@font-face {
  font-family: "Luciole";
  src:
    local("Luciole"),
    local("Luciole-Regular"),
    url("./fonts/Luciole-Regular.woff2") format("woff2"),
    url("./fonts/Luciole-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Luciole";
  src:
    local("Luciole Bold"),
    local("Luciole-Bold"),
    url("./fonts/Luciole-Bold.woff2") format("woff2"),
    url("./fonts/Luciole-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Luciole";
  src:
    local("Luciole Italic"),
    local("Luciole-Italic"),
    url("./fonts/Luciole-Italic.woff2") format("woff2");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Luciole";
  src:
    local("Luciole Bold Italic"),
    local("Luciole-Bold-Italic"),
    url("./fonts/Luciole-Bold-Italic.woff2") format("woff2"),
    url("./fonts/Luciole-Bold-Italic.ttf") format("truetype");
  font-style: italic;
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Luciole Math";
  src:
    local("Luciole Math"),
    local("Luciole-Math"),
    url("./fonts/Luciole-Math.woff2") format("woff2"),
    url("./fonts/Luciole-Math.otf") format("opentype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Luciole Math";
  src:
    local("Luciole Math Bold"),
    local("Luciole-Math-Bold"),
    url("./fonts/Luciole-Math-Bold.otf") format("opentype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --fg: #181818;
  --panel: #f7f7f7;
  --panel-2: #fbfbfb;
  --border: #cdcdcd;
  --muted: #666;
  --accent: #0b63d1;
  --accent-bg: color-mix(in srgb, var(--accent) 12%, transparent);
  --error: #9a3412;
  --radius: 18px;
  --shadow: 0 8px 28px rgba(0,0,0,0.08);
  --status-bg: #efefef;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  height: 100%;
  font-family: "Luciole", sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-size: 18px;
  line-height: 1.55;
}

input, select, button, textarea, summary, label,
h1, h2, h3, h4, h5, p, li, div, span, a, pre, code {
  font: inherit;
  font-family: "Luciole", sans-serif;
}

@media (max-width: 980px) {
  body { font-size: 17px; }
}

.skip-nav {
  display: flex;
  gap: 0.375rem;
  align-items: center;
  margin-left: auto;
  flex-wrap: wrap;
}
.skip-link {
  padding: 0.15rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  text-decoration: none;
  font-size: 0.8rem;
  line-height: 1.4;
  opacity: 0.55;
  transition: opacity 0.15s, border-color 0.15s;
}
.skip-link:hover {
  opacity: 1;
  border-color: var(--accent);
}
.skip-link:focus-visible {
  opacity: 1;
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.app {
  max-width: 1680px;
  margin: 0 auto;
  padding: 10px 20px 72px;
}
.titlebar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.site-title {
  font-size: 1.25rem;
  font-weight: 700;
}
.site-version {
  font-weight: 700;
  color: var(--muted);
}
.subtitle {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.2;
  margin-top: 0.1rem;
}
.titlebar-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.entry-mode-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.9rem;
  padding: 0.1rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #eef4ff;
  color: #1f3f7a;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.split {
  display: grid;
  gap: 18px;
  align-items: stretch;
  grid-template-columns: minmax(320px, 1fr) minmax(320px, 1fr);
}
@media (max-width: 980px) {
  .split { grid-template-columns: 1fr; }
}

.pane {
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}
.pane > section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-width: 0;
  min-height: 32px;
}
.pane-header h2 {
  margin: 0;
  font-size: 1.14rem;
  line-height: 1.2;
}

#source {
  width: 100%;
  flex: 0 0 auto;
  height: clamp(420px, 68vh, 980px);
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-size: 1.05rem;
  line-height: 1.55;
  resize: none;
  overflow: auto;
  white-space: pre-wrap;
  caret-color: var(--fg);
  scrollbar-gutter: stable;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
button {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  border-radius: 999px;
  padding: 10px 15px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
.button-danger {
  border-color: color-mix(in srgb, var(--error) 55%, var(--border));
  color: var(--error);
}
.button-danger:hover { border-color: var(--error); }
button:focus-visible,
textarea:focus-visible,
.preview:focus-visible,
summary:focus-visible,
.skip-link:focus-visible,
pre:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.programmatic-focus-ring {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.fold {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel-2);
  overflow: hidden;
}
.fold > summary {
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 600;
  list-style: none;
}
.fold > summary::-webkit-details-marker { display: none; }
.fold-body { padding: 0 14px 14px; }
.fold-actions { padding: 0 14px 14px; }
.rules-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 1fr));
  gap: 14px;
  align-items: start;
}
.rules-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}
.rules-grid h3 { margin: 0 0 8px; font-size: 1rem; }
.rules-grid ul { margin: 0; padding-left: 1.15rem; }
.rules-grid li { margin: 0.32rem 0; }
.rules-grid .span-all { grid-column: 1 / -1; }
@media (max-width: 1100px) {
  .rules-grid {
    grid-template-columns: repeat(2, minmax(220px, 1fr));
  }
}
@media (max-width: 760px) {
  .rules-grid {
    grid-template-columns: 1fr;
  }
}

.tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.tech-grid h3 { margin: 0 0 6px; font-size: 1rem; }
pre {
  margin: 0;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  min-height: 6rem;
  max-height: 18rem;
  overflow: auto;
}

.preview {
  flex: 0 0 auto;
  height: clamp(420px, 68vh, 980px);
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
  overflow-y: auto;
  overflow-x: hidden;
  cursor: text;
  user-select: text;
  outline: none;
  caret-color: var(--fg);
  scrollbar-gutter: stable;
}
.preview:focus { box-shadow: 0 0 0 3px var(--accent-bg); }

/* ── Math ─────────────────────────────────────────────────────────────────── */
.preview math {
  font-family: "Luciole Math", "Luciole", serif;
  font-size: 1.15em;
  math-style: normal;    /* Low Vision: verhindert mfrac-Tiefenskalierung in Inline-Kontext */
}
.preview math[display="block"] {
  display: block;
  overflow: visible;
  padding: 0.25rem 0;
  text-align: left;
  margin: 0;
}
.preview .display-math {
  margin: 0.9rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.3rem 0;
  text-align: left;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}
.preview .display-math > * {
  display: inline-block;
  min-width: max-content;
  max-width: none;
  margin-left: 0 !important;
  margin-right: 0 !important;
}
.preview .display-math .tml-display,
.preview .display-math .temml-display,
.preview .display-math math[display="block"],
.preview .tml-display,
.preview .temml-display {
  display: block !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
  text-align: left !important;
  justify-content: flex-start !important;
}

/* ── Vertikaler Rhythmus ───────────────────────────────────────────────────── */
.preview > :first-child { margin-top: 0; }
.preview p,
.preview ul,
.preview ol,
.preview pre,
.preview blockquote,
.preview table {
  margin: 0 0 1.1rem;
}

/* ── Überschriften ─────────────────────────────────────────────────────────── */
.preview h1,
.preview h2,
.preview h3,
.preview h4 {
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.55rem;
}
.preview h1 { font-size: 1.29em; }
.preview h2 { font-size: 1.14em; }
.preview h3 { font-size: 1.0em; }
.preview h4 { font-size: 1.0em; margin-top: 1.5rem; }

.preview h1::before { content: ">>> "; color: var(--accent); font-weight: 400; }
.preview h2::before { content: ">> "; color: var(--accent); font-weight: 400; }
.preview h3::before { content: "> "; color: var(--accent); font-weight: 400; }
.preview h4::before { content: "- "; color: var(--accent); font-weight: 400; }

/* ── Listen ────────────────────────────────────────────────────────────────── */
.preview ul,
.preview ol { padding-left: 1.6rem; }
.preview li { margin: 0.18rem 0; }
.preview ul ul,
.preview ul ol,
.preview ol ul,
.preview ol ol { margin: 0.15rem 0; }

/* ── Inline-Code ───────────────────────────────────────────────────────────── */
.preview code {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.06rem 0.32rem;
  background: var(--panel);
  font-size: 0.97em;
}

/* ── Pre-Blöcke ────────────────────────────────────────────────────────────── */
.preview pre {
  padding: 14px 16px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.97em;
  line-height: 1.6;
}

/* ── Blockquotes ───────────────────────────────────────────────────────────── */
.preview blockquote {
  border-left: 5px solid var(--accent);
  padding: 0.45rem 0.75rem 0.45rem 1rem;
  margin: 0 0 1.1rem;
  color: var(--fg);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg));
  border-radius: 0 8px 8px 0;
}

/* ── Tabellen ──────────────────────────────────────────────────────────────── */
.preview table { border-collapse: collapse; width: 100%; }
.preview th,
.preview td {
  border: 1.5px solid var(--border);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
}
.preview th {
  font-weight: 700;
  background: var(--panel);
}

