:root {
  --green: #1e3a5f;
  --green-dark: #14283e;
  --green-light: #e8eef5;
  --border: #ddd;
  --bg: #f6f6f6;
  --text: #282828;
  --mono: Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: #fff;
}

.topbar {
  background: var(--green);
  color: #fff;
  padding: 14px 24px;
  position: relative;
}
.user-bar {
  position: absolute;
  top: 14px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.user-bar.hidden { display: none; }
.user-link {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 12.5px;
  cursor: pointer;
}
.user-link:hover { background: rgba(255,255,255,0.25); }
.user-link.hidden { display: none; }
.login-btn {
  position: absolute;
  top: 14px;
  right: 24px;
}
.login-cancel-btn {
  display: block;
  width: 100%;
  margin-top: 14px;
  background: var(--bg);
  color: #333;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
}
.login-cancel-btn:hover { background: #eee; }
.login-cancel-btn.hidden { display: none; }

.trial-banner {
  background: #fff8e1;
  border-bottom: 1px solid #f0d98c;
  color: #7a5c00;
  font-size: 13px;
  padding: 8px 24px;
  text-align: center;
}
.trial-banner.hidden { display: none; }
.trial-banner a, .trial-banner button.link-btn {
  color: #7a5c00;
  font-weight: 600;
  text-decoration: underline;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  padding: 0;
}
.topbar h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
}
.topbar h1 span {
  font-weight: 400;
  opacity: 0.9;
}
.topbar-meta {
  margin-top: 4px;
  font-size: 13px;
  opacity: 0.9;
}
.topbar-meta code {
  background: rgba(255,255,255,0.2);
  padding: 1px 5px;
  border-radius: 3px;
}

.layout {
  display: flex;
  align-items: stretch;
  min-height: calc(100vh - 64px);
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg);
  border-right: 1px solid var(--border);
  padding: 0;
  overflow-y: auto;
}
.sidebar-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #888;
  padding: 0 16px 8px;
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}
.sidebar-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 12px 8px;
  font-size: 13px;
  font-weight: 600;
  color: #888;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}
.sidebar-tab.active {
  color: var(--green-dark);
  border-bottom-color: var(--green);
}
.sidebar-panel { padding: 12px 0; }
.sidebar-panel.hidden { display: none; }

.table-source {
  display: flex;
  gap: 6px;
  padding: 0 8px 10px;
}
.source-btn {
  flex: 1;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 4px;
  font-size: 11.5px;
  cursor: pointer;
  color: #666;
}
.source-btn.active {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
  font-weight: 600;
}

.nav-group-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #999;
  padding: 14px 16px 6px;
}
.nav-group-label:first-child { padding-top: 4px; }
.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 6px 16px;
  font-size: 13.5px;
  color: #444;
  text-decoration: none;
  border-left: 3px solid transparent;
}
.nav-item:hover { background: #eee; }
.nav-item.active {
  border-left-color: var(--green);
  background: var(--green-light);
  color: var(--green-dark);
  font-weight: 600;
}
.nav-check { color: var(--green); font-size: 12px; flex-shrink: 0; }


.schema-tree { padding: 0 8px; }
.schema-group-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #999;
  padding: 12px 8px 4px;
}
.schema-group-label:first-child { padding-top: 4px; }
.table-item { margin-bottom: 2px; }
.table-name {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 14px;
  color: var(--green-dark);
  font-weight: 600;
}
.table-name:hover { background: var(--green-light); }
.table-name .caret {
  font-size: 10px;
  color: #999;
  transition: transform 0.15s;
  width: 10px;
}
.table-item.open .caret { transform: rotate(90deg); }

.columns {
  display: none;
  padding: 2px 0 6px 22px;
}
.table-item.open .columns { display: block; }
.column-row {
  font-size: 12.5px;
  font-family: var(--mono);
  color: #555;
  padding: 2px 0;
  display: flex;
  gap: 6px;
}
.column-row .pk { color: var(--green); font-weight: 700; }
.column-row .type { color: #999; }

.content {
  flex: 1;
  padding: 20px 24px;
  min-width: 0;
  max-width: 1400px;
}

/* Prose reads best at a moderate line length — cap it even though .content
   itself is wide, so the editor/result table below can use the extra room. */
.lesson-progress-tag {
  font-size: 12px;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
#lesson-body h2 {
  margin: 0 0 12px;
  font-size: 24px;
  color: #222;
  max-width: 800px;
}
#lesson-body p {
  font-size: 15px;
  line-height: 1.6;
  color: #333;
  margin: 0 0 12px;
  max-width: 800px;
}
#lesson-body code {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 13px;
}
#lesson-body a { color: var(--green-dark); }
.author-intro {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 800px;
  margin-bottom: 16px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.author-photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.author-intro ul {
  margin: 6px 0 0;
  padding-left: 18px;
  font-size: 13.5px;
  color: #555;
}
.author-intro li { margin-bottom: 2px; }

