/* ── App-spezifische Ergänzungen ── */

        /* Bit-Zellen: einheitliche Größe */
        :root {
            --bs: 30px;
            --bf: 0.88em;
            --br: 6px;
            --bg: 4px;
        }

        /* Tab-Leiste */
        .tab-bar {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
            margin-bottom: 0;
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 0;
        }

        .tab-btn {
            padding: 10px 18px;
            border-radius: 10px 10px 0 0;
            border: 1px solid var(--border-color);
            border-bottom: none;
            background: var(--box-bg);
            color: var(--clr-muted);
            font-size: 0.88em;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-fast);
            display: flex;
            align-items: center;
            gap: 6px;
            touch-action: manipulation;
            font-family: inherit;
        }

        .tab-btn:hover {
            background: rgba(52, 211, 153, 0.07);
            color: var(--clr-text);
        }

        .tab-btn.active {
            background: var(--panel-bg);
            color: var(--clr-accent-text);
            border-color: var(--clr-accent);
            border-bottom: 2px solid var(--panel-bg);
            margin-bottom: -2px;
        }

        /* Tab-Inhalt */
        .tab-content {
            display: none;
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-top: none;
            border-radius: 0 0 var(--radius) var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
        }

        .tab-content.active {
            display: block;
        }

        /* Layout */
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .full-col {
            grid-column: 1/-1;
        }

        /* Panels im App-Bereich */
        .app-panel {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 16px;
        }

        .app-panel h3 {
            font-size: 0.95em;
            font-weight: 700;
            color: var(--clr-accent-text);
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .app-panel.accent-blue h3 {
            color: var(--clr-accent2-text);
        }

        .app-panel.accent-warn h3 {
            color: var(--warning-text);
        }

        .app-panel.accent-danger h3 {
            color: var(--danger-text);
        }

        /* Form-Elemente */
        .form-label {
            display: block;
            font-size: 0.78em;
            color: var(--clr-muted);
            margin-bottom: 4px;
            margin-top: 10px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .form-input {
            width: 100%;
            background: var(--clr-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--clr-text);
            padding: 9px 12px;
            font-size: 0.9em;
            outline: none;
            transition: var(--transition-fast);
            font-family: inherit;
        }

        .form-input:focus {
            border-color: var(--clr-accent);
            box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.15);
        }

        .form-select {
            width: 100%;
            background: var(--clr-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--clr-text);
            padding: 9px 12px;
            font-size: 0.9em;
            outline: none;
            transition: var(--transition-fast);
            font-family: inherit;
            appearance: none;
            background-image: url('data:image/svg+xml;utf8,<svg fill="%2394a3b8" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>');
            background-repeat: no-repeat;
            background-position: right 0.8rem top 50%;
        }

        .form-select:focus {
            border-color: var(--clr-accent);
            box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.15);
        }

        input[type="range"] {
            width: 100%;
            cursor: pointer;
            accent-color: var(--clr-accent);
            background: transparent;
            border: none;
            padding: 4px 0;
            touch-action: manipulation;
        }

        .range-display {
            text-align: center;
            color: var(--clr-accent-text);
            font-weight: bold;
            font-size: 0.95em;
            margin-top: 2px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 9px 16px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            cursor: pointer;
            font-size: 0.85em;
            font-weight: 600;
            transition: var(--transition-fast);
            white-space: nowrap;
            touch-action: manipulation;
            min-height: 38px;
            font-family: inherit;
            background: var(--box-bg);
            color: var(--clr-text);
        }

        .btn:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .btn:active {
            transform: scale(0.97);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
            color: var(--clr-on-accent);
            border: none;
            font-weight: 700;
        }

        .btn-primary:hover {
            box-shadow: 0 4px 14px rgba(52, 211, 153, 0.35);
        }

        .btn-send {
            background: linear-gradient(135deg, #f87171, #fb923c);
            color: #fff;
            border: none;
            font-weight: 700;
        }

        .btn-send:hover {
            box-shadow: 0 4px 14px rgba(248, 113, 113, 0.35);
        }