/* ── Links ─────────────────────────────────────────────────────────────────── */
.preview a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
}
.preview a:hover { border-bottom-color: var(--accent); }
.preview a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ── Render-Fehler & Leerstand ─────────────────────────────────────────────── */
.preview .render-error {
  color: var(--error);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  border-radius: 12px;
  padding: 12px 14px;
  margin: 1rem 0;
  display: inline-block;
}
.preview .empty { color: var(--muted); }

body.output-maximized { overflow: hidden; }
body.output-maximized .titlebar,
body.output-maximized .statusbar {
  display: none;
}
body.output-maximized .pane-input { display: none; }
body.output-maximized .split { grid-template-columns: 1fr; }
body.output-maximized .pane-output {
  position: fixed;
  inset: 16px;
  z-index: 20;
  margin: 0;
  background: var(--panel);
}
body.output-maximized .pane-output .preview,
body.output-maximized .pane-output #source {
  height: calc(100vh - 210px);
  max-height: none;
}

body.fullscreen-view {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

body.fullscreen-view #content.preview {
  height: auto;
  max-height: none;
  overflow: visible;
  border-radius: 0;
  padding: 0;
  background: transparent;
  border: none;
  scrollbar-gutter: auto;
}

body.fullscreen-view .export-credit {
  margin-top: 2.5rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  font-size: 0.8em;
  color: var(--muted);
}

.statusbar {
  margin: 0 0 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 2px 0 10px;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
}
[aria-busy="true"] {
  cursor: progress;
}
#status[data-kind="warn"] { color: var(--error); }
#statusMeta {
  color: var(--muted);
  font-size: 0.9rem;
  opacity: 0.9;
}

body.modal-open {
  overflow: hidden;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.42);
  box-sizing: border-box;
}
.overlay[hidden] {
  display: none;
}
.overlay-panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 0;
  background: var(--panel);
  color: var(--fg);
  width: min(1120px, calc(100vw - 24px));
  max-height: calc(100vh - 32px);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.overlay-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}
.overlay-header h3 {
  margin: 0;
  font-size: 1.08rem;
}
.overlay-body {
  padding: 16px;
  overflow-y: auto;
  overscroll-behavior: contain;
  flex: 1 1 auto;
  min-height: 0;
}
.button-row-right {
  justify-content: flex-end;
}

.connection-panel {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel-2);
  padding: 12px 14px;
  display: grid;
  gap: 12px;
  flex: 1 1 auto;
  align-content: start;
}
.connection-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  flex-wrap: wrap;
}
.connection-header h2 {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
}
.connection-grid {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(180px, 1fr) auto;
  gap: 12px;
  align-items: end;
}
.connection-field {
  display: grid;
  gap: 6px;
  min-width: 0;
}
.connection-field span {
  font-weight: 600;
}
.connection-field input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--fg);
  background: var(--bg);
}
.connection-actions {
  display: flex;
  align-items: end;
  gap: 10px;
}
.board-tools {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel-2);
  padding: 12px 14px;
  display: grid;
  gap: 12px;
}
.board-tools-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  flex-wrap: wrap;
}
.board-tools-title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
}
.board-tools-groups {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.board-tool-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1 1 180px;
  min-width: 0;
}
.board-tool-group-title {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.board-tool-group input[type="text"] {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--fg);
  background: var(--bg);
}
.board-tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.snapshot-list {
  display: grid;
  gap: 10px;
}
.snapshot-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel-2);
  padding: 12px;
  display: grid;
  gap: 10px;
}
.snapshot-item-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  flex-wrap: wrap;
}
.snapshot-item-title {
  font-weight: 700;
}
.snapshot-item-meta {
  color: var(--muted);
  font-size: 0.92rem;
}
.snapshot-empty {
  color: var(--muted);
}
/* ── Teacher-Presence-Panel ──────────────────────────────────────────────── */
body:not([data-entry-role="teacher"]) #teacherPresencePanel { display: none; }

.teacher-presence-panel {
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.teacher-presence-heading {
  margin: 0 0 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.teacher-presence-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.teacher-presence-item {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 0.88rem;
  color: var(--fg);
  cursor: default;
  user-select: none;
}
.teacher-presence-item[role="button"] {
  cursor: pointer;
}
.teacher-presence-item[role="button"]:hover,
.teacher-presence-item[role="button"]:focus {
  background: var(--panel-hover, #e0e0e0);
  border-color: var(--accent, #4a90d9);
  outline: none;
}
.teacher-presence-item--granted,
.teacher-presence-item[aria-pressed="true"] {
  background: var(--accent, #4a90d9);
  color: #fff;
  border-color: var(--accent, #4a90d9);
}
.teacher-presence-empty {
  font-size: 0.88rem;
  color: var(--muted);
  font-style: italic;
  margin: 0;
}

