/* Match DBA Lab's 1840px outer content width and shared horizontal gutters. */
.topbar {
  width: calc(100% - 48px);
  max-width: 1792px;
  margin: 12px auto 0;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

main {
  max-width: 1840px;
  padding-right: 24px;
  padding-left: 24px;
}

/* Learning assistance stays separate from the simulation and shared tokens. */
.quickstart { padding: 14px 18px; }
.quickstart summary { font-weight: 650; }
.quickstart summary .muted { margin-left: 14px; font-weight: 400; font-size: 12px; }
.quickstart-action { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; margin-top: 12px; }
.quickstart-action button { font-size: 12px; }
.quickstart-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; counter-reset: welcome; list-style: none; padding: 0; margin: 14px 0 8px; }
.quickstart-steps li { position: relative; padding-left: 32px; counter-increment: welcome; }
.quickstart-steps li::before { content: counter(welcome, decimal-leading-zero); position: absolute; left: 0; top: 0; color: var(--accent-text); font: 650 12px/1.8 var(--font-mono); }
.quickstart-steps strong, .quickstart-steps span { display: block; }
.quickstart-steps span { margin-top: 3px; font-size: 12px; color: var(--muted); }
.quickstart > .model-note { margin-bottom: 0; }
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(220px, 1fr); gap: 24px; margin-top: 10px; }
.lesson-goal { font-weight: 600; margin-top: 0; }
.lesson-steps { padding-left: 20px; margin: 8px 0 0; font-size: 12px; }
.lesson-steps li { padding: 2px 0 2px 3px; }
.lesson-steps li::marker { color: var(--accent-text); font-weight: 650; }
.lesson-observe { border-left: 1px solid var(--border); padding-left: 20px; font-size: 12px; }
.lesson-observe p { margin: 5px 0; }
.prepare-caption { margin: 14px 0 6px; font-size: 12px; font-weight: 600; }
.lab-actions { margin-top: 0; }
.lab-actions button { text-align: left; min-height: 38px; padding: 7px 12px; font-size: 12px; }
.lab-actions button small { display: block; color: var(--muted); font-size: 10px; margin-top: 3px; }
.lesson-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 12px; border-top: 1px solid var(--border); padding-top: 10px; }
.lesson-footer button { font-size: 11px; min-height: 32px; padding: 5px 9px; }
.lesson-complete { color: var(--success); font-size: 12px; flex: 1; }
#next-lab { border-color: var(--success); }
.binds .model-note { margin: 0; }
.work-status { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 12px; border-top: 1px solid var(--border); padding-top: 12px; }
#work-status { margin: 0; font-size: 12px; }
.work-status .button-group { flex-shrink: 0; }
.work-status button { font-size: 11px; min-height: 34px; padding: 5px 9px; }
.error-help { margin: -10px 0 18px; padding: 12px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-control); }
.error-help p { margin-top: 0; }
.result-reading { background: var(--surface-soft); border-left: 3px solid var(--accent); padding: 12px 14px; border-radius: 0 10px 10px 0; margin-bottom: 12px; }
.result-reading p { font-size: 12px; margin: 5px 0 0; }
.text-help { font-size: 11px; margin: 10px 6px 14px 0; }
#history-detail { margin-top: 14px; padding: 12px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.run-comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.run-comparison article { min-width: 0; background: var(--surface-soft); padding: 12px; border: 1px solid var(--border); border-radius: 12px; }
.run-comparison article > strong { display: block; margin-bottom: 8px; }
.comparison-plan { display: block; margin-top: 10px; font-size: 11px; overflow-wrap: anywhere; }
.run-comparison dl { font-size: 11px; }
.run-comparison dt { color: var(--muted); }
.run-comparison dd { margin: 1px 0 8px; font-family: var(--font-mono); overflow-wrap: anywhere; }
.comparison-sql { display: block; font-size: 11px; white-space: pre-wrap; overflow-wrap: anywhere; border-top: 1px solid var(--border); padding-top: 8px; }
.run-comparison p { overflow-wrap: anywhere; }
.tree-rows { flex-wrap: wrap; gap: 3px 7px; }
#journey-title, #result-title, #guided { scroll-margin-top: 18px; }
#help-dialog { width: min(880px, calc(100% - 32px)); max-width: none; max-height: calc(100dvh - 32px); padding: 0; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
#help-dialog::backdrop { background: #0007; }
body:has(#help-dialog[open]) { overflow: hidden; }
.help-shell { display: flex; flex-direction: column; max-height: calc(100dvh - 36px); padding: 24px; }
.help-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.help-header h2 { margin-top: 4px; }
.help-header button { flex-shrink: 0; }
#help-nav { display: flex; flex-wrap: wrap; gap: 6px; border-bottom: 1px solid var(--border); padding: 12px 0; }
#help-nav button { font-size: 12px; min-height: 36px; }
#help-nav [aria-current="page"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-text); font-weight: 650; }
#help-body { min-height: 0; overflow: auto; overscroll-behavior: contain; padding: 18px 8px 4px 2px; font-size: 13px; line-height: 1.85; }
#help-body h3 { font-size: 18px; margin: 0 0 12px; }
#help-body h4 { font-size: 13px; margin: 0 0 4px; }
.help-intro { color: var(--muted); margin-bottom: 18px; }
.handbook-entry { padding: 14px 0; border-bottom: 1px solid var(--border); }
.handbook-entry p { margin: 0; }
.handbook-steps { padding-left: 22px; }
.handbook-steps li { padding: 6px 0 6px 5px; }
.handbook-steps li::marker { font-weight: 700; color: var(--accent-text); }
.learning-path, .glossary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
.help-callout, .schema-card { padding: 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); margin: 12px 0; }
.schema-card code { overflow-wrap: anywhere; }
/* Long SQL examples must scroll inside the documentation, not widen its grid. */
.documentation #guide-content { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.documentation #guide-content > div { min-width: 0; }
@media (max-width: 1100px) {
  .work-status { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 700px) {
  .topbar {
    width: calc(100% - 24px);
    padding: 16px;
  }

  main {
    padding-right: 12px;
    padding-left: 12px;
  }

  .quickstart summary .muted { display: block; margin: 4px 0 0; }
  .quickstart-steps { grid-template-columns: 1fr; gap: 12px; }
  .lesson-layout { grid-template-columns: 1fr; gap: 12px; }
  .lesson-observe { border-left: 0; border-top: 1px solid var(--border); padding: 10px 0 0; }
  .lesson-footer { align-items: flex-start; }
  .lesson-complete { flex-basis: 100%; }
  .lab-actions { display: grid; grid-template-columns: 1fr; }
  .binds .model-note { flex-basis: 100%; }
  .work-status .button-group { flex-shrink: 1; }
  /* Compact the teaching flow so mobile readers can reach the candidates. */
  .processing #flow { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .processing .connector { display: none; }
  .processing .parse-branches, .processing .soft-bypass { grid-column: 1 / -1; }
  .processing .soft-bypass { margin: 0; }
  .flow-node { min-width: 0; }
  .run-comparison, .learning-path, .glossary { grid-template-columns: 1fr; }
  .documentation #guide-content { grid-template-columns: minmax(0, 1fr); }
  #help-dialog { width: calc(100% - 16px); max-height: calc(100dvh - 16px); border-radius: 16px; }
  .help-shell { padding: 16px; max-height: calc(100dvh - 20px); }
  .help-header { align-items: start; gap: 8px; }
  .help-header h2 { font-size: 16px; }
  #help-nav { gap: 5px; }
  #help-nav button { padding: 6px 8px; font-size: 11px; }
}