#editor-section { margin-top: 16px; }
#editor-section.hidden { display: none; }

.toolbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.reset-btn {
  background: #fff;
  color: #a4231d;
  border: 1px solid #f5b5ae;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.reset-btn:hover { background: #fdecea; }

.print-btn {
  background: #fff;
  color: #444;
  border: 1px solid var(--border);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  margin-right: auto;
}
.print-btn:hover { background: var(--bg); }

.print-only { display: none; }

.lesson-pager {
  display: flex;
  justify-content: space-between;
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.pager-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 18px;
  font-size: 13px;
  border-radius: 4px;
  cursor: pointer;
  color: #333;
}
.pager-btn:hover:not(:disabled) { background: var(--green-light); border-color: var(--green); }
.pager-btn:disabled { opacity: 0.4; cursor: default; }

.editor-box {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.CodeMirror {
  height: 160px;
  font-family: var(--mono);
  font-size: 14px;
}

.run-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
}
.run-btn {
  background: var(--green);
  color: #fff;
  border: none;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.run-btn:hover { background: var(--green-dark); }
.run-btn:disabled { opacity: 0.6; cursor: default; }

.auth-status { font-size: 13px; color: #888; }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid #ddd;
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.spinner.hidden { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

.error {
  margin-top: 14px;
  padding: 10px 14px;
  background: #fdecea;
  border: 1px solid #f5b5ae;
  color: #a4231d;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 13px;
  white-space: pre-wrap;
}
.error.hidden { display: none; }
.error-hint {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed #f5b5ae;
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  white-space: normal;
  color: #7a3b10;
}
.error-hint code {
  background: rgba(0,0,0,0.06);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 12px;
}

.grade-badge {
  margin-top: 10px;
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
}
.grade-badge.hidden { display: none; }
.grade-correct { background: var(--green-light); border: 1px solid var(--green); color: var(--green-dark); }
.grade-pending { background: var(--bg); border: 1px solid var(--border); color: #555; }

.exercise-box {
  margin: 14px 0;
  padding: 12px 16px;
  background: #fff8e6;
  border: 1px solid #f0d78c;
  border-radius: 4px;
  max-width: 800px;
}
.exercise-box.hidden { display: none; }
.exercise-box strong { color: #8a6d1a; font-size: 13px; }
.exercise-box p { margin: 6px 0 0; font-size: 14px; line-height: 1.5; color: #333; }
.exercise-note {
  font-size: 12.5px !important;
  color: #8a6d1a !important;
  border-top: 1px dashed #f0d78c;
  padding-top: 6px !important;
  margin-top: 8px !important;
}
.exercise-box code {
  background: rgba(0,0,0,0.06);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 12.5px;
}

.lesson-tables {
  margin: 0 0 14px;
  padding: 14px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  max-width: 1200px;
}
.lesson-tables.hidden { display: none; }
.lesson-tables-title { font-size: 13px; font-weight: 600; color: #555; margin-bottom: 4px; }
.lesson-tables-legend { font-size: 11.5px; color: #999; margin-bottom: 10px; }
.lesson-tables-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-start;
}
.lesson-table-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 14px 12px;
  min-width: 220px;
}
.lesson-table-name {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.lesson-table-cols { columns: 2; column-gap: 18px; }
.lesson-table-cols-single { columns: 1; min-width: 200px; }
.lesson-table-col-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  padding: 2px 0;
  break-inside: avoid;
  white-space: nowrap;
}
.lesson-table-col-row.pk { color: var(--green-dark); }
.lesson-col-name { color: #444; }
.lesson-table-col-row.pk .lesson-col-name { font-weight: 700; }
.lesson-col-type { color: #999; padding-left: 8px; }

.lesson-diagram-wrap { position: relative; overflow-x: auto; }
.lesson-diagram-lines { position: absolute; top: 0; left: 0; pointer-events: none; overflow: visible; }
.lesson-diagram-line { fill: none; stroke: #9aa4ad; stroke-width: 1.5; }
.lesson-diagram-dot { fill: #9aa4ad; }

