:root {
  --bg: #f5f5f7;
  --fg: #1d1d1f;
  --accent: #0073e6;
  --accent-hover: #4a9eff;
  --sidebar: #ffffff;
  --border: #d2d2d7;

  /* Font-Tokens */
  --font-base: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* Font-Size-Tokens */
  --fs-xs: 11px;
  --fs-sm: 12px;
  --fs-base: 14px;
  --fs-lg: 16px;
  --fs-xl: 20px;
  --fs-2xl: 24px;

  /* Font-Weight-Tokens */
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-bold: 600;

  /* Line-Height */
  --lh-tight: 1.3;
  --lh-base: 1.5;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 32px;

  /* Border-Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Status-Farben: Info */
  --color-info-bg: #e8f4fd;
  --color-info-border: #b3d7f0;
  --color-info-text: #1a5276;

  /* Status-Farben: Success */
  --color-success-bg: #e4f5e1;
  --color-success-border: #9fca94;
  --color-success-text: #2c5d22;

  /* Status-Farben: Error */
  --color-error-bg: #fbe3e3;
  --color-error-border: #d4a0a0;
  --color-error-text: #7a1f1f;

  /* Status-Farben: Warning */
  --color-warning-bg: #fff8e1;
  --color-warning-border: #f0d68a;
  --color-warning-text: #7a5c00;

  /* Sonstige Farben */
  --color-muted: #666;
  --color-highlight: #327195;

  /* Tabellen */
  --table-header-bg: #4a7c9b;
  --table-header-fg: #ffffff;
  --table-stripe: #f9fafb;
  --table-border: #e5e7eb;

  /* Inputs */
  --input-bg: #ffffff;
  --input-border: #d2d2d7;
  --input-focus-border: #0073e6;
  --input-radius: var(--radius-sm);

  /* Buttons */
  --btn-bg: #0073e6;
  --btn-fg: #ffffff;
  --btn-hover-bg: #005bb5;
  --btn-radius: var(--radius-sm);
  --btn-secondary-bg: #e5e5ea;
  --btn-secondary-fg: #1d1d1f;
  --btn-secondary-hover-bg: #d1d1d6;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-base); font-size: var(--fs-base); line-height: var(--lh-base); color: var(--fg); background: var(--bg); }

.ub-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 56px minmax(0, 1fr) auto;
  grid-template-areas:
    "header header"
    "nav    main"
    "ads    ads";
  height: 100vh;
  overflow: hidden;
}

.ub-header { grid-area: header; background: #fff; border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 16px; gap: 16px; }
.ub-header h1 { font-size: 18px; margin: 0; }
.ub-header nav { margin-left: auto; }
.ub-nav { grid-area: nav; background: var(--sidebar); border-right: 1px solid var(--border); padding: 16px; overflow-y: auto; }
.ub-nav h2 { font-size: 12px; text-transform: uppercase; color: #666; margin: 16px 0 4px; letter-spacing: 0.5px; }
.ub-nav a { display: flex; align-items: center; gap: 8px; padding: 6px 8px; color: var(--fg); text-decoration: none; border-radius: 4px; transition: background-color 0.15s ease, color 0.15s ease; }
.ub-nav a .ub-nav-icon { flex: 0 0 18px; width: 18px; height: 18px; display: inline-flex; align-items: center; justify-content: center; color: var(--color-muted); transition: color 0.15s ease; }
.ub-nav a .ub-nav-icon svg { width: 100%; height: 100%; display: block; }
.ub-nav a:hover { background: var(--accent-hover); color: #fff; }
.ub-nav a.active { background: var(--accent); color: #fff; }
.ub-nav a:hover .ub-nav-icon,
.ub-nav a.active .ub-nav-icon { color: #fff; }

.ub-main { grid-area: main; padding: 24px; overflow-y: auto; }
.ub-breadcrumb { font-size: 13px; color: #666; margin-bottom: 16px; }
.ub-breadcrumb a { color: #666; text-decoration: none; }
.ub-breadcrumb a:hover { text-decoration: underline; }

