:root {
  --bg: #f7f7f8;
  --card-bg: #ffffff;
  --border: #dcdde0;
  --text: #1c1e21;
  --text-muted: #6b7076;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #b42318;
  --danger-bg: #fdf2f1;
  --danger-border: #f3c6c2;
  --low-bg: #fdecea;
  --low-border: #f2b8b5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.page-header h1 {
  margin: 0 0 6px;
  font-size: 1.6rem;
}

.subtitle {
  margin: 0 0 28px;
  color: var(--text-muted);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
}

.field {
  margin-bottom: 18px;
}

.field:last-of-type {
  margin-bottom: 0;
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

select,
textarea,
input[type="file"] {
  width: 100%;
  font: inherit;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 10px;
  background: #fff;
}

textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
}

select:focus,
textarea:focus,
input[type="file"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.hint {
  margin: 6px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.link-btn {
  display: inline-block;
  margin-top: 10px;
  padding: 0;
  background: none;
  border: none;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
}

.link-btn:hover {
  color: var(--accent-hover);
  background: none;
}

.actions {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

button {
  font: inherit;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
}

button:hover:not(:disabled) {
  background: var(--accent-hover);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

button.secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

button.secondary:hover:not(:disabled) {
  background: #f2f2f3;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

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

.results-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
}

th,
td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: #f2f2f4;
  font-weight: 600;
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: none;
}

tr.row-low td {
  background: var(--low-bg);
}

.flag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--danger);
  background: #fff;
  border: 1px solid var(--danger-border);
  border-radius: 4px;
  padding: 1px 6px;
  margin-left: 6px;
  white-space: nowrap;
}

.why-toggle {
  display: inline-block;
  margin-left: 6px;
  vertical-align: middle;
}

.why-toggle summary {
  display: inline-block;
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.78rem;
  list-style: none;
}

.why-toggle summary::-webkit-details-marker {
  display: none;
}

.why-toggle summary:hover {
  color: var(--accent-hover);
}

.why-toggle .why-notes {
  margin-top: 6px;
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--text);
  white-space: pre-wrap;
  max-width: 32ch;
}

.note-block {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fafafa;
  font-size: 0.88rem;
  white-space: pre-wrap;
}

.warning-block {
  padding: 16px;
  border: 1px solid #f2c94c;
  background: #fffbea;
  border-radius: 8px;
  white-space: pre-wrap;
}

.error-block {
  padding: 16px;
  border: 1px solid var(--danger-border);
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: 8px;
  white-space: pre-wrap;
}

@media print {
  body {
    background: #fff;
  }

  .page {
    max-width: none;
    padding: 0;
  }

  .page-header,
  #syllabus-form,
  .results-actions {
    display: none !important;
  }

  .results.card {
    border: none;
    padding: 0;
    margin: 0;
  }

  .table-wrap {
    border: none;
    overflow: visible;
  }

  table {
    font-size: 10pt;
  }

  th {
    background: #eee !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  tr.row-low td {
    background: #f5f5f5 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .flag {
    border: 1px solid #999;
    color: #000;
    background: none;
  }

  tr {
    break-inside: avoid;
  }
}