body {
            overflow: hidden;
            height: 100vh
        }

        .app-shell {
            display: flex;
            flex-direction: column;
            height: 100vh;
            overflow: hidden
        }

        .top-bar {
            flex-shrink: 0;
            background: var(--clr-surface);
            border-bottom: 1px solid var(--border-color);
            padding: 0 1.25rem;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            z-index: 50
        }

        .top-bar-logo {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap
        }

        .top-bar-stats {
            display: flex;
            gap: 8px;
            align-items: center
        }

        .stat-chip {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            padding: 3px 10px;
            font-size: .78rem;
            font-weight: 600;
            color: var(--clr-muted);
            display: flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap
        }

        .stat-chip.clickable {
            cursor: pointer;
            transition: var(--transition-fast)
        }

        .stat-chip.clickable:hover {
            border-color: var(--clr-accent);
            color: var(--clr-accent-text)
        }

        .top-bar .theme-toggle {
            position: static;
            width: 34px;
            height: 34px;
            font-size: 1rem;
            flex-shrink: 0
        }

        .app-body {
            display: flex;
            flex: 1;
            overflow: hidden;
            min-height: 0
        }

        .sidebar {
            width: 230px;
            flex-shrink: 0;
            background: var(--clr-surface);
            border-right: 1px solid var(--border-color);
            overflow-y: auto;
            padding: 10px 6px
        }

        .sidebar-title {
            text-align: center;
            color: var(--clr-accent-text);
            font-size: .72rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-weight: 700;
            margin-bottom: 10px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-color)
        }

        .sidebar-section {
            font-size: .65rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--clr-muted);
            font-weight: 700;
            padding: 8px 4px 3px;
            border-top: 1px solid var(--border-color);
            margin-top: 4px
        }

        .task-item {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 8px 10px;
            margin-bottom: 6px;
            cursor: pointer;
            transition: var(--transition-fast)
        }

        .task-item:hover {
            border-color: var(--clr-accent);
            transform: translateX(2px)
        }

        .task-item.active {
            border-color: var(--clr-accent);
            background: rgba(52, 211, 153, .06)
        }

        .task-item.completed {
            border-color: var(--success)
        }

        .task-item.locked {
            opacity: .4;
            cursor: not-allowed
        }

        .task-item-title {
            font-size: .8rem;
            font-weight: 700;
            margin-bottom: 3px;
            color: var(--clr-text)
        }

        .task-item-meta {
            display: flex;
            align-items: center;
            justify-content: space-between
        }

        .content-col {
            flex: 1;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            min-width: 0
        }

        .task-bar {
            flex-shrink: 0;
            background: var(--clr-surface);
            border-bottom: 1px solid var(--border-color);
            padding: 8px 14px
        }

        .task-bar-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 4px;
            flex-wrap: wrap
        }

        .task-bar-title {
            font-size: .95rem;
            font-weight: 700;
            color: var(--clr-accent-text);
            margin: 0
        }

        .task-bar-desc {
            font-size: 1rem;
            color: var(--clr-text);
            line-height: 1.5;
            margin: 6px 0 0 0;
            padding: 8px 12px;
            background: rgba(52, 211, 153, 0.05);
            border-left: 3px solid var(--clr-accent);
            border-radius: 0 8px 8px 0;
            font-weight: 500
        }

        .learning-goal-chip {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: rgba(56, 189, 248, .08);
            border: 1px solid rgba(56, 189, 248, .3);
            border-radius: 999px;
            padding: 2px 10px;
            font-size: .72rem;
            color: var(--clr-accent2-text);
            font-weight: 600;
            white-space: nowrap
        }

        .diff-selector {
            display: flex;
            gap: 5px;
            margin-top: 4px
        }

        .diff-btn {
            padding: 3px 9px;
            border-radius: 999px;
            border: 1.5px solid transparent;
            cursor: pointer;
            font-size: .7rem;
            font-weight: 700;
            background: transparent;
            transition: var(--transition-fast);
            font-family: inherit
        }

