@media (max-width: 760px) {
  :root {
    --spur-width-collapsed: 0px;
    --spur-width-expanded: min(82vw, 290px);
  }

  .app-shell {
    display: block;
  }

  .chapter-spur {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--spur-width-expanded);
    min-width: var(--spur-width-expanded);
    height: 100vh;
    transform: translateX(-100%);
    box-shadow: none;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
  }

  .app-shell.spur-mobile-open .chapter-spur {
    transform: translateX(0);
    box-shadow: 0 12px 40px rgba(26, 26, 46, 0.16);
  }

  .chapter-spur-backdrop {
    position: fixed;
    inset: 0;
    z-index: 24;
    border: 0;
    background: rgba(16, 18, 27, 0.18);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease;
  }

  .app-shell.spur-mobile-open .chapter-spur-backdrop {
    display: block;
    opacity: 1;
    pointer-events: auto;
  }

  .topbar {
    padding: 0 10px;
  }

  .breadcrumb {
    font-size: 0.78rem;
  }

  .icon-button {
    width: 32px;
    height: 32px;
  }

  .chapter-toggle {
    width: 32px;
    min-width: 32px;
    height: 32px;
    margin-top: 12px;
    margin-bottom: 8px;
    padding: 0;
  }

  .main-content {
    padding: 0;
  }

  .content-region {
    padding: 28px 18px calc(108px + env(safe-area-inset-bottom));
  }

  .content-region.content-region--home {
    padding-top: 18px;
  }

  h1 {
    font-size: 1.75rem;
  }

  .slide-nav {
    gap: 8px;
    padding: 11px 14px calc(12px + env(safe-area-inset-bottom));
  }

  .slide-nav > button[data-dir] {
    min-width: 74px;
    min-height: 40px;
    padding: 9px 10px;
  }

  .slide-dot {
    min-width: 8px;
    padding: 0;
  }

  .hub-grid,
  .chapter-grid {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .tax-hub-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
    white-space: normal;
  }

  .est-compass {
    margin-bottom: 20px;
  }

  .est-compass-summary {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .est-compass-detail {
    padding: 0 16px 16px;
  }

  .understanding-teaser {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

   .tax-hub-quiz-teaser,
   .quiz-resume-card,
   .quiz-abort-confirm,
   .quiz-complete-confirm {
     align-items: flex-start;
     flex-direction: column;
    }

  .understanding-teaser-action {
    width: 100%;
    text-align: center;
  }

  .understanding-hero {
    padding: 18px;
  }

  .understanding-path,
  .est-compass-grid,
  .chapter-orientation {
    grid-template-columns: 1fr;
  }

  .understanding-step,
  .understanding-office-step {
    grid-template-columns: 1fr;
  }

  .understanding-step-mark,
  .understanding-office-step span {
    width: 30px;
    height: 30px;
  }

  .understanding-number-row {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .understanding-section {
    margin: 28px 0;
  }

  .est-compass-grid,
  .chapter-orientation {
    grid-template-columns: 1fr;
  }

  .chapter-orientation {
    margin-top: -22px;
  }

  .card-head,
  .slide-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .quiz-config-layout,
  .quiz-result-grid {
    grid-template-columns: 1fr;
  }

  .quiz-segment-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quiz-segment-group--compact {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .quiz-config-sidebar {
    position: static;
  }

  #quiz-selection-summary {
    display: none;
  }

  .quiz-card--mobile-start {
    display: block;
    padding-bottom: calc(18px + env(safe-area-inset-bottom));
  }

  .quiz-card,
  .quiz-question-card,
  .quiz-resume-card,
  .quiz-abort-confirm,
  .quiz-complete-confirm,
  .quiz-last-result,
  .quiz-hero {
    padding: 18px;
  }

  .quiz-question-card {
    padding: 18px;
  }

  .quiz-card--snapshot {
    align-items: flex-start;
    flex-direction: column;
  }

  .quiz-snapshot-nav {
    width: 100%;
    grid-template-columns: 1fr;
    margin-left: 0;
  }

  .quiz-nav-button,
  .quiz-nav-abort {
    width: 100%;
    justify-self: stretch;
    text-align: center;
  }

  .choice-footer-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .choice-actions {
    width: 100%;
    justify-content: stretch;
  }

  .choice-actions .secondary-action {
    width: 100%;
    text-align: center;
  }

  .training-mode-grid {
    grid-template-columns: 1fr;
  }

  .training-mode-card {
    min-height: 0;
  }

  .training-checklist-summary {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .training-checklist-summary-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .training-checklist-summary-action {
    justify-self: stretch;
    text-align: center;
  }

  .written-case {
    grid-template-columns: 1fr;
  }

  .written-case-actions {
    justify-items: stretch;
  }

  .written-status-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .written-open,
  .written-reset {
    width: 100%;
    text-align: center;
  }

  .quiz-actions,
  .quiz-inline-actions,
  .quiz-rating-group {
    flex-direction: column;
  }

  .quiz-actions .understanding-teaser-action,
  .quiz-actions .secondary-action,
  .quiz-inline-actions .secondary-action,
  .quiz-rating-group .secondary-action,
  .quiz-complete-confirm .understanding-teaser-action {
    width: 100%;
    text-align: center;
  }