@media (max-width: 900px) {
  .connection-grid {
    grid-template-columns: 1fr;
  }
  .connection-actions {
    align-items: stretch;
  }
}

.solve-overlay .overlay-panel {
  width: min(1180px, calc(100vw - 24px));
}
.solve-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}
.solve-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  min-height: 0;
}
.solve-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel-2);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  min-height: 0;
}
.solve-card--grow {
  flex: 1 1 auto;
}
.solve-textarea,
.solve-context-textarea {
  width: 100%;
  min-height: 0;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--fg);
  background: var(--bg);
  box-sizing: border-box;
  overflow: auto;
}
.solve-textarea {
  min-height: clamp(180px, 28vh, 280px);
}
.solve-context-textarea {
  min-height: 112px;
  max-height: 28vh;
}
.solve-mode-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px 12px;
  margin: 0;
  align-items: center;
}
.solve-mode-group label,
.solve-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}
.solve-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-start;
}
.modal-help {
  color: var(--muted);
  font-size: 0.96rem;
}

.solve-prompt-fold {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-2);
  overflow: hidden;
}
.solve-prompt-fold > summary {
  cursor: pointer;
  padding: 10px 12px;
  font-weight: 600;
  list-style: none;
}
.solve-prompt-fold > summary::-webkit-details-marker { display: none; }
.solve-prompt-body { padding: 0 12px 12px; }
.solve-result {
  flex: 1 1 auto;
  min-height: clamp(380px, 56vh, 760px);
  max-height: none;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  padding: 12px 14px;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}
.solve-result:empty::before {
  content: 'Noch keine Antwort.';
  color: var(--muted);
}
@media (max-width: 980px) {
  .solve-workspace {
    grid-template-columns: 1fr;
  }
  .overlay {
    padding: 8px;
  }
  .overlay-panel {
    width: calc(100vw - 16px);
    max-height: calc(100vh - 16px);
  }
}

/* ── Umschalter Persönlich / Gemeinsam ───────────────────────────────────── */
.board-context-switch {
  display: flex;
  gap: 0;
  flex-shrink: 0;
}
.board-context-switch button {
  padding: 4px 12px;
  font-size: 0.85rem;
  border-radius: 0;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  min-height: 32px;
}
.board-context-switch button:first-child {
  border-radius: 999px 0 0 999px;
}
.board-context-switch button:last-child {
  border-radius: 0 999px 999px 0;
  border-left: none;
}
.board-context-switch button[aria-pressed="true"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.board-context-switch button[aria-pressed="true"]:last-child {
  border-left-color: var(--accent);
}
.board-context-switch button:hover:not([aria-pressed="true"]):not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}
.board-context-switch button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  z-index: 1;
  position: relative;
}
.board-context-switch button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Zweispalten-Layout für Personal-Boards-Tab ───────────────────────────── */
.personal-boards-layout {
  display: contents; /* transparent by default — children flow normally */
}
.personal-boards-main {
  display: contents;
}
body.personal-boards-mode .personal-boards-layout {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
body.personal-boards-mode .personal-boards-main {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1 1 0;
  min-width: 0;
}
body.personal-boards-mode #personalBoardsPanel {
  display: flex !important;
  flex-direction: column;
  gap: 10px;
  width: 280px;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
  position: sticky;
  top: 16px;
  max-height: calc(100dvh - 80px);
  overflow-y: auto;
  overflow-x: hidden;
}
body.personal-boards-mode .board-context-switch { display: none !important; }
body.personal-boards-mode #personalBoardsSelectedHeader { display: block !important; }
body.personal-boards-mode .pane-input .button-row { display: none !important; }
body.personal-boards-mode .connection-panel { display: none !important; }
body.personal-boards-mode .pane-output .button-row { display: none !important; }
body.personal-boards-mode #boardToolsSection { display: none !important; }
body.personal-boards-mode #technikFold { display: none !important; }

@media (max-width: 980px) {
  body.personal-boards-mode .personal-boards-layout {
    flex-direction: column;
  }
  body.personal-boards-mode #personalBoardsPanel {
    width: 100%;
    position: static;
    max-height: 280px;
  }
}