        .btn-solution {
            background: linear-gradient(135deg, var(--warning), #f59e0b);
            color: #0f172a;
            border: none;
            font-weight: 700;
        }

        .btn-solution:hover {
            box-shadow: 0 4px 14px rgba(251, 191, 36, 0.35);
        }

        .btn-ghost {
            background: transparent;
            color: var(--clr-muted);
            border-color: var(--border-color);
        }

        .btn-ghost:hover {
            color: var(--clr-text);
            background: var(--box-bg);
        }

        .btn-sm {
            padding: 6px 12px;
            font-size: 0.80em;
            min-height: 32px;
        }

        .btn-w100 {
            width: 100%;
        }

        .btn-row {
            display: flex;
            gap: 8px;
            margin-top: 12px;
            flex-wrap: wrap;
        }

        /* ── Bit-Zellen ── */
        .codeword-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--bg);
            margin-top: 6px;
            align-items: flex-end;
            min-height: 52px;
        }

        .bit-cell {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1px;
        }

        .bit-label-top {
            font-size: 0.58em;
            color: var(--clr-muted);
            text-align: center;
            min-height: 10px;
            line-height: 1.1;
            white-space: nowrap;
        }

        .bit-label-bot {
            font-size: 0.55em;
            color: var(--clr-muted);
            text-align: center;
            min-height: 9px;
            opacity: 0.6;
        }

        /* Statische Anzeige-Zelle */
        .bit-box {
            width: var(--bs);
            height: var(--bs);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--br);
            font-weight: bold;
            font-size: var(--bf);
            border: 2px solid transparent;
            transition: var(--transition-fast);
            flex-shrink: 0;
        }

        .bd {
            background: rgba(56, 189, 248, 0.12);
            border-color: rgba(56, 189, 248, 0.45);
            color: var(--clr-accent2-text);
        }

        .bp {
            background: rgba(251, 191, 36, 0.12);
            border-color: rgba(251, 191, 36, 0.45);
            color: var(--warning-text);
        }

        .berr {
            background: rgba(248, 113, 113, 0.2);
            border-color: var(--danger);
            color: var(--danger-text);
        }

        .bcorr {
            background: rgba(52, 211, 153, 0.15);
            border-color: var(--clr-accent);
            color: var(--clr-accent-text);
        }

        @keyframes pulse {

            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(248, 113, 113, 0.5);
            }

            50% {
                box-shadow: 0 0 0 5px rgba(248, 113, 113, 0);
            }
        }

        .pulse {
            animation: pulse 1.1s infinite;
        }

        /* Alle Edit-Inputs: gleiche Größe wie .bit-box */
        .bit-inp,
        .recv-inp,
        .dec-inp,
        .mc-inp,
        .ans-inp {
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
            display: block;
            width: var(--bs) !important;
            height: var(--bs) !important;
            min-width: 0 !important;
            max-width: none !important;
            padding: 0 !important;
            margin: 0;
            text-align: center;
            font-size: var(--bf);
            font-weight: bold;
            border-radius: var(--br);
            outline: none;
            transition: var(--transition-fast);
            flex-shrink: 0;
            touch-action: manipulation;
            font-family: inherit;
            box-sizing: border-box !important;
        }

        .bit-inp {
            border: 2px dashed rgba(251, 191, 36, 0.6);
            background: rgba(251, 191, 36, 0.07);
            color: var(--warning-text);
        }

        .bit-inp:focus {
            border-color: var(--warning);
            border-style: solid;
            background: rgba(251, 191, 36, 0.14);
        }

        .bit-inp.iok {
            border: 2px solid var(--clr-accent);
            background: rgba(52, 211, 153, 0.12);
            color: var(--clr-accent-text);
        }

        .bit-inp.ierr {
            border: 2px solid var(--danger);
            background: rgba(248, 113, 113, 0.12);
            color: var(--danger-text);
            animation: pulse 1.1s infinite;
        }

        .recv-inp {
            border: 2px solid rgba(56, 189, 248, 0.35);
            background: rgba(56, 189, 248, 0.07);
            color: var(--clr-accent2-text);
        }