.collate-breakdown {
  max-width: 800px;
  margin: 0 0 14px;
  padding: 14px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.collate-name {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px;
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
}
.collate-name .collate-sep { color: #999; font-weight: 400; }
.collate-part { padding: 1px 3px; border-radius: 3px; }
.collate-part.locale { background: #dbe7f5; color: #1e3a5f; }
.collate-part.case { background: #ffe8b3; color: #8a6d1a; }
.collate-part.accent { background: #d9f0dd; color: #226633; }
.collate-legend { display: flex; flex-direction: column; gap: 6px; }
.collate-legend-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13.5px;
  line-height: 1.5;
  color: #333;
}
.collate-dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-top: 4px;
}
.collate-dot.locale { background: #7ea6d6; }
.collate-dot.case { background: #e0ac2e; }
.collate-dot.accent { background: #5cae72; }

table.collate-table, table.info-table {
  border-collapse: collapse;
  max-width: 800px;
  width: 100%;
  font-size: 13px;
  margin-bottom: 6px;
}
table.collate-table th, table.collate-table td, table.info-table th, table.info-table td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
}
table.collate-table th, table.info-table th { background: var(--bg); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; color: #555; }
table.collate-table td code, table.info-table td code { font-size: 12px; }
table.collate-table tr:nth-child(even), table.info-table tr:nth-child(even) { background: #fafafa; }
table.info-table td.status-broken { color: #a4231d; font-weight: 600; }
table.info-table td.status-ok { color: #226633; font-weight: 600; }

.concept-complete { margin: 14px 0; }
.concept-complete.hidden { display: none; }
.concept-complete-btn {
  background: #fff;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.concept-complete-btn:hover:not(:disabled) { background: var(--green-light); }
.concept-complete-btn:disabled {
  background: var(--green-light);
  color: var(--green-dark);
  cursor: default;
}

.ai-settings-btn {
  background: #fff;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.ai-settings-btn:hover { background: var(--green-light); }

.ai-help { margin-top: 10px; }
.ai-help.hidden { display: none; }
.ai-help-btn {
  background: var(--green);
  color: #fff;
  border: none;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.ai-help-btn:hover:not(:disabled) { background: var(--green-dark); }
.ai-help-btn:disabled { opacity: 0.6; cursor: default; }
.ai-answer {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--green-light);
  border: 1px solid var(--green);
  border-radius: 4px;
  font-size: 13.5px;
  line-height: 1.5;
}
.ai-answer pre {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 12px;
  overflow-x: auto;
  margin: 8px 0;
  font-family: var(--mono);
  font-size: 12.5px;
}
.ai-answer p { margin: 0 0 8px; }
.ai-answer p:last-child { margin-bottom: 0; }

.ask-ai-section {
  margin: 20px 0;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  max-width: 800px;
}
.ask-ai-header { font-size: 13.5px; font-weight: 600; color: #444; margin-bottom: 8px; }
.ask-ai-form { display: flex; gap: 8px; align-items: flex-start; }
.ask-ai-form textarea {
  flex: 1;
  resize: vertical;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 13.5px;
}
.ask-ai-form .ai-help-btn { flex-shrink: 0; }

.ai-remove-btn {
  width: 100%;
  margin-top: 8px;
  background: #fff;
  color: #a4231d;
  border: 1px solid #f5b5ae;
}
.ai-remove-btn:hover { background: #fdecea; }
.ai-remove-btn.hidden { display: none; }
.ai-note { font-size: 11.5px; color: #999; margin-top: 12px; }
.ai-provider-hint { font-size: 12.5px; color: #666; margin-top: -6px; }
.ai-provider-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}
.ai-provider-tab {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: 4px;
  cursor: pointer;
  color: #444;
}
.ai-provider-tab:hover { background: #eee; }
.ai-provider-tab.active {
  background: var(--green-light);
  border-color: var(--green);
  color: var(--green-dark);
}

.meta {
  margin-top: 10px;
  font-size: 13px;
  color: #666;
}

.result { margin-top: 10px; overflow: auto; max-height: 65vh; }
table.result-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
}
table.result-table th, table.result-table td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
  white-space: nowrap;
}
table.result-table th {
  background: var(--bg);
  position: sticky;
  top: 0;
}
table.result-table tr:nth-child(even) { background: #fafafa; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: #fff;
  border-radius: 6px;
  padding: 24px;
  width: 320px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.modal h2 { margin: 0 0 8px; font-size: 18px; }
.modal p { margin: 0 0 14px; font-size: 13px; color: #666; }
.modal input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
  margin-bottom: 10px;
}
.modal button {
  width: 100%;
  background: var(--green);
  color: #fff;
  border: none;
  padding: 10px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.modal button:hover { background: var(--green-dark); }
.confirm-actions { display: flex; gap: 10px; }
.confirm-actions button { width: auto; flex: 1; }
.confirm-actions .confirm-cancel {
  background: var(--bg);
  color: #333;
  border: 1px solid var(--border);
}
.confirm-actions .confirm-cancel:hover { background: #eee; }
.pwd-error {
  color: #a4231d;
  font-size: 12.5px;
  margin: -4px 0 10px;
}
.pwd-error.hidden { display: none; }