        .diff-btn:disabled {
            opacity: .3;
            cursor: not-allowed
        }

        .diff-btn-1 {
            border-color: var(--success);
            color: var(--success-text)
        }

        .diff-btn-1.active {
            background: var(--success);
            color: var(--clr-on-accent)
        }

        .diff-btn-2 {
            border-color: var(--warning);
            color: var(--warning-text)
        }

        .diff-btn-2.active {
            background: var(--warning);
            color: var(--clr-on-accent)
        }

        .diff-btn-3 {
            border-color: var(--danger);
            color: var(--danger-text)
        }

        .diff-btn-3.active {
            background: var(--danger);
            color: #fff
        }

        .control-bar {
            display: flex;
            gap: 5px;
            margin-top: 6px;
            align-items: center;
            flex-wrap: wrap
        }

        .cw-btn {
            padding: 5px 12px;
            border-radius: 999px;
            border: 1.5px solid transparent;
            cursor: pointer;
            font-size: .76rem;
            font-weight: 700;
            font-family: inherit;
            transition: var(--transition-fast);
            white-space: nowrap
        }

        .cw-btn:disabled {
            opacity: .35;
            cursor: not-allowed
        }

        .cw-btn-run {
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
            color: var(--clr-on-accent);
            box-shadow: 0 2px 8px rgba(52, 211, 153, .25)
        }

        .cw-btn-run:hover:not(:disabled) {
            box-shadow: 0 4px 16px rgba(52, 211, 153, .4)
        }

        .cw-btn-step {
            background: transparent;
            border-color: var(--warning);
            color: var(--warning-text)
        }

        .cw-btn-step:hover:not(:disabled) {
            background: rgba(251, 191, 36, .1)
        }

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

        .cw-btn-reset:hover {
            border-color: var(--clr-muted);
            color: var(--clr-text)
        }

        .cw-btn-hint {
            background: transparent;
            border-color: rgba(56, 189, 248, .4);
            color: var(--clr-accent2-text)
        }

        .cw-btn-hint:hover {
            background: rgba(56, 189, 248, .08)
        }

        .cw-btn-sol {
            background: transparent;
            border-color: rgba(167, 139, 250, .4);
            color: #a78bfa
        }

        .cw-btn-sol:hover {
            background: rgba(167, 139, 250, .08)
        }

        .block-counter {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            padding: 3px 10px;
            font-size: .75rem;
            color: var(--clr-muted)
        }

        .block-counter.over {
            border-color: var(--danger);
            color: var(--danger-text)
        }

        .speed-ctrl {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: .72rem;
            color: var(--clr-muted)
        }

        .speed-ctrl input[type=range] {
            width: 65px;
            accent-color: var(--clr-accent)
        }

        .progress-outer {
            background: var(--box-bg);
            border-radius: 6px;
            height: 3px;
            margin-top: 6px
        }

        .progress-inner {
            height: 3px;
            border-radius: 6px;
            background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent2));
            transition: width .5s ease
        }

        .workspace-row {
            display: flex;
            flex: 1;
            overflow: hidden;
            min-height: 0
        }

        .world-panel {
            width: 300px;
            min-width: 220px;
            flex-shrink: 0;
            background: var(--clr-bg);
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 10px 8px;
            gap: 7px;
            overflow: hidden;
            transition: width 0.15s ease
        }

        .world-panel-title {
            font-size: .72rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-weight: 700;
            color: var(--clr-accent-text);
            flex-shrink: 0
        }

        #game-grid {
            display: grid;
            gap: 1px;
            background: #000;
            border: 1.5px solid var(--clr-accent);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 0 18px rgba(52, 211, 153, .2);
            flex-shrink: 0
        }

        .cell {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            transition: background .2s
        }

        .cell-trail {
            background: rgba(52, 211, 153, .07) !important
        }

        .cell-success-flash {
            animation: sFlash .5s ease 4
        }

        @keyframes sFlash {

            0%,
            100% {
                background: rgba(52, 211, 153, .15) !important
            }