        .recv-inp:focus {
            border-color: var(--clr-accent2);
            background: rgba(56, 189, 248, 0.14);
        }

        .recv-inp.corrected {
            border: 2px solid var(--clr-accent);
            background: rgba(52, 211, 153, 0.12);
            color: var(--clr-accent-text);
        }

        .recv-inp.rp {
            border: 2px solid rgba(251, 191, 36, 0.35);
            background: rgba(251, 191, 36, 0.07);
            color: var(--warning-text);
        }

        .recv-inp.rp:focus {
            border-color: var(--warning);
            background: rgba(251, 191, 36, 0.14);
        }

        .dec-inp {
            border: 2px dashed rgba(52, 211, 153, 0.5);
            background: rgba(52, 211, 153, 0.07);
            color: var(--clr-accent-text);
        }

        .dec-inp:focus {
            border-color: var(--clr-accent);
            border-style: solid;
            background: rgba(52, 211, 153, 0.14);
        }

        .dec-inp.iok {
            border: 2px solid var(--clr-accent);
            background: rgba(52, 211, 153, 0.15);
        }

        .dec-inp.ierr {
            border: 2px solid var(--danger);
            background: rgba(248, 113, 113, 0.12);
            color: var(--danger-text);
            animation: pulse 1.1s infinite;
        }

        .mc-inp {
            border: 2px dashed rgba(251, 191, 36, 0.6);
            background: rgba(251, 191, 36, 0.07);
            color: var(--warning-text);
        }

        .mc-inp:focus {
            border-color: var(--warning);
            border-style: solid;
            background: rgba(251, 191, 36, 0.14);
        }

        .mc-inp.iok {
            border: 2px solid var(--clr-accent);
            background: rgba(52, 211, 153, 0.12);
            color: var(--clr-accent-text);
        }

        .mc-inp.ierr {
            border: 2px solid var(--danger);
            background: rgba(248, 113, 113, 0.12);
            color: var(--danger-text);
        }

        .ans-inp {
            border: 2px dashed rgba(56, 189, 248, 0.5);
            background: rgba(56, 189, 248, 0.07);
            color: var(--clr-accent2-text);
        }

        .ans-inp:focus {
            border-color: var(--clr-accent2);
            border-style: solid;
            background: rgba(56, 189, 248, 0.14);
        }

        .ans-inp.iok {
            border: 2px solid var(--clr-accent);
            background: rgba(52, 211, 153, 0.12);
            color: var(--clr-accent-text);
        }

        .ans-inp.ierr {
            border: 2px solid var(--danger);
            background: rgba(248, 113, 113, 0.12);
            color: var(--danger-text);
            animation: pulse 1.1s infinite;
        }

        .ans-inp.ishw {
            border: 2px solid var(--warning);
            background: rgba(251, 191, 36, 0.1);
            color: var(--warning-text);
        }

        .ans-inp.wide {
            width: 44px !important;
        }

        /* Section-Titel */
        .section-title {
            font-size: 0.72em;
            color: var(--clr-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-top: 14px;
            margin-bottom: 4px;
            font-weight: 700;
        }

        /* Legende */
        .legend {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 6px;
        }

        .legend-item {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 0.74em;
            color: var(--clr-muted);
        }

        .leg-dot {
            width: 12px;
            height: 12px;
            border-radius: 3px;
            flex-shrink: 0;
        }

        /* Kanal */
        .channel-strip {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 10px;
            align-items: start;
            margin-top: 6px;
        }

        .arrow-col {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding-top: 28px;
            gap: 6px;
        }

        .noise-badge {
            background: rgba(248, 113, 113, 0.15);
            border: 1px solid rgba(248, 113, 113, 0.4);
            border-radius: 999px;
            padding: 3px 10px;
            font-size: 0.72em;
            color: var(--danger-text);
            white-space: nowrap;
        }

        /* Matrix */
        .matrix-wrap {
            overflow-x: auto;
            margin-top: 6px;
            -webkit-overflow-scrolling: touch;
        }