.loading-spinner {
  width: 40px; height: 40px;
  border: 4px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
#loading-modal { background: rgba(30,58,95,0.85); }

.diagram-link {
  display: block;
  width: calc(100% - 16px);
  margin: 4px 8px 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
  font-size: 12.5px;
  color: #444;
  cursor: pointer;
  text-align: center;
}
.diagram-link:hover { background: var(--bg); border-color: var(--green); }

.diagram-modal {
  width: 97vw;
  height: 94vh;
  max-width: none;
  display: flex;
  flex-direction: column;
}
.diagram-container {
  overflow: auto;
  flex: 1;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px;
  margin-bottom: 14px;
  background: #fafafa;
}
.diagram-container svg {
  width: 100%;
  height: auto;
  min-width: 1100px;
}

.diagram-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.diagram-zoom {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}
.zoom-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 4px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  color: #333;
}
.zoom-btn:hover { background: var(--green-light); border-color: var(--green); }

.admin-modal {
  width: 1100px;
  max-width: 95vw;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
}
.admin-add {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-shrink: 0;
}
.admin-add input { margin-bottom: 0; }
.admin-add button { width: auto; white-space: nowrap; padding: 8px 14px; }
.admin-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-shrink: 0;
}
.admin-search-input {
  flex: 1;
  margin-bottom: 0 !important;
  width: auto !important;
}
.admin-total-count { font-size: 12.5px; color: #888; white-space: nowrap; }
.admin-users {
  flex: 1;
  min-height: 120px;
  overflow-y: auto;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.admin-users table.result-table { font-size: 12.5px; }
.admin-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 14px;
  flex-shrink: 0;
}
.admin-pagination.hidden { display: none; }
#admin-page-label { font-size: 12.5px; color: #666; }
.admin-progress-link {
  background: var(--green-light);
  color: var(--green-dark);
  border: 1px solid var(--green);
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.admin-progress-link:hover { background: var(--green); color: #fff; }
.admin-progress-detail { flex: 1; min-height: 120px; overflow-y: auto; margin-bottom: 14px; }
.admin-progress-detail.hidden { display: none; }
#admin-progress-title { font-size: 14px; margin: 10px 0 6px; word-break: break-all; }
.admin-progress-group-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #999;
  margin: 12px 0 4px;
}
.admin-progress-lesson-list { list-style: none; margin: 0; padding: 0; }
.admin-progress-lesson-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 12.5px;
  padding: 2px 0;
  color: #999;
}
.admin-progress-lesson-list li.done { color: var(--green-dark); font-weight: 600; }
.admin-progress-date {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 400;
  font-family: var(--mono);
  color: #999;
}
#admin-close-btn {
  width: auto;
  background: var(--bg);
  color: #333;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
#admin-close-btn:hover { background: #eee; }

@media (max-width: 720px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  .content { order: -1; }

  .topbar { padding-right: 24px; }
  .user-bar, .login-btn {
    position: static;
    margin-top: 10px;
    flex-wrap: wrap;
  }
}

.print-header {
  align-items: center;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--green);
}
.print-logo {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--green);
  color: #fff;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.print-header-text { display: flex; flex-direction: column; }
.print-header-text strong { font-size: 17px; color: var(--green-dark); }
.print-header-text span { font-size: 12px; color: #666; }

.print-footer {
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  color: #666;
  border-top: 1px solid #ccc;
  padding-top: 6px;
}

@media print {
  .topbar, .trial-banner, .sidebar, .toolbar, .lesson-pager,
  .modal-overlay, #ai-help, #spinner, .run-row, .editor-box,
  #user-bar, #grade-badge, #concept-complete, #ask-ai-section {
    display: none !important;
  }
  body { background: #fff; }
  .layout { display: block; min-height: 0; }
  .content { padding: 0 0 40px 0; max-width: none; }
  #lesson-body h2 { margin-top: 0; }
  .print-only { display: block; }
  .print-header { display: flex; }
  .print-footer {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
  }
  #print-query {
    display: block;
    white-space: pre-wrap;
    font-family: var(--mono);
    font-size: 13px;
    border: 1px solid #999;
    border-radius: 4px;
    padding: 10px 12px;
    margin: 10px 0;
    background: #f7f7f7;
  }
  #print-query::before {
    content: "Consulta digitada:";
    display: block;
    font-family: inherit;
    font-weight: 700;
    margin-bottom: 6px;
  }
  #print-query:empty { display: none; }
  .error:not(.hidden) { border-color: #999; background: #f2f2f2; color: #000; }
  .result { max-height: none; overflow: visible; }
  .result table { page-break-inside: auto; }
  .result tr { page-break-inside: avoid; }
  table.result-table th { position: static; }
}