            50% {
                background: rgba(52, 211, 153, .55) !important
            }
        }

        .robot {
            display: inline-block;
            font-size: 1.15rem;
            transition: transform .2s
        }

        .robot-n {
            transform: rotate(0deg)
        }

        .robot-e {
            transform: rotate(90deg)
        }

        .robot-s {
            transform: rotate(180deg)
        }

        .robot-w {
            transform: rotate(270deg)
        }

        .world-info {
            font-size: .7rem;
            color: var(--clr-muted);
            text-align: center;
            flex-shrink: 0
        }

        .var-display {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 5px 10px;
            font-size: .72rem;
            color: var(--clr-muted);
            width: 100%;
            box-sizing: border-box;
            flex-shrink: 0;
            min-height: 32px
        }

        .var-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap
        }

        .var-chip {
            background: rgba(52, 211, 153, .1);
            border: 1px solid var(--clr-accent);
            border-radius: 6px;
            padding: 2px 8px;
            color: var(--clr-accent-text);
            font-family: 'Courier New', monospace;
            font-size: .75rem
        }

        .speed-row {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: .7rem;
            color: var(--clr-muted);
            flex-shrink: 0
        }

        .speed-row input[type=range] {
            width: 75px;
            accent-color: var(--clr-accent)
        }

        /* Resizable world panel */
        .world-panel {
            position: relative;
        }

        .resize-handle {
            width: 6px;
            flex-shrink: 0;
            background: var(--border-color);
            cursor: col-resize;
            transition: background .2s;
            position: relative;
            z-index: 10;
        }
        .resize-handle:hover, .resize-handle.dragging {
            background: var(--clr-accent);
        }
        .resize-handle::after {
            content: '⋮';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: var(--clr-muted);
            font-size: .7rem;
            letter-spacing: -2px;
            pointer-events: none;
        }

        .blockly-panel {
            flex: 1;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            min-width: 0;
            position: relative;
            background: var(--clr-bg)
        }

        .blockly-panel-header {
            flex-shrink: 0;
            background: var(--clr-surface);
            border-bottom: 1px solid var(--border-color);
            padding: 5px 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .72rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-weight: 700;
            color: var(--clr-accent-text)
        }

        #step-indicator {
            display: none;
            margin-left: auto;
            background: rgba(251, 191, 36, .12);
            border: 1px solid var(--warning);
            border-radius: 999px;
            padding: 2px 9px;
            font-size: .72rem;
            color: var(--warning-text);
            white-space: nowrap
        }

        #block-flash-bar {
            height: 2px;
            flex-shrink: 0;
            background: transparent;
            transition: background .12s
        }

        #block-flash-bar.active {
            background: var(--warning)
        }

        #blockly-div {
            flex: 1;
            min-height: 0;
            min-width: 0;
            contain: strict
        }

        .bottom-row {
            display: flex;
            height: 150px;
            flex-shrink: 0;
            border-top: 1px solid var(--border-color)
        }

        .debug-pane,
        .feedback-pane {
            flex: 1;
            background: var(--clr-surface);
            padding: 7px 11px;
            overflow-y: auto;
            min-width: 0
        }

        .debug-pane {
            border-right: 1px solid var(--border-color)
        }

        .pane-label {
            font-size: .68rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-weight: 700;
            color: var(--clr-muted);
            margin-bottom: 4px
        }

        .debug-log {
            font-family: 'Courier New', monospace;
            font-size: .74rem
        }

        .debug-log div {
            padding: 1px 0
        }

        .log-info {
            color: var(--clr-accent2-text)
        }

        .log-success {
            color: var(--success-text)
        }

        .log-error {
            color: var(--danger-text)
        }

        .log-warn {
            color: var(--warning-text)
        }

        .log-step {
            color: var(--clr-muted)
        }

        .fb-msg {
            padding: 7px 10px;
            border-radius: 8px;
            font-size: .8rem;
            line-height: 1.4;
            font-weight: 600
        }