  .quiz-tax-group {
    padding: 14px;
  }

  .quiz-tax-header {
    grid-template-columns: minmax(0, 1fr) 74px 104px;
    gap: 10px;
  }

  .quiz-tax-toggle,
  .quiz-tax-header .secondary-action {
    width: auto;
    text-align: center;
  }

  .quiz-tax-status {
    padding-left: 30px;
  }

  .quiz-choice-chip,
  .quiz-breakdown-row,
  .quiz-problem-item {
    padding: 14px;
  }

  .quiz-summary-row {
    grid-template-columns: minmax(0, 1fr) minmax(78px, auto);
    gap: 10px;
  }

  .quiz-summary-row strong {
    min-width: 78px;
  }

  .slide-learning-label {
    margin-top: 0;
  }

  .learning-card-grid {
    grid-template-columns: 1fr;
  }

  .content-block.ai-help {
    padding: 16px 18px;
  }

  .ai-help-disclaimer {
    font-size: 0.72rem;
  }

  .ai-help-list {
    padding-left: 18px;
  }

  .law-explorer-panel {
    width: 100vw !important;
    max-width: 100vw;
  }

  body.law-explorer-open {
    overflow: hidden;
  }

  .law-explorer-resize-handle {
    display: none;
  }

  .law-explorer-header {
    padding: 12px 14px 10px;
  }

  .law-explorer-body {
    padding: 14px;
  }

  .law-explorer-scroll .law-text-line {
    padding: 12px 14px;
    font-size: 0.88rem;
  }

  /* Strukturierte Gesetzestext-Blöcke auf Mobile: Einrückungen und
     Markerbreiten reduzieren, damit der Text nicht zu schmal wird und
     kein horizontaler Scroll entsteht. Ab Tiefe 3 wird die Einrückung
     nicht weiter vergrößert. */
  .law-blocks {
    padding: 12px 12px;
    gap: 5px;
  }

  .law-block--absatz { --law-marker-w: 2.25rem; }
  .law-block--ziffer { --law-marker-w: 1.85rem; }
  .law-block--litera { --law-marker-w: 1.6rem; }
  .law-block--subitem { --law-marker-w: 1.2rem; }

  .law-block-text {
    font-size: 0.88rem;
    line-height: 1.7;
  }

  .law-block--depth-3,
  .law-block--depth-4,
  .law-block--depth-5,
  .law-block--depth-6 {
    --law-marker-w: 1.1rem;
  }

  .law-block--depth-3 .law-block-children,
  .law-block--depth-4 .law-block-children,
  .law-block--depth-5 .law-block-children {
    padding-left: 0;
  }

  .choice-option-status {
    display: none;
  }

  .choice-result-score {
    font-size: 0.82rem;
  }

  .quiz-snapshot-nav {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .quiz-snapshot-nav .quiz-nav-button,
  .quiz-snapshot-nav .quiz-nav-abort {
    grid-column: 1;
    justify-self: stretch;
    min-height: 44px;
    text-align: center;
  }

  .kodex-rules {
    grid-template-columns: 1fr;
  }

  .kodex-rule-column {
    padding-top: 14px;
    padding-left: 0;
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .kodex-register-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kodex-section-heading {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
  }

  .kodex-priority-summary {
    min-width: 0;
  }

  .kodex-outside-list {
    grid-template-columns: 1fr;
  }

  .kodex-search {
    grid-template-columns: 1fr;
    gap: 5px;
    max-width: none;
  }

  .kodex-table-scroll {
    overflow: visible;
    border: 0;
    background: transparent;
  }

  .kodex-table {
    display: block;
    min-width: 0;
  }

  .kodex-table thead {
    display: none;
  }

  .kodex-table tbody {
    display: grid;
    gap: 10px;
  }

  .kodex-table tr {
    display: grid;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
  }

  .kodex-table td,
  .kodex-table td:nth-child(1),
  .kodex-table td:nth-child(2),
  .kodex-table td:nth-child(4),
  .kodex-table td:nth-child(5),
  .kodex-table td:nth-child(6) {
    display: grid;
    grid-template-columns: minmax(104px, 0.42fr) minmax(0, 1fr);
    gap: 10px;
    width: auto;
    padding: 9px 11px;
    text-align: left;
  }

  .kodex-table td::before {
    content: attr(data-label);
    color: var(--text-muted);
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
  }

  .kodex-table tr:last-child td:not(:last-child) {
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 430px) {
  .kodex-register-grid,
  .kodex-priority-summary {
    grid-template-columns: 1fr;
  }
}

@media print {
  .topbar,
  .chapter-spur,
  .slide-nav-host {
    display: none;
  }

  .app-shell,
  .main-shell {
    display: block;
    height: auto;
  }

  .main-content {
    overflow: visible;
    padding: 0;
  }

  .slide {
    display: block;
    break-inside: avoid;
  }

  .learning-help-section p,
  .learning-help-example-part {
    max-width: 100%;
  }

  .learning-help-shell .expand-toggle {
    font-size: 0.74rem;
    padding: 6px 10px;
  }

  .law-blocks,
  .law-block-text {
    max-width: 100%;
  }

  .law-block--note {
    break-inside: avoid;
  }

  .law-block.law-target-highlight,
  .law-explorer-scroll .law-text-line.law-target-highlight,
  .law-explorer-scroll .law-text-line.law-abs-highlight {
    background: transparent;
    box-shadow: none;
  }
}