:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --surface-hover: #f0f4f8;
  --text: #18212f;
  --muted: #687386;
  --border: #dce3ec;
  --border-strong: #c7d1dd;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eaf1ff;
  --success: #16845b;
  --warning: #a16207;
  --danger: #c2413b;
  --shadow: 0 18px 50px rgba(27, 39, 64, 0.16);
  --radius: 12px;
  --topbar-height: 66px;
  font-family: "Nunito", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; overflow: hidden; background: var(--bg); }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: .92em; }

.is-hidden { display: none !important; }
.muted { color: var(--muted); }

.app { height: 100%; }
.app.is-loading { visibility: hidden; }

.topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 20;
}

.brand, .topbar-actions { display: flex; align-items: center; gap: 11px; min-width: 0; }
.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}
.brand-mark img {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
}
.brand-title { font-weight: 800; letter-spacing: -.015em; }
.brand-subtitle { color: var(--muted); font-size: 12px; max-width: 48vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.workspace {
  height: calc(100vh - var(--topbar-height));
  display: grid;
  grid-template-columns: 286px minmax(0, 1fr) 245px;
  min-width: 0;
}

.panel {
  min-width: 0;
  background: var(--surface-soft);
  overflow: auto;
}
.tree-panel { border-right: 1px solid var(--border); padding: 16px 12px 22px; }
.outline-panel { border-left: 1px solid var(--border); padding: 16px 16px 22px; }
.panel-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 13px; }
.panel-header h2 { margin: 0; font-size: 15px; }
.panel-header p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }

.create-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.search-box {
  height: 38px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
  color: var(--muted);
  margin-bottom: 12px;
}
.search-box:focus-within { border-color: #8db0fa; box-shadow: 0 0 0 3px rgba(37,99,235,.09); }
.search-box input { min-width: 0; width: 100%; border: 0; outline: 0; background: transparent; color: var(--text); }

.primary-button, .secondary-button, .icon-button {
  border: 0;
  border-radius: 9px;
  cursor: pointer;
  transition: background .16s ease, border-color .16s ease, transform .16s ease, opacity .16s ease;
}
.primary-button:disabled, .secondary-button:disabled, .icon-button:disabled { cursor: not-allowed; opacity: .45; }
.primary-button { background: var(--primary); color: white; font-weight: 700; padding: 9px 14px; }
.primary-button:hover:not(:disabled) { background: var(--primary-hover); }
.secondary-button { background: var(--surface); border: 1px solid var(--border); padding: 8px 11px; font-weight: 650; }
.secondary-button:hover:not(:disabled) { background: var(--surface-hover); border-color: var(--border-strong); }
.icon-button { width: 36px; height: 36px; display: grid; place-items: center; background: transparent; font-size: 18px; }
.icon-button:hover:not(:disabled) { background: var(--surface-hover); }
.full-width { width: 100%; min-height: 43px; }
.is-spinning { animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.save-state { font-size: 12px; color: var(--muted); white-space: nowrap; }
.save-state[data-status="dirty"] { color: var(--warning); }
.save-state[data-status="error"] { color: var(--danger); }
.save-state[data-status="saved"] { color: var(--success); }

.tree { padding-bottom: 30px; }
.tree-row {
  width: 100%;
  min-height: 37px;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
  padding: 5px 7px 5px calc(8px + var(--depth, 0) * 15px);
  border: 0;
  border-radius: 8px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.tree-row:hover { background: var(--surface-hover); }
.tree-row.is-selected { background: var(--primary-soft); color: #174dad; }
.tree-icon { color: var(--muted); text-align: center; font-size: 13px; }
.tree-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; font-weight: 600; }
.tree-meta { color: var(--muted); font-size: 9px; letter-spacing: .04em; text-transform: uppercase; }
.tree-meta.is-draft { color: var(--warning); }
.tree-empty { padding: 14px 8px; font-size: 13px; }

.editor-panel { min-width: 0; overflow: auto; background: var(--surface); }
.editor-shell { min-height: 100%; padding: 18px 18px 32px; }
.document-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 14px; }
.document-heading h1 { margin: 2px 0 0; font-size: clamp(24px, 2.7vw, 38px); letter-spacing: -.035em; overflow-wrap: anywhere; }
.eyebrow { margin: 0; color: var(--primary); font-size: 11px; text-transform: uppercase; letter-spacing: .09em; font-weight: 800; }
.document-badges { display: flex; gap: 6px; }
.badge { display: inline-flex; align-items: center; border-radius: 999px; background: var(--primary-soft); color: #2352a2; padding: 5px 9px; font-size: 10px; font-weight: 800; letter-spacing: .03em; text-transform: uppercase; }
.badge-muted { background: #eef1f5; color: var(--muted); }
.badge-warning { background: #fff5d9; color: var(--warning); }

