autograder-app .ag-native-file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.autograder-app .ag-file-picker {
  width: 100%;
  border: 1px dashed #d7b2b3;
  border-radius: 12px;
  background: #fafafa;
  text-align: left;
  padding: 12px;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.autograder-app .ag-file-picker:hover,
.autograder-app .ag-file-picker:focus-visible,
.autograder-app .ag-file-picker.dragging {
  border-color: #c8161e;
  box-shadow: 0 0 0 3px rgba(200, 22, 30, 0.12);
}

.autograder-app .ag-file-picker-title {
  display: block;
  font-weight: 700;
  color: #333;
}

.autograder-app .ag-file-picker-name {
  display: block;
  margin-top: 4px;
  color: #8a2a2c;
  font-size: 14px;
  word-break: break-all;
}

.autograder-app .ag-field small {
  color: #666;
  font-size: 14px;
  line-height: 1.4;
}

.autograder-app .ag-actions {
  display: flex;
  justify-content: center;
}

.autograder-app .ag-btn-primary {
  width: 140px;
  min-width: 140px;
  white-space: nowrap;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, #c8161e, #a70f17);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  padding: 10px 22px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 6px 14px rgba(167, 15, 23, 0.28);
}

.autograder-app .ag-btn-primary:hover {
  transform: translateY(-1px);
}

.autograder-app .ag-btn-primary:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
  box-shadow: none;
}

.autograder-app .ag-status-line {
  border: 1px solid #f0d1d1;
  border-radius: 10px;
  background: #fff7f7;
  color: #8f282b;
  padding: 8px 10px;
  font-size: 14px;
}

.autograder-app .ag-summary {
  border: 1px solid #e4e4e4;
  border-radius: 12px;
  padding: 12px;
  font-size: 18px;
  font-weight: 700;
}

.autograder-app .ag-summary-empty {
  color: #666;
  font-weight: 500;
}

.autograder-app .ag-summary-ok {
  border-color: rgba(22, 101, 52, 0.36);
  background: rgba(22, 101, 52, 0.06);
}

.autograder-app .ag-summary-bad {
  border-color: rgba(153, 27, 27, 0.36);
  background: rgba(153, 27, 27, 0.06);
}

.autograder-app .ag-tamper,
.autograder-app .ag-checks {
  display: grid;
  gap: 8px;
}

.autograder-app .ag-tamper-item,
.autograder-app .ag-check-item {
  border: 1px solid #e5e5e5;
  border-radius: 10px;
  padding: 10px;
  background: #fff;
}

.autograder-app .ag-tamper-item {
  border-color: rgba(153, 27, 27, 0.35);
  background: rgba(153, 27, 27, 0.04);
}

.autograder-app .ag-check-item-pass {
  border-color: rgba(22, 101, 52, 0.35);
}

.autograder-app .ag-check-item-fail {
  border-color: rgba(180, 83, 9, 0.35);
  background: rgba(180, 83, 9, 0.05);
}

.autograder-app .ag-check-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-weight: 700;
}

.autograder-app .ag-check-question {
  margin-top: 6px;
  border-radius: 8px;
  background: rgba(200, 22, 30, 0.06);
  color: #5f3b3b;
  font-size: 13px;
  line-height: 1.35;
  padding: 6px 8px;
}

.autograder-app .ag-check-meta {
  margin-top: 6px;
  color: #555;
  font-size: 14px;
  white-space: pre-wrap;
}

@media (min-width: 980px) {
  .autograder-app .ag-grid {
    grid-template-columns: minmax(340px, 420px) minmax(0, 1fr);
    align-items: start;
  }

  .autograder-app .ag-result-panel {
    max-height: 74vh;
    overflow-y: auto;
    padding-right: 10px;
  }
}