        .matrix-grid {
            display: inline-grid;
            gap: 3px;
        }

        .mc {
            width: var(--bs);
            height: var(--bs);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--br);
            font-weight: bold;
            font-size: var(--bf);
        }

        .mc-head {
            color: var(--clr-muted);
            font-size: 0.68em;
            font-weight: normal;
        }

        .mc-data {
            background: rgba(56, 189, 248, 0.12);
            border: 2px solid rgba(56, 189, 248, 0.4);
            color: var(--clr-accent2-text);
        }

        .mc-par {
            background: rgba(251, 191, 36, 0.12);
            border: 2px solid rgba(251, 191, 36, 0.4);
            color: var(--warning-text);
        }

        /* Venn */
        .venn-multi {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: flex-start;
            margin-top: 8px;
        }

        .venn-block {
            flex: 0 0 auto;
        }

        .venn-block-title {
            text-align: center;
            font-size: 0.73em;
            color: var(--clr-muted);
            margin-bottom: 3px;
            font-weight: 600;
        }

        .venn-block svg {
            width: 260px;
            height: auto;
            display: block;
        }

        .venn-info {
            display: flex;
            justify-content: center;
            margin: 14px 0 6px;
        }

        .venn-info svg {
            max-width: 300px;
            width: 100%;
        }

        /* Log */
        .log {
            background: var(--clr-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 10px 12px;
            font-family: 'Courier New', monospace;
            font-size: 0.76em;
            max-height: 160px;
            overflow-y: auto;
            line-height: 1.7;
            -webkit-overflow-scrolling: touch;
        }

        .le {
            color: var(--clr-muted);
        }

        .ls {
            color: var(--clr-accent2-text);
        }

        .lerr {
            color: var(--danger-text);
        }

        .lok {
            color: var(--clr-accent-text);
        }

        .lwarn {
            color: var(--warning-text);
        }

        .lpar {
            color: #a78bfa;
        }

        /* Info-Box im App-Bereich (Sender-Hinweis) */
        .app-info {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-left: 3px solid var(--clr-accent2);
            border-radius: 6px;
            padding: 8px 12px;
            font-size: 0.81em;
            line-height: 1.6;
            margin-top: 8px;
            color: var(--clr-muted);
        }

        .app-info.ok {
            border-left-color: var(--clr-accent);
            background: rgba(52, 211, 153, 0.06);
        }

        .app-info.err {
            border-left-color: var(--danger);
            background: rgba(248, 113, 113, 0.06);
        }

        .app-info.warn {
            border-left-color: var(--warning);
            background: rgba(251, 191, 36, 0.06);
        }

        .app-info.info {
            border-left-color: var(--clr-accent2);
        }

        /* Übungsbereich */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
            gap: 10px;
            margin-bottom: 18px;
        }

        .stat-card {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 12px;
            text-align: center;
        }

        .stat-val {
            font-size: 1.7em;
            font-weight: 800;
            color: var(--clr-accent-text);
            line-height: 1;
        }

        .stat-lbl {
            font-size: 0.70em;
            color: var(--clr-muted);
            margin-top: 3px;
        }

        .stat-card.streak-card .stat-val {
            color: var(--warning-text);
        }

        .stat-card.ok-card .stat-val {
            color: var(--clr-accent-text);
        }

        .stat-card.xp-card .stat-val {
            color: #a78bfa;
        }

        .badges-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 16px;
        }

        .ex-badge {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            padding: 8px 11px;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            background: var(--box-bg);
            font-size: 0.72em;
            color: var(--clr-muted);
            min-width: 72px;
            transition: var(--transition-fast);
        }

        .ex-badge.earned {
            border-color: rgba(251, 191, 36, 0.5);
            background: rgba(251, 191, 36, 0.1);
            color: var(--warning-text);
        }

        .ex-badge .badge-icon {
            font-size: 1.6em;
            filter: grayscale(1) opacity(0.35);
        }