.empty-state { height: 100%; min-height: 500px; display: grid; align-content: center; justify-items: center; text-align: center; padding: 36px; }
.empty-state h1 { margin: 14px 0 5px; }
.empty-state p { margin: 0; color: var(--muted); }
.empty-icon { width: 68px; height: 68px; display: grid; place-items: center; border-radius: 20px; background: var(--primary-soft); color: var(--primary); font-size: 29px; }

.notice { border: 1px solid var(--border); border-left-width: 4px; border-radius: 9px; padding: 11px 13px; margin: 0 0 12px; font-size: 13px; line-height: 1.45; }
.notice.warning { background: #fffaf0; border-left-color: #e0a31a; }

#editor { border-radius: 11px; overflow: hidden; }
.simple-editor { border: 1px solid var(--border); border-radius: 11px; overflow: hidden; background: var(--surface); }
.simple-editor-toolbar { min-height: 48px; display: flex; align-items: center; flex-wrap: wrap; gap: 4px; padding: 7px 9px; background: var(--surface-soft); border-bottom: 1px solid var(--border); }
.simple-editor-toolbar.is-disabled { opacity: .48; }
.simple-editor-toolbar button, .simple-editor-toolbar select, .simple-editor-toolbar input { height: 32px; border: 1px solid transparent; border-radius: 6px; background: transparent; color: var(--text); padding: 0 8px; font-size: 12px; }
.simple-editor-toolbar button, .simple-editor-toolbar select { cursor: pointer; }
.simple-editor-toolbar button:hover:not(:disabled), .simple-editor-toolbar select:hover:not(:disabled), .simple-editor-toolbar input:hover:not(:disabled) { background: var(--surface-hover); border-color: var(--border); }
.simple-editor-toolbar select { border-color: var(--border); background: var(--surface); min-width: 124px; }
.simple-editor-callout-controls {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}
.simple-editor-toolbar .simple-editor-callout-type {
  min-width: 96px;
  border-color: transparent;
}
.simple-editor-toolbar .simple-editor-callout-title {
  width: 116px;
  border-color: var(--border);
  background: var(--surface-soft);
  cursor: text;
}
.simple-editor-toolbar .simple-editor-callout-controls button {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
}
.simple-editor-image-controls {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}
.simple-editor-toolbar .simple-editor-image-controls > button {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
}
.simple-editor-image-width-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}
.simple-editor-toolbar .simple-editor-image-width {
  width: 62px;
  min-width: 62px;
  padding: 0 5px;
  border-color: var(--border);
  background: var(--surface-soft);
  text-align: right;
}
.simple-editor-toolbar .simple-editor-image-width:disabled {
  opacity: .55;
  cursor: not-allowed;
}
.toolbar-separator { width: 1px; height: 24px; background: var(--border); margin: 0 3px; }
.toolbar-spacer { flex: 1; }
.simple-editor-body { height: calc(100vh - 252px); min-height: 520px; overflow: hidden; }
.simple-editor-visual, .simple-editor-markdown { width: 100%; height: 100%; overflow: auto; border: 0; outline: 0; background: var(--surface); color: var(--text); }
.simple-editor-visual { padding: 28px clamp(22px, 5vw, 72px); font-size: 16px; line-height: 1.72; }
.simple-editor-visual:empty::before { content: 'Hier schreiben …'; color: var(--muted); }
.simple-editor-visual h1, .simple-editor-visual h2, .simple-editor-visual h3, .simple-editor-visual h4 { line-height: 1.25; letter-spacing: -.02em; margin: 1.35em 0 .55em; }
.simple-editor-visual h1:first-child, .simple-editor-visual h2:first-child { margin-top: 0; }
.simple-editor-visual p { margin: 0 0 1em; }
.simple-editor-visual blockquote { margin: 1.2em 0; padding: .25em 1em; border-left: 4px solid var(--primary); background: var(--surface-soft); color: var(--muted); }