        .fb-success {
            background: rgba(52, 211, 153, .08);
            border: 1px solid var(--success);
            color: var(--success-text)
        }

        .fb-error {
            background: rgba(248, 113, 113, .08);
            border: 1px solid var(--danger);
            color: var(--danger-text)
        }

        .fb-hint {
            background: rgba(251, 191, 36, .08);
            border: 1px solid var(--warning);
            color: var(--warning-text)
        }

        .fb-info {
            background: rgba(56, 189, 248, .08);
            border: 1px solid var(--clr-accent2);
            color: var(--clr-accent2-text)
        }

        .fb-explain {
            display: flex;
            flex-direction: column;
            gap: 4px
        }

        .fb-explain-row {
            display: flex;
            gap: 6px;
            align-items: flex-start;
            font-size: .78rem
        }

        .fb-explain-icon {
            flex-shrink: 0;
            font-size: 1rem
        }

        .fb-explain-text {
            color: var(--clr-muted);
            line-height: 1.4
        }

        .fb-explain-text strong {
            color: var(--clr-text)
        }

        /* ══ MODAL OVERRIDE ══
   zec_breit.css nutzt opacity/visibility + .is-open
   Wir überschreiben das hier vollständig                */
        .cw-modal {
            display: flex;
            position: fixed;
            inset: 0;
            z-index: 3000;
            background: rgba(0, 0, 0, .6);
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity .2s, visibility .2s;
        }

        .cw-modal.is-open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .cw-modal-box {
            background: var(--clr-surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 22px;
            max-width: 520px;
            width: 92%;
            position: relative;
            box-shadow: var(--shadow-lg);
            max-height: 85vh;
            overflow-y: auto;
        }

        .cw-modal-box h3 {
            color: var(--clr-accent-text);
            margin-bottom: 10px;
            font-size: 1.05rem
        }

        .cw-modal-box p {
            color: var(--clr-muted);
            font-size: .86rem;
            line-height: 1.5;
            margin-bottom: 8px
        }

        .cw-modal-close {
            position: absolute;
            top: 12px;
            right: 14px;
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--clr-muted);
            cursor: pointer
        }

        .cw-modal-close:hover {
            color: var(--danger-text)
        }

        .concept-box {
            background: rgba(52, 211, 153, .05);
            border: 1px solid rgba(52, 211, 153, .2);
            border-radius: 10px;
            padding: 12px 14px;
            margin-bottom: 12px
        }

        .concept-box h4 {
            color: var(--clr-accent-text);
            font-size: .85rem;
            margin-bottom: 6px
        }

        .concept-box p {
            font-size: .8rem;
            color: var(--clr-muted);
            margin: 0;
            line-height: 1.5
        }

        .concept-analogy {
            background: rgba(251, 191, 36, .06);
            border-left: 3px solid var(--warning);
            padding: 8px 12px;
            border-radius: 0 8px 8px 0;
            margin: 8px 0;
            font-size: .79rem;
            color: var(--clr-muted);
            font-style: italic
        }

        .concept-analogy strong {
            color: var(--warning-text);
            font-style: normal
        }

        .concept-example {
            background: rgba(0, 0, 0, .2);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 10px;
            font-family: 'Courier New', monospace;
            font-size: .76rem;
            color: var(--success-text);
            white-space: pre;
            margin-top: 8px
        }

        .hint-step {
            background: rgba(56, 189, 248, .06);
            border-left: 3px solid var(--clr-accent2);
            padding: 6px 10px;
            margin: 4px 0;
            border-radius: 0 8px 8px 0;
            font-size: .8rem;
            color: var(--clr-muted)
        }

        .hint-step strong {
            color: var(--clr-text)
        }

        .hint-level-selector {
            display: flex;
            gap: 6px;
            margin-bottom: 10px;
            flex-wrap: wrap
        }

        .hint-lvl-btn {
            padding: 3px 10px;
            border-radius: 999px;
            border: 1.5px solid var(--border-color);
            background: transparent;
            color: var(--clr-muted);
            cursor: pointer;
            font-size: .72rem;
            font-family: inherit
        }

