/* ── Applikationsspezifische Styles ── */

        /* ── NAV ── */
        .app-nav {
            background: var(--panel-bg);
            border-bottom: 1px solid var(--border-color);
            padding: 0 1.5rem;
            display: flex;
            gap: 0;
            overflow-x: auto;
            box-shadow: var(--shadow-sm);
        }

        .nav-btn {
            padding: 0.9rem 1rem;
            border: none;
            background: transparent;
            color: var(--clr-muted);
            cursor: pointer;
            font-size: 0.84rem;
            border-bottom: 3px solid transparent;
            transition: var(--transition-fast);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.35rem;
            font-family: inherit;
        }

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

        .nav-btn.active {
            color: var(--clr-accent-text);
            border-bottom-color: var(--clr-accent);
        }

        .nav-btn.done-nav::after {
            content: '✓';
            font-size: 0.68rem;
            color: var(--success-text);
            margin-left: 0.2rem;
        }

        /* ── SECTION ── */
        .section {
            display: none;
        }

        .section.active {
            display: block;
        }

        /* ── PRIMM LABELS ── */
        .primm-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 0.85rem;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 0.8rem;
        }

        .primm-predict {
            background: rgba(167, 139, 250, 0.15);
            color: #a78bfa;
            border: 1px solid rgba(167, 139, 250, 0.4);
        }

        .primm-run {
            background: rgba(52, 211, 153, 0.12);
            color: var(--success-text);
            border: 1px solid rgba(52, 211, 153, 0.4);
        }

        .primm-investigate {
            background: rgba(251, 191, 36, 0.12);
            color: var(--warning-text);
            border: 1px solid rgba(251, 191, 36, 0.4);
        }

        .primm-modify {
            background: rgba(56, 189, 248, 0.12);
            color: var(--clr-accent2-text);
            border: 1px solid rgba(56, 189, 248, 0.4);
        }

        .primm-make {
            background: rgba(216, 180, 254, 0.12);
            color: #d8b4fe;
            border: 1px solid rgba(216, 180, 254, 0.4);
        }

        html[data-theme="light"] .primm-make {
            color: #7c3aed;
            background: rgba(124, 58, 237, 0.08);
            border-color: rgba(124, 58, 237, 0.3);
        }

        /* ── TASK CARD (App-intern, nicht .task-card aus zec) ── */
        .app-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-fast);
        }

        .app-card.locked {
            opacity: 0.42;
            pointer-events: none;
        }

        .app-card h2 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--clr-text);
        }

        .app-card>p,
        .app-card>li {
            color: var(--clr-muted);
            font-size: 0.92rem;
            line-height: 1.6;
        }

        /* ── CODE BLOCK ── */
        .code-wrap {
            margin: 1rem 0;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            background: #0d1117;
        }

        html[data-theme="light"] .code-wrap {
            background: #f6f8fa;
            border-color: #d0d7de;
        }

        .code-inner {
            display: flex;
            overflow-x: auto;
        }

        .line-nums {
            display: flex;
            flex-direction: column;
            padding: 1rem 0;
            background: #090d12;
            border-right: 1px solid #21262d;
            user-select: none;
            flex-shrink: 0;
        }

        html[data-theme="light"] .line-nums {
            background: #f0f2f5;
            border-right-color: #d0d7de;
        }

        .line-nums span {
            display: block;
            padding: 0 0.75rem;
            font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
            font-size: 0.82rem;
            line-height: 1.75;
            color: #4a5568;
            text-align: right;
            min-width: 2.4rem;
        }