.ub-ads { grid-area: ads; background: #fff; border-top: 1px solid var(--border); padding: 8px 16px; text-align: center; }

.ub-menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; padding: 4px 8px; color: var(--fg); }

@media (max-width: 900px) {
  .ub-menu-toggle { display: block; }

  .ub-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 56px minmax(0, 1fr) auto;
    grid-template-areas: "header" "main" "ads";
  }

  .ub-nav { display: none; }

  .ub-layout.nav-open {
    grid-template-rows: 56px auto minmax(0, 1fr) auto;
    grid-template-areas: "header" "nav" "main" "ads";
  }
  .ub-layout.nav-open .ub-nav {
    display: block;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

.ub-flash {
  padding: 10px 14px;
  margin: 12px 0;
  border-radius: 4px;
  font-family: Verdana, sans-serif;
  font-size: 12px;
}
.ub-flash-ok {
  background: #e4f5e1;
  color: #2c5d22;
  border: 1px solid #9fca94;
}
.ub-flash-err {
  background: #fbe3e3;
  color: #7a1f1f;
  border: 1px solid #d4a0a0;
}
.form-table-header {
  background: var(--table-header-bg);
  color: var(--table-header-fg);
  padding: 6px 10px;
  text-align: left;
  font-size: var(--fs-sm);
  font-family: var(--font-base);
}

/* =============================================
   DESIGN-SYSTEM: Basis-Typografie
   ============================================= */

.ub-main h1 {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  margin: 0 0 var(--space-md);
  color: var(--fg);
}
.ub-main h2 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--fg);
}
.ub-main h3 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
  margin: var(--space-md) 0 var(--space-xs);
  color: var(--fg);
}
.ub-main p {
  margin: 0 0 var(--space-md);
  line-height: var(--lh-base);
}
.ub-main a {
  color: var(--accent);
  text-decoration: none;
}
.ub-main a:hover {
  text-decoration: underline;
}
.ub-main a.ub-btn:hover {
  text-decoration: none;
}
.ub-main a.ub-btn-primary {
  color: var(--btn-fg);
}
.ub-main a.ub-btn-secondary {
  color: var(--btn-secondary-fg);
}
.ub-main a.ub-btn-danger {
  color: var(--color-error-text);
}

/* =============================================
   DESIGN-SYSTEM: Komponenten
   ============================================= */

/* --- Info-Box --- */
.ub-info {
  background: var(--color-info-bg);
  border-left: 4px solid var(--color-info-border);
  color: var(--color-info-text);
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
}

/* --- Warning-Box --- */
.ub-warning {
  background: var(--color-warning-bg);
  border-left: 4px solid var(--color-warning-border);
  color: var(--color-warning-text);
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
}

/* --- Formular --- */
.ub-form {
  max-width: 600px;
}
.ub-field {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.ub-field-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}
.ub-label {
  min-width: 120px;
  max-width: 180px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--fg);
  flex-shrink: 0;
}
.ub-label-full {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--fg);
  margin-bottom: var(--space-xs);
}
.ub-input,
.ub-select,
.ub-textarea {
  font-family: var(--font-base);
  font-size: var(--fs-sm);
  padding: 6px 10px;
  border: 1px solid var(--input-border);
  border-radius: var(--input-radius);
  background: var(--input-bg);
  color: var(--fg);
  outline: none;
  transition: border-color 0.15s ease;
}
.ub-input:focus,
.ub-select:focus,
.ub-textarea:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px rgba(0, 115, 230, 0.12);
}
.ub-input { max-width: 100%; }
.ub-textarea {
  resize: vertical;
  min-height: 80px;
  max-width: 100%;
}
.ub-select {
  cursor: pointer;
}
.ub-input-group {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* --- Buttons --- */
.ub-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-base);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  padding: 6px 16px;
  border: none;
  border-radius: var(--btn-radius);
  cursor: pointer;
  text-decoration: none;
  line-height: var(--lh-tight);
  transition: background-color 0.15s ease, box-shadow 0.15s ease;
}
.ub-btn:hover { text-decoration: none; }
.ub-btn-primary {
  background: var(--btn-bg);
  color: var(--btn-fg);
}
.ub-btn-primary:hover {
  background: var(--btn-hover-bg);
}
.ub-btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-fg);
}
.ub-btn-secondary:hover {
  background: var(--btn-secondary-hover-bg);
}
.ub-btn-danger {
  background: var(--color-error-bg);
  color: var(--color-error-text);
  border: 1px solid var(--color-error-border);
}
.ub-btn-danger:hover {
  background: #f5c6c6;
}