.simple-editor-visual .md-admonition {
  --admonition-accent: #2563eb;
  --admonition-bg: rgba(37, 99, 235, .08);
  margin: 1.3em 0;
  padding: 14px 16px 12px;
  border: 1px solid var(--admonition-accent);
  border-left-width: 5px;
  border-radius: 9px;
  background: var(--admonition-bg);
}
.simple-editor-visual .md-admonition-title {
  margin: 0 0 8px;
  font-weight: 800;
  line-height: 1.35;
}
.simple-editor-visual .md-admonition-title::before {
  content: attr(data-label);
}
.simple-editor-visual .md-admonition-content > :last-child { margin-bottom: 0; }
.simple-editor-visual .md-admonition-note { --admonition-accent: #64748b; --admonition-bg: rgba(100, 116, 139, .09); }
.simple-editor-visual .md-admonition-tip { --admonition-accent: #16845b; --admonition-bg: rgba(22, 132, 91, .09); }
.simple-editor-visual .md-admonition-info { --admonition-accent: #2563eb; --admonition-bg: rgba(37, 99, 235, .08); }
.simple-editor-visual .md-admonition-warning { --admonition-accent: #a16207; --admonition-bg: rgba(161, 98, 7, .10); }
.simple-editor-visual .md-admonition-danger { --admonition-accent: #c2413b; --admonition-bg: rgba(194, 65, 59, .09); }
.simple-editor-visual pre { overflow: auto; padding: 15px; border-radius: 8px; background: #111827; color: #e5e7eb; }
.simple-editor-visual code { font-family: "SFMono-Regular", Consolas, monospace; background: var(--surface-hover); padding: .12em .35em; border-radius: 4px; }
.simple-editor-visual pre code { background: transparent; padding: 0; }
.simple-editor-visual img {
  max-width: 100%;
  height: auto;
  border-radius: 15px;
  cursor: pointer;
  transition: outline-color .15s ease, box-shadow .15s ease;
}
.simple-editor-visual img.is-selected-image {
  outline: 3px solid rgba(37, 99, 235, .32);
  outline-offset: 3px;
  box-shadow: 0 0 0 1px var(--primary);
}
.simple-editor-visual table { width: 100%; border-collapse: collapse; margin: 1em 0; }
.simple-editor-visual th, .simple-editor-visual td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.simple-editor-visual th { background: var(--surface-soft); }
.simple-editor-markdown { resize: none; padding: 24px 28px; font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 14px; line-height: 1.62; tab-size: 2; }
.simple-editor-footer { min-height: 40px; display: flex; align-items: center; gap: 5px; padding: 5px 8px; border-top: 1px solid var(--border); background: var(--surface-soft); }
.simple-editor-footer button { border: 0; border-radius: 6px; background: transparent; color: var(--muted); padding: 6px 10px; cursor: pointer; font-size: 12px; font-weight: 700; }
.simple-editor-footer button.is-active { background: var(--surface); color: var(--primary); box-shadow: inset 0 0 0 1px var(--border); }
.simple-editor-hint { margin-left: auto; color: var(--muted); font-size: 10px; }

.outline { display: flex; flex-direction: column; gap: 2px; }
.outline-link {
  border: 0;
  border-left: 2px solid transparent;
  background: transparent;
  text-align: left;
  color: var(--muted);
  padding: 7px 6px 7px calc(8px + (var(--level, 2) - 2) * 10px);
  font-size: 12px;
  line-height: 1.3;
  cursor: pointer;
}
.outline-link:hover { color: var(--text); border-left-color: var(--primary); background: var(--surface-hover); }

.modal-backdrop { position: fixed; inset: 0; z-index: 90; background: rgba(13, 20, 34, .56); backdrop-filter: blur(3px); }
.modal {
  position: fixed;
  z-index: 100;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(530px, calc(100vw - 28px));
  max-height: calc(100vh - 28px);
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 15px;
  box-shadow: var(--shadow);
}
.modal-small { width: min(430px, calc(100vw - 28px)); }
.modal-wide { width: min(720px, calc(100vw - 28px)); }
.modal-header { display: flex; align-items: flex-start; justify-content: space-between; padding: 22px 24px 0; }
.modal-header h2 { margin: 4px 0 0; font-size: 25px; letter-spacing: -.025em; }
.modal-brand-lockup { display: flex; align-items: center; gap: 13px; }
.modal-brand-lockup > img { width: 46px; height: 46px; object-fit: contain; flex: 0 0 auto; }
.modal-body { padding: 18px 24px 24px; }
.modal-intro { margin: 0 0 16px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.modal label { display: grid; gap: 7px; margin-bottom: 15px; font-size: 13px; font-weight: 700; }
.modal label small { color: var(--muted); font-weight: 400; line-height: 1.4; }
.modal input, .modal select, .modal textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text);
  padding: 10px 11px;
  outline: none;
}
.modal input:focus, .modal select:focus, .modal textarea:focus { border-color: #82a9fa; box-shadow: 0 0 0 3px rgba(37,99,235,.10); }
.input-with-suffix { display: grid; grid-template-columns: minmax(0, 1fr) 90px; }
.input-with-suffix input { border-radius: 9px 0 0 9px; }
.input-with-suffix select { border-left: 0; border-radius: 0 9px 9px 0; }
.code-textarea { min-height: 300px; resize: vertical; font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace !important; font-size: 13px !important; line-height: 1.55; tab-size: 2; }
.form-error { min-height: 20px; color: var(--danger); font-size: 13px; margin: -4px 0 10px; }
body.modal-open { overflow: hidden; }