        .code-content {
            padding: 1rem 1.2rem;
            font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
            font-size: 0.87rem;
            line-height: 1.75;
            color: #e6edf3;
            white-space: pre;
            flex: 1;
        }

        html[data-theme="light"] .code-content {
            color: #24292f;
        }

        .kw {
            color: #ff7b72;
        }

        .tp {
            color: #79c0ff;
        }

        .fn {
            color: #d2a8ff;
        }

        .nm {
            color: #79c0ff;
        }

        .cm {
            color: #8b949e;
            font-style: italic;
        }

        .var {
            color: #ffa657;
        }

        .str {
            color: #a5d6ff;
        }

        html[data-theme="light"] .kw {
            color: #cf222e;
        }

        html[data-theme="light"] .tp {
            color: #0550ae;
        }

        html[data-theme="light"] .fn {
            color: #6639ba;
        }

        html[data-theme="light"] .nm {
            color: #0550ae;
        }

        html[data-theme="light"] .cm {
            color: #6e7781;
        }

        html[data-theme="light"] .var {
            color: #953800;
        }

        html[data-theme="light"] .str {
            color: #0a3069;
        }

        /* ── TRACE TABLE ── */
        .trace-container {
            overflow-x: auto;
            margin: 1rem 0;
        }

        .trace-table {
            border-collapse: collapse;
            width: 100%;
            min-width: 300px;
            font-size: 0.84rem;
        }

        .trace-table th {
            background: rgba(56, 189, 248, 0.1);
            color: var(--clr-accent2-text);
            padding: 0.55rem 0.7rem;
            text-align: center;
            border: 1px solid var(--border-color);
            font-weight: 600;
            white-space: nowrap;
        }

        .trace-table td {
            border: 1px solid var(--border-color);
            padding: 0.35rem 0.45rem;
            text-align: center;
            background: var(--box-bg);
            font-family: monospace;
            color: var(--clr-text);
        }

        .trace-table tr:nth-child(even) td {
            background: var(--panel-bg);
        }

        .trace-table td.fixed {
            color: var(--clr-muted);
        }

        .trace-input {
            background: var(--clr-bg);
            border: 1px solid var(--border-color);
            border-radius: 4px;
            color: var(--clr-text);
            font-family: monospace;
            font-size: 0.84rem;
            padding: 0.22rem 0.35rem;
            width: 80px;
            text-align: center;
            transition: border-color 0.2s;
        }

        .trace-input.wide {
            width: 110px;
        }

        .trace-input:focus {
            outline: none;
            border-color: var(--clr-accent2);
        }

        .trace-input.correct {
            border-color: var(--success);
            background: rgba(52, 211, 153, 0.08);
        }

        .trace-input.wrong {
            border-color: var(--danger);
            background: rgba(248, 113, 113, 0.08);
        }

        /* ── BUTTONS ── */
        .btn {
            padding: 0.58rem 1.3rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.87rem;
            font-weight: 600;
            transition: var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-family: inherit;
            background: var(--box-bg);
            color: var(--clr-text);
        }

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

        .btn-primary {
            background: var(--clr-accent2);
            color: var(--clr-on-accent);
            border-color: transparent;
        }

        .btn-primary:hover {
            background: #7dd3fc;
        }

        .btn-success {
            background: var(--success);
            color: var(--clr-on-accent);
            border-color: transparent;
        }

        .btn-success:hover {
            background: #4ade80;
        }

        .btn-warning {
            background: var(--warning);
            color: var(--clr-on-accent);
            border-color: transparent;
        }

        .btn-warning:hover {
            background: #fcd34d;
        }

        .btn-secondary {
            background: var(--box-bg);
            color: var(--clr-text);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            border-color: var(--clr-accent2);
            color: var(--clr-accent2-text);
        }

        .btn-sm {
            padding: 0.32rem 0.75rem;
            font-size: 0.77rem;
        }

        .btn-group {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
            margin-top: 1rem;
        }

        /* ── FEEDBACK ── */
        .feedback {
            padding: 0.75rem 1.1rem;
            border-radius: 8px;
            font-size: 0.88rem;
            margin-top: 0.8rem;
            display: none;
            animation: fadeIn 0.3s ease;
        }

        .feedback.show {
            display: flex;
            align-items: flex-start;
            gap: 0.55rem;
        }

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

        .feedback.err {
            background: rgba(248, 113, 113, 0.1);
            border: 1px solid var(--danger);
            color: var(--danger-text);
        }