/* --- Daten-Tabellen --- */
.ub-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  margin: var(--space-md) 0;
}
.ub-table thead th {
  background: var(--table-header-bg);
  color: var(--table-header-fg);
  padding: 8px 10px;
  text-align: left;
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
}
.ub-table tbody td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--table-border);
  vertical-align: top;
}
.ub-table tbody tr:nth-child(even) {
  background: var(--table-stripe);
}
.ub-table tbody tr:hover {
  background: #eef3f7;
}

/* --- Link-Listen --- */
.ub-link-list {
  list-style: none;
  padding: 0;
  margin: var(--space-sm) 0;
}
.ub-link-list li {
  padding: var(--space-xs) 0;
}
.ub-link-list a {
  color: var(--accent);
  text-decoration: none;
  font-size: var(--fs-sm);
}
.ub-link-list a:hover {
  text-decoration: underline;
}

/* --- Checkbox/Radio-Gruppen --- */
.ub-check-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin: var(--space-sm) 0;
}
.ub-check-group label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  cursor: pointer;
}

/* --- Trennlinie --- */
.ub-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-lg) 0;
}

/* --- Section-Title --- */
.ub-section-title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--fg);
  margin: var(--space-lg) 0 var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border);
  max-width: 560px;
}

/* --- Karten --- */
.ub-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin: var(--space-md) 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.ub-card-header {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  margin: 0 0 var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}
.ub-card-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
}

/* --- Fehlerseite --- */
.ub-error-box {
  max-width: 480px;
  margin: var(--space-xl) auto;
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  color: var(--color-error-text);
}
.ub-error-box h2 {
  margin: 0 0 var(--space-sm);
  color: var(--color-error-text);
}

/* --- Schritt-Items --- */
.ub-step-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}
.ub-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  flex-shrink: 0;
  margin-top: 0;
}
.ub-step-content {
  flex: 1;
  padding-top: 3px;
  font-size: var(--fs-base);
  line-height: var(--lh-base);
}
.ub-main .ub-step-content h3 {
  margin: 0 0 var(--space-xs);
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
}
.ub-step-content p {
  font-size: var(--fs-base);
}

/* --- Sidebar-Box --- */
.ub-sidebar-box {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  font-size: var(--fs-sm);
}

/* --- Color-Picker --- */
.ub-color-field {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.ub-color-preview {
  width: 28px;
  height: 28px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

/* --- Editor --- */
.ub-editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: var(--space-sm);
  background: #f0f0f0;
  border: 1px solid var(--input-border);
  border-bottom: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.ub-editor-toolbar select {
  font-family: var(--font-base);
  font-size: var(--fs-xs);
  padding: 2px 6px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--fg);
  cursor: pointer;
  appearance: auto;
}
.ub-editor-toolbar select:hover {
  border-color: var(--accent);
}
.ub-editor-toolbar img {
  vertical-align: middle;
}
.ub-editor-area {
  width: 100%;
  height: calc(100vh - 300px);
  border: 1px solid var(--input-border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  padding: var(--space-sm);
  font-family: var(--font-base);
  font-size: var(--fs-base);
  outline: none;
}