        .ex-badge.earned .badge-icon {
            filter: none;
        }

        .ex-badge .badge-name {
            font-weight: 600;
            text-align: center;
            line-height: 1.2;
        }

        .diff-pills {
            display: flex;
            gap: 5px;
            flex-wrap: wrap;
            margin-top: 5px;
        }

        .diff-pill {
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid var(--border-color);
            background: var(--box-bg);
            color: var(--clr-muted);
            font-size: 0.80em;
            cursor: pointer;
            transition: var(--transition-fast);
            touch-action: manipulation;
            min-height: 32px;
            display: flex;
            align-items: center;
            font-family: inherit;
        }

        .diff-pill:hover {
            background: var(--clr-bg);
            color: var(--clr-text);
        }

        .diff-pill.active-easy {
            background: rgba(52, 211, 153, 0.15);
            border-color: var(--clr-accent);
            color: var(--clr-accent-text);
        }

        .diff-pill.active-medium {
            background: rgba(251, 191, 36, 0.15);
            border-color: var(--warning);
            color: var(--warning-text);
        }

        .diff-pill.active-hard {
            background: rgba(248, 113, 113, 0.15);
            border-color: var(--danger);
            color: var(--danger-text);
        }

        .ex-controls {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: flex-end;
            margin-bottom: 16px;
        }

        .ex-controls>div {
            flex: 1;
            min-width: 140px;
        }

        .ex-task-card {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 18px;
            margin-bottom: 14px;
        }

        .ex-task-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .ex-task-title {
            font-size: 0.98em;
            font-weight: 700;
            color: var(--clr-text);
            flex: 1;
        }

        .diff-badge {
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 0.75em;
            font-weight: 700;
        }

        .diff-easy {
            background: rgba(52, 211, 153, 0.15);
            color: var(--clr-accent-text);
            border: 1px solid var(--clr-accent);
        }

        .diff-medium {
            background: rgba(251, 191, 36, 0.15);
            color: var(--warning-text);
            border: 1px solid var(--warning);
        }

        .diff-hard {
            background: rgba(248, 113, 113, 0.15);
            color: var(--danger-text);
            border: 1px solid var(--danger);
        }

        .xp-label {
            font-size: 0.75em;
            color: #a78bfa;
            font-weight: 700;
        }

        .ex-task-desc {
            font-size: 0.85em;
            color: var(--clr-muted);
            line-height: 1.65;
            margin-bottom: 12px;
        }

        .answer-area {
            margin: 12px 0;
        }

        .answer-bits {
            display: flex;
            gap: var(--bg);
            flex-wrap: wrap;
            align-items: flex-end;
            margin-top: 5px;
        }

        .task-result {
            margin-top: 10px;
            padding: 10px 14px;
            border-radius: 8px;
            font-size: 0.85em;
            display: none;
        }

        .task-result.show {
            display: block;
        }

        .res-ok {
            background: rgba(52, 211, 153, 0.1);
            border: 1px solid var(--clr-accent);
            color: var(--clr-accent-text);
        }

        .res-err {
            background: rgba(248, 113, 113, 0.08);
            border: 1px solid var(--danger);
            color: var(--danger-text);
        }

        .res-hint {
            background: rgba(251, 191, 36, 0.08);
            border: 1px solid var(--warning);
            color: var(--warning-text);
        }

        .progress-bar-wrap {
            background: var(--clr-bg);
            border-radius: 999px;
            height: 7px;
            margin-top: 7px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .progress-bar {
            height: 100%;
            border-radius: 999px;
            transition: width 0.5s ease;
            background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent2));
        }

        .hist-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.78em;
        }

        .hist-table th {
            background: var(--box-bg);
            color: var(--clr-accent-text);
            padding: 6px 8px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            font-weight: 700;
        }

        .hist-table td {
            padding: 5px 8px;
            border-bottom: 1px solid var(--border-color);
            color: var(--clr-muted);
        }