/* ── Persönliche-Boards-Panel-Inhalt ─────────────────────────────────────── */
#personalBoardsPanel {
  display: none;
}
.personal-boards-selected-header {
  display: none;
  font-size: 0.92rem;
  color: var(--muted);
  padding: 2px 0 6px;
}
.personal-boards-selected-header strong {
  color: var(--fg);
}
.personal-boards-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.personal-boards-header h2 {
  margin: 0;
  font-size: 1.05rem;
}
.personal-boards-status {
  color: var(--muted);
  font-size: 0.85rem;
}
.personal-boards-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.personal-boards-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-2);
  padding: 8px 12px;
  flex-wrap: wrap;
}
.personal-boards-item--selected {
  border-color: var(--accent);
  background: var(--accent-bg);
}
.personal-boards-item-name {
  flex: 1;
  font-weight: 700;
  min-width: 0;
  font-size: 0.92rem;
}
.personal-boards-item-live {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  flex-shrink: 0;
}
.personal-boards-show-btn {
  font-size: 0.82rem;
  padding: 4px 10px;
  flex-shrink: 0;
}
.personal-boards-empty {
  color: var(--muted);
  font-style: italic;
  font-size: 0.88rem;
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Teacher-Board-Verwaltungs-Panel ─────────────────────────────────────── */
#teacherBoardsPanel {
  display: none;
}
body.teacher-boards-mode #teacherBoardsPanel {
  display: block !important;
  padding: 24px;
  max-width: 960px;
  margin: 0 auto;
}
body.teacher-boards-mode .personal-boards-layout {
  display: none !important;
}
.teacher-boards-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}
.teacher-boards-header h2 {
  margin: 0;
  font-size: 1.3rem;
}
.teacher-boards-back-link {
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
}
.teacher-boards-back-link:hover { text-decoration: underline; }
.teacher-boards-status {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 12px;
  min-height: 1.2em;
}
.teacher-boards-create-form {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.teacher-boards-create-label {
  font-size: 0.85rem;
  color: var(--muted);
}
.teacher-boards-create-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.teacher-boards-create-row input {
  flex: 1;
  min-width: 180px;
  max-width: 360px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 10px;
  font-size: 0.9375rem;
}
.teacher-boards-list {
  overflow-x: auto;
}
.teacher-boards-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.teacher-boards-table thead tr {
  border-bottom: 2px solid var(--border);
}
.teacher-boards-table th {
  text-align: left;
  padding: 6px 10px;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}
.teacher-boards-table th.teacher-boards-col-num,
.teacher-boards-table td.teacher-boards-col-num {
  text-align: right;
}
.teacher-boards-row {
  border-bottom: 1px solid var(--border);
}
.teacher-boards-row:last-child {
  border-bottom: none;
}
.teacher-boards-row td {
  padding: 8px 10px;
  vertical-align: middle;
}
.teacher-boards-col-name {
  font-weight: 700;
  min-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 220px;
}
.teacher-boards-col-num {
  white-space: nowrap;
  color: var(--muted);
  min-width: 60px;
}
.teacher-boards-col-date {
  white-space: nowrap;
  color: var(--muted);
  min-width: 100px;
}
.teacher-boards-col-actions {
  white-space: nowrap;
  min-width: 200px;
}
.teacher-boards-col-actions {
  display: flex;
  gap: 6px;
  flex-wrap: nowrap;
  align-items: center;
}
/* Legacy card styles kept for potential reuse */
.teacher-boards-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel-2);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.teacher-boards-item-name {
  font-weight: 700;
  font-size: 1rem;
  flex: 1;
  min-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.teacher-boards-item-meta {
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}
.teacher-boards-item-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
  flex-shrink: 0;
}
.teacher-boards-empty {
  color: var(--muted);
  font-style: italic;
  font-size: 0.9rem;
}
.personal-boards-item-meta {
  color: var(--muted);
  font-size: 0.82rem;
}

/* ── Student-Board-Verbindung: kompaktes Layout ──────────────────────────── */
body[data-entry-role="student"] .connection-panel {
  flex: 0 0 auto;
  gap: 10px;
}

body[data-entry-role="student"] .connection-grid {
  grid-template-columns:
    minmax(110px, 0.75fr)
    minmax(150px, 1fr)
    minmax(150px, 1fr)
    max-content;
  align-items: end;
}

body[data-entry-role="student"] .connection-actions {
  flex-wrap: nowrap;
  align-items: end;
}

@media (max-width: 1180px) {
  body[data-entry-role="student"] .connection-grid {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
  }

  body[data-entry-role="student"] .connection-actions {
    grid-column: 1 / -1;
  }
}

/* ── Teacher-Kartenhöhe angleichen ───────────────────────────────────────── */
.connection-panel,
.board-tools {
  box-sizing: border-box;
}

body[data-entry-role="teacher"] {
  --teacher-control-card-min-height: 210px;
}

body[data-entry-role="teacher"] .connection-panel,
body[data-entry-role="teacher"] .board-tools {
  min-height: var(--teacher-control-card-min-height, 196px);
}