.toast-region { position: fixed; z-index: 120; right: 18px; bottom: 18px; display: grid; gap: 8px; width: min(390px, calc(100vw - 36px)); pointer-events: none; }
.toast { transform: translateY(10px); opacity: 0; padding: 12px 14px; border-radius: 10px; background: #1d2735; color: #fff; box-shadow: var(--shadow); font-size: 13px; line-height: 1.4; transition: transform .2s ease, opacity .2s ease; }
.toast.is-visible { transform: translateY(0); opacity: 1; }
.toast-success { background: #126847; }
.toast-warning { background: #8a5b08; }
.toast-error { background: #9e3734; }

@media (max-width: 1120px) {
  .workspace { grid-template-columns: 260px minmax(0, 1fr); }
  .outline-panel { display: none; }
}

@media (max-width: 760px) {
  /* Die Artikelnavigation bleibt sichtbar; ein separates Burger-Menü ist nicht nötig. */
  .workspace {
    grid-template-columns: 240px minmax(620px, 1fr);
    overflow-x: auto;
  }
  .tree-panel {
    position: static;
    width: auto;
    transform: none;
    box-shadow: none;
  }
  .editor-panel { height: calc(100vh - var(--topbar-height)); }
  .editor-shell { padding: 14px 10px 24px; }
  .brand-mark, .brand-mark img { width: 32px; height: 32px; }
  .brand-title { font-size: 14px; }
  .brand-subtitle { max-width: 36vw; }
  .topbar { padding: 0 8px; }
  .topbar-actions { gap: 4px; }
  .topbar-actions .save-state, #metadataButton { display: none; }
  .document-heading { align-items: flex-start; }
  .document-badges { display: none; }
  .simple-editor-body { height: calc(100vh - 226px); min-height: 420px; }
  .simple-editor-hint { display: none; }
  .simple-editor-callout-controls { width: 100%; }
  .simple-editor-toolbar .simple-editor-callout-type { flex: 0 0 104px; }
  .simple-editor-toolbar .simple-editor-callout-title { flex: 1 1 auto; width: auto; min-width: 90px; }
  .simple-editor-visual { padding: 22px 16px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111722;
    --surface: #171e2b;
    --surface-soft: #141b27;
    --surface-hover: #202a39;
    --text: #edf2f8;
    --muted: #9aa7ba;
    --border: #2a3444;
    --border-strong: #3a4658;
    --primary: #6d9cff;
    --primary-hover: #5b8cf0;
    --primary-soft: #1e3155;
    --success: #5ad3a0;
    --warning: #f4c461;
    --danger: #ff8c86;
    --shadow: 0 18px 50px rgba(0, 0, 0, .38);
  }
  .primary-button { color: #0e1a2b; }
  .tree-row.is-selected { color: #9fc0ff; }
  .badge { color: #bcd0ff; }
  .badge-muted { background: #242e3d; color: var(--muted); }
  .badge-warning { background: #4a3719; }
  .notice.warning { background: #2d2518; }
}

@media (max-width: 520px) {
  #previewButton { display: none; }
  #readerButton { padding-inline: 9px; font-size: 12px; }
}

/* Artikel-Sichtbarkeit */
.visibility-control {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 31px;
  padding: 3px 4px 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .03em;
  text-transform: uppercase;
  white-space: nowrap;
}
.visibility-control select {
  height: 25px;
  max-width: 150px;
  border: 0;
  border-radius: 999px;
  padding: 0 26px 0 9px;
  background: var(--primary-soft);
  color: #2352a2;
  outline: 0;
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
  cursor: pointer;
}
.visibility-control select.is-draft {
  background: #fff5d9;
  color: var(--warning);
}
.visibility-control select:disabled { cursor: not-allowed; opacity: .5; }

@media (max-width: 860px) {
  .visibility-control > span { display: none; }
  .visibility-control { padding-left: 4px; }
}