        .hist-table tr:hover td {
            background: var(--box-bg);
        }

        .hist-ok {
            color: var(--clr-accent-text) !important;
        }

        .hist-err {
            color: var(--danger-text) !important;
        }

        @keyframes flamePulse {

            0%,
            100% {
                transform: scale(1);
            }

            50% {
                transform: scale(1.15);
            }
        }

        .flame {
            display: inline-block;
            animation: flamePulse 1.5s infinite;
        }

        @keyframes confettiFall {
            0% {
                transform: translateY(-20px) rotate(0);
                opacity: 1;
            }

            100% {
                transform: translateY(200px) rotate(720deg);
                opacity: 0;
            }
        }

        .confetti-piece {
            position: fixed;
            width: 7px;
            height: 7px;
            border-radius: 2px;
            pointer-events: none;
            animation: confettiFall 1.2s ease forwards;
            z-index: 9999;
        }

        /* Info-Tab Styles */
        .method-card {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 18px 20px;
            margin-bottom: 16px;
        }

        .method-card h3 {
            font-size: 1.05em;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            color: var(--clr-text);
            font-weight: 700;
        }

        .method-card p {
            font-size: 0.85em;
            line-height: 1.75;
            color: var(--clr-muted);
            margin-bottom: 8px;
        }

        .merksatz {
            background: rgba(52, 211, 153, 0.07);
            border-left: 4px solid var(--clr-accent);
            border-radius: 4px;
            padding: 9px 12px;
            font-size: 0.83em;
            color: var(--clr-muted);
            margin: 10px 0;
            font-style: italic;
        }

        .merksatz strong {
            color: var(--clr-accent-text);
            font-style: normal;
        }

        .example-box {
            background: var(--clr-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 12px 14px;
            margin: 10px 0;
            font-family: 'Courier New', monospace;
            font-size: 0.80em;
            line-height: 1.9;
            overflow-x: auto;
            color: var(--clr-muted);
        }

        .ex-lbl {
            font-family: 'Segoe UI', sans-serif;
            font-size: 0.80em;
            color: var(--clr-muted);
            margin-bottom: 5px;
            font-style: italic;
        }

        .hl-d {
            color: var(--clr-accent2-text);
            font-weight: bold;
        }

        .hl-p {
            color: var(--warning-text);
            font-weight: bold;
        }

        .hl-e {
            color: var(--danger-text);
            font-weight: bold;
        }

        .hl-ok {
            color: var(--clr-accent-text);
            font-weight: bold;
        }

        .info-tag {
            display: inline-block;
            border-radius: 999px;
            padding: 2px 8px;
            font-size: 0.72em;
            font-weight: 700;
            margin-left: 6px;
            vertical-align: middle;
        }

        .info-tag-blue {
            background: rgba(56, 189, 248, 0.15);
            color: var(--clr-accent2-text);
        }

        .info-tag-green {
            background: rgba(52, 211, 153, 0.15);
            color: var(--clr-accent-text);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.82em;
            margin-top: 10px;
        }

        .compare-table th {
            background: var(--box-bg);
            color: var(--clr-accent-text);
            padding: 7px 10px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            font-weight: 700;
        }

        .compare-table td {
            padding: 6px 10px;
            border-bottom: 1px solid var(--border-color);
            color: var(--clr-muted);
        }

        .compare-table tr:hover td {
            background: var(--box-bg);
        }

        /* Badge-Toast */
        @keyframes badgePop {
            0% {
                transform: scale(0.5);
                opacity: 0;
            }

            70% {
                transform: scale(1.2);
            }

            100% {
                transform: scale(1);
                opacity: 1;
            }
        }

        /* Responsive */
        @media (max-width: 700px) {
            :root {
                --bs: 32px;
                --bf: 0.9em;
            }

            .two-col {
                grid-template-columns: 1fr;
            }

            .full-col {
                grid-column: 1;
            }

            .channel-strip {
                grid-template-columns: 1fr;
                gap: 6px;
            }

            .arrow-col {
                flex-direction: row;
                padding-top: 0;
                padding: 4px 0;
                justify-content: center;
            }

            .tab-btn {
                padding: 7px 10px;
                font-size: 0.75em;
            }