        .hint-lvl-btn.active {
            border-color: var(--clr-accent2);
            color: var(--clr-accent2-text);
            background: rgba(56, 189, 248, .08)
        }

        .solution-code {
            background: rgba(0, 0, 0, .25);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 10px;
            font-family: 'Courier New', monospace;
            font-size: .76rem;
            color: var(--success-text);
            white-space: pre-wrap;
            margin-top: 6px
        }

        .success-modal-box {
            text-align: center
        }

        .success-modal-box .big-icon {
            font-size: 3rem;
            display: block;
            margin: 8px 0
        }

        .success-modal-box h3 {
            color: var(--success-text);
            font-size: 1.2rem
        }

        .xp-tag {
            color: var(--warning-text);
            font-size: .95rem;
            margin: 5px 0;
            font-weight: 700
        }

        .reflection-box {
            background: rgba(52, 211, 153, .05);
            border: 1px solid rgba(52, 211, 153, .2);
            border-radius: 10px;
            padding: 12px;
            text-align: left;
            margin: 10px 0
        }

        .reflection-box h4 {
            font-size: .8rem;
            color: var(--clr-accent-text);
            margin-bottom: 6px
        }

        .reflection-q {
            font-size: .78rem;
            color: var(--clr-muted);
            padding: 4px 0;
            border-bottom: 1px solid var(--border-color)
        }

        .reflection-q:last-child {
            border-bottom: none
        }

        .cw-modal-btn-row {
            margin-top: 12px;
            display: flex;
            justify-content: flex-end;
            gap: 8px;
            flex-wrap: wrap
        }

        .btn-primary {
            padding: 8px 20px;
            border-radius: 999px;
            border: none;
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
            color: var(--clr-on-accent);
            font-weight: 700;
            font-size: .85rem;
            cursor: pointer;
            font-family: inherit;
            box-shadow: 0 3px 12px rgba(52, 211, 153, .25);
            transition: var(--transition-fast)
        }

        .btn-primary:hover {
            box-shadow: 0 6px 20px rgba(52, 211, 153, .4)
        }

        .btn-secondary {
            padding: 6px 16px;
            border-radius: 999px;
            border: 1px solid var(--border-color);
            background: transparent;
            color: var(--clr-muted);
            font-weight: 600;
            font-size: .82rem;
            cursor: pointer;
            font-family: inherit;
            transition: var(--transition-fast)
        }

        .btn-secondary:hover {
            border-color: var(--clr-muted);
            color: var(--clr-text)
        }

        .badges-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 7px;
            margin-top: 10px
        }

        .badge-card {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 10px 6px;
            text-align: center
        }

        .badge-card.earned {
            border-color: var(--warning);
            background: rgba(251, 191, 36, .05)
        }

        .badge-card.locked-badge {
            opacity: .3;
            filter: grayscale(1)
        }

        .badge-icon-lg {
            font-size: 1.6rem;
            display: block;
            margin-bottom: 3px
        }

        .badge-name {
            font-size: .68rem;
            font-weight: 700;
            color: var(--clr-text)
        }

        .badge-desc {
            font-size: .6rem;
            color: var(--clr-muted);
            margin-top: 2px
        }

        .celebration {
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 9999
        }

        .confetti {
            position: absolute;
            border-radius: 2px;
            animation: fall linear forwards
        }

        @keyframes fall {
            0% {
                transform: translateY(-10px) rotate(0deg);
                opacity: 1
            }

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

        /* Onboarding */
        .cw-onboarding {
            display: flex;
            position: fixed;
            inset: 0;
            z-index: 4000;
            background: rgba(0, 0, 0, .75);
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity .2s, visibility .2s
        }

        .cw-onboarding.is-open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto
        }

        .onboarding-card {
            background: var(--clr-surface);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 28px 26px;
            max-width: 480px;
            width: 92%;
            box-shadow: 0 8px 40px rgba(0, 0, 0, .6)
        }