/* --- Formular-Sections --- */
.ub-form-section {
  margin: var(--space-lg) 0;
}
.ub-form-section-title {
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  color: var(--fg);
  margin: 0 0 var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border);
  max-width: 560px;
}

/* --- Read-Only-Felder --- */
.ub-readonly {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--input-radius);
  padding: 6px 10px;
  font-size: var(--fs-sm);
  color: var(--color-muted);
  cursor: default;
}

/* --- Aktions-Tabelle --- */
.ub-action-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  margin: var(--space-md) 0;
}
.ub-action-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--table-border);
  vertical-align: middle;
}
.ub-action-table tr:nth-child(even) {
  background: var(--table-stripe);
}
.ub-action-table tr:hover {
  background: #eef3f7;
}
.ub-card-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
  flex: 1 1 auto;
  min-width: 0;
}
.ub-card-desc {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.4;
  color: var(--text-muted, #555);
}
.ub-action-links {
  display: flex;
  gap: var(--space-sm);
}
.ub-action-links a {
  font-size: var(--fs-xs);
  color: var(--accent);
  text-decoration: none;
}
.ub-action-links a:hover {
  text-decoration: underline;
}
.ub-action-danger a {
  color: var(--color-error-text);
}
.ub-action-danger a:hover {
  color: #a02020;
}

/* --- Highlight --- */
.ub-highlight {
  color: var(--color-highlight);
  font-weight: var(--fw-bold);
}

/* Bildergalerie */
.ub-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.ub-gallery-item {
  position: relative;
  border: 1px solid #ccc;
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.ub-gallery-item:has(input[type="checkbox"]:checked) {
  border-color: #1668b3;
  box-shadow: 0 0 0 2px rgba(22, 104, 179, 0.25);
}

.ub-gallery-item input[type="checkbox"] {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 2;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.ub-gallery-label {
  display: block;
  cursor: pointer;
}

.ub-gallery-thumb-link {
  display: flex;
  aspect-ratio: 1 / 1;
  background: #f4f4f4;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ub-gallery-thumb-link img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.ub-gallery-item:has(input[type="checkbox"]:checked) .ub-gallery-thumb-link img {
  opacity: 0.75;
}

.ub-gallery-name {
  display: block;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: #fafafa;
  border-top: 1px solid #eee;
}

.ub-gallery-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1rem 0;
  padding: 0.5rem 0.75rem;
  background: #f4f6f8;
  border-radius: 4px;
}

.ub-gallery-counter {
  flex-grow: 1;
  font-size: 0.9rem;
  color: #555;
}

.ub-gallery-actions .ub-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Bestaetigungs-Dialog */
dialog.ub-confirm {
  border: 1px solid #999;
  border-radius: 6px;
  padding: 1.5rem;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

dialog.ub-confirm::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

dialog.ub-confirm h3 {
  margin-top: 0;
}

dialog.ub-confirm ul {
  max-height: 180px;
  overflow-y: auto;
  margin: 0.75rem 0;
  padding-left: 1.25rem;
  font-size: 0.9rem;
}

.ub-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* Pagination / Blätterfunktion */
.ub-pager {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 1rem 0;
}

.ub-pager-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #fff;
  color: #1668b3;
  text-decoration: none;
  font-size: 0.9rem;
  cursor: pointer;
}

.ub-pager-item:hover:not(.ub-pager-current):not(.ub-pager-disabled):not(.ub-pager-ellipsis) {
  background: #e8f0f8;
  border-color: #1668b3;
}

.ub-pager-current {
  background: #1668b3;
  color: #fff;
  border-color: #1668b3;
  font-weight: 600;
}

.ub-pager-disabled,
.ub-pager-ellipsis {
  color: #999;
  border-color: #eee;
  background: #fafafa;
  cursor: default;
}