            .tab-content {
                padding: 12px;
            }

            .stats-bar {
                grid-template-columns: 1fr 1fr 1fr;
            }

            .venn-multi {
                flex-direction: column;
            }

            .venn-block svg {
                width: 100%;
                max-width: 300px;
            }

            #receiverContent>div {
                grid-template-columns: 1fr !important;
            }

            .ex-controls {
                flex-direction: column;
            }
        }

        @media (max-width: 480px) {
            .stats-bar {
                grid-template-columns: 1fr 1fr;
            }

            .compare-table {
                font-size: 0.72em;
            }

            .compare-table th,
            .compare-table td {
                padding: 5px 6px;
            }
        }

        /* ── Test-Modul Styles (in <style> ergänzen) ── */

        .test-dot {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 2px solid var(--border-color);
            background: var(--box-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.65em;
            font-weight: 700;
            transition: var(--transition-fast);
            cursor: default;
            flex-shrink: 0;
        }

        .test-dot.dot-current {
            border-color: var(--clr-accent2);
            background: rgba(56, 189, 248, 0.15);
            color: var(--clr-accent2-text);
            transform: scale(1.2);
        }

        .test-dot.dot-ok {
            border-color: var(--clr-accent);
            background: rgba(52, 211, 153, 0.2);
            color: var(--clr-accent-text);
        }

        .test-dot.dot-err {
            border-color: var(--danger);
            background: rgba(248, 113, 113, 0.2);
            color: var(--danger-text);
        }

        .test-dot.dot-skip {
            border-color: var(--warning);
            background: rgba(251, 191, 36, 0.15);
            color: var(--warning-text);
        }

        .grade-display {
            text-align: center;
            padding: 20px;
        }

        .grade-number {
            font-size: 4em;
            font-weight: 900;
            line-height: 1;
        }

        .grade-label {
            font-size: 0.85em;
            color: var(--clr-muted);
            margin-top: 6px;
        }

        .diag-bar-wrap {
            background: var(--clr-bg);
            border-radius: 999px;
            height: 10px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            flex: 1;
        }

        .diag-bar {
            height: 100%;
            border-radius: 999px;
            transition: width 0.6s ease;
        }

        .diag-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 0.82em;
        }

        .diag-label {
            min-width: 110px;
            color: var(--clr-muted);
            font-weight: 600;
        }

        .diag-pct {
            min-width: 40px;
            text-align: right;
            font-weight: 700;
            font-size: 0.9em;
        }

        .diag-hint {
            font-size: 0.78em;
            color: var(--clr-muted);
            margin-top: 3px;
            padding-left: 110px;
            line-height: 1.5;
        }

        .result-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 10px;
            margin: 14px 0;
        }

        .result-stat {
            background: var(--clr-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 12px;
            text-align: center;
        }

        .result-stat-val {
            font-size: 1.8em;
            font-weight: 800;
            line-height: 1;
        }

        .result-stat-lbl {
            font-size: 0.70em;
            color: var(--clr-muted);
            margin-top: 4px;
        }

        @keyframes gradeReveal {
            0% {
                transform: scale(0.3);
                opacity: 0;
            }

            70% {
                transform: scale(1.15);
            }

            100% {
                transform: scale(1);
                opacity: 1;
            }
        }

        .grade-animate {
            animation: gradeReveal 0.6s ease forwards;
        }

        @media (max-width: 700px) {
            .result-grid {
                grid-template-columns: 1fr 1fr;
            }

            .diag-hint {
                padding-left: 0;
            }
        }

        /* Zertifikat-Button */
        .btn-cert {
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: #fff;
            border: none;
            font-weight: 700;
        }

        .btn-cert:hover {
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
        }

        /* ── Arbeitsblatt-Styles ── */
        .ws-check {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.83em;
            color: var(--clr-muted);
            cursor: pointer;
            padding: 3px 0;
        }

        .ws-check input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: var(--clr-accent);
            cursor: pointer;
            flex-shrink: 0;
        }

        .ws-check:hover {
            color: var(--clr-text);
        }