        .onboarding-card h2 {
            color: var(--clr-accent-text);
            font-size: 1.2rem;
            margin-bottom: 8px
        }

        .onboarding-card p {
            color: var(--clr-muted);
            font-size: .86rem;
            line-height: 1.6;
            margin-bottom: 10px
        }

        .ob-steps {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin: 12px 0
        }

        .ob-step {
            display: flex;
            gap: 10px;
            align-items: flex-start
        }

        .ob-num {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            flex-shrink: 0;
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
            color: var(--clr-on-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .75rem;
            font-weight: 800
        }

        .ob-text {
            font-size: .82rem;
            color: var(--clr-muted);
            padding-top: 3px;
            line-height: 1.4
        }

        .ob-text strong {
            color: var(--clr-text)
        }

        .ob-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 16px
        }

        .ob-dots {
            display: flex;
            gap: 6px
        }

        .ob-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--border-color)
        }

        .ob-dot.active {
            background: var(--clr-accent)
        }

        .concept-intro-banner {
            display: none;
            background: linear-gradient(135deg, rgba(52, 211, 153, .08), rgba(56, 189, 248, .06));
            border: 1px solid rgba(52, 211, 153, .25);
            border-radius: 10px;
            padding: 10px 14px;
            margin-top: 5px;
            font-size: .8rem;
            color: var(--clr-muted);
            line-height: 1.5
        }

        .concept-intro-banner.visible {
            display: block
        }

        .concept-intro-banner strong {
            color: var(--clr-accent-text)
        }

        ::-webkit-scrollbar {
            width: 4px
        }

        ::-webkit-scrollbar-track {
            background: transparent
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 2px
        }

        @keyframes slideInToast {
            from {
                opacity: 0;
                transform: translateX(40px);
            }

            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* Missions-Buttons: kompakter als normale diff-btn */
        .diff-btn {
            padding: 3px 7px;
            border-radius: 999px;
            border: 1.5px solid var(--border-color);
            cursor: pointer;
            font-size: .68rem;
            font-weight: 700;
            background: transparent;
            transition: var(--transition-fast);
            font-family: inherit;
            color: var(--clr-muted);
        }

        .diff-btn:disabled {
            opacity: .3;
            cursor: not-allowed;
        }

        /* Touch: Tippflächen mind. 24 px hoch */
        @media (pointer: coarse) {
            .diff-btn,
            #btn-concept-more {
                min-height: 24px;
            }
        }
    
        /* Kontrast-Korrekturen (WCAG AA, 2026-10-07): gleiche Farbtöne, nur dunkler bzw. heller */
        html[data-theme="light"] .concept-example { color: #046e50; }  /* statt #047857 */
        html[data-theme="light"] .cw-btn-sol { color: #7e55f8; }  /* statt #a78bfa */
        html[data-theme="light"] .concept-example { color: #065f46; }

        /* ── Tablet und Smartphone: Bereiche untereinander, Seite scrollt ── */
        @media (max-width: 900px) {
            body,
            .app-shell {
                height: auto;
                overflow: visible;
            }

            .top-bar {
                height: auto;
                flex-wrap: wrap;
                padding: .5rem .75rem;
                gap: .5rem;
            }

            .top-bar-stats {
                flex-wrap: wrap;
            }

            .app-body,
            .workspace-row,
            .bottom-row {
                flex-direction: column;
                overflow: visible;
            }

            .sidebar {
                width: auto;
                max-height: 240px;
                border-right: none;
                border-bottom: 1px solid var(--border-color);
            }

            .content-col {
                overflow: visible;
            }

            .world-panel {
                width: auto !important;
                min-width: 0;
                overflow-x: auto;
            }

            .resize-handle {
                display: none;
            }

            .blockly-panel {
                height: 70vh;
                min-height: 420px;
                flex: none;
            }

            .bottom-row {
                height: auto;
            }

            .feedback-pane,
            .debug-pane {
                min-height: 120px;
            }

            .learning-goal-chip {
                white-space: normal;
            }

            .diff-selector {
                flex-wrap: wrap;
            }
        }