        /* ── PROGRESS BAR ── */
        .progress-wrap {
            background: var(--box-bg);
            border-radius: 999px;
            height: 6px;
            overflow: hidden;
            margin: 0.35rem 0;
        }

        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent2));
            border-radius: 999px;
            transition: width 0.4s ease;
        }

        /* ── STEP INDICATOR ── */
        .step-indicator {
            display: flex;
            gap: 0.35rem;
            align-items: center;
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }

        .step {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.78rem;
            color: var(--clr-muted);
        }

        .step-num {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.68rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .step.done .step-num {
            background: var(--success);
            color: var(--clr-on-accent);
        }

        .step.active .step-num {
            background: var(--clr-accent2);
            color: var(--clr-on-accent);
        }

        .step.active {
            color: var(--clr-text);
        }

        .step-sep {
            color: var(--border-color);
            font-size: 0.8rem;
        }

        /* ── HINT ── */
        .hint-btn {
            font-size: 0.77rem;
            color: var(--warning-text);
            background: none;
            border: 1px solid var(--warning);
            border-radius: 6px;
            padding: 0.28rem 0.65rem;
            cursor: pointer;
            transition: var(--transition-fast);
            font-family: inherit;
        }

        .hint-btn:hover {
            background: rgba(251, 191, 36, 0.12);
        }

        .hint-box {
            background: rgba(251, 191, 36, 0.06);
            border: 1px solid var(--warning);
            border-radius: 8px;
            padding: 0.75rem 1rem;
            font-size: 0.84rem;
            color: var(--warning-text);
            margin-top: 0.6rem;
            display: none;
            line-height: 1.6;
        }

        .hint-box.show {
            display: block;
            animation: fadeIn 0.3s;
        }

        /* ── INFO BOX (App-intern) ── */
        .app-info-box {
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 8px;
            padding: 0.85rem 1.1rem;
            font-size: 0.87rem;
            color: var(--clr-accent2-text);
            margin: 0.7rem 0;
            display: flex;
            gap: 0.55rem;
            align-items: flex-start;
        }

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

        /* ── CHOICE BUTTONS ── */
        .choice-group {
            display: flex;
            gap: 0.55rem;
            flex-wrap: wrap;
            margin-top: 0.6rem;
        }

        /* ── CODE EDITOR ── */
        .code-editor {
            background: #0d1117;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            margin: 1rem 0;
        }

        html[data-theme="light"] .code-editor {
            background: #f6f8fa;
        }

        .editor-toolbar {
            background: #161b22;
            padding: 0.45rem 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid #30363d;
        }

        html[data-theme="light"] .editor-toolbar {
            background: #f0f2f5;
            border-bottom-color: #d0d7de;
        }

        .editor-toolbar span {
            font-size: 0.74rem;
            color: var(--clr-muted);
        }

        .editor-body {
            display: flex;
            align-items: stretch;
        }

        .editor-line-nums {
            background: #090d12;
            border-right: 1px solid #21262d;
            padding: 0.9rem 0;
            flex-shrink: 0;
            user-select: none;
            pointer-events: none;
            overflow-y: hidden;
            min-width: 2.6rem;
        }

        html[data-theme="light"] .editor-line-nums {
            background: #f0f2f5;
            border-right-color: #d0d7de;
        }

        .editor-line-nums span {
            display: block;
            font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
            font-size: 0.84rem;
            line-height: 1.75;
            color: #4a5568;
            text-align: right;
            padding: 0 0.7rem;
        }

        textarea.code-textarea {
            flex: 1;
            background: #0d1117;
            border: none;
            color: #e6edf3;
            font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
            font-size: 0.84rem;
            line-height: 1.75;
            padding: 0.9rem 1.2rem;
            resize: none;
            overflow-y: hidden;
            overflow-x: auto;
            tab-size: 4;
            box-sizing: border-box;
            white-space: pre;
            word-wrap: normal;
            height: auto;
        }

        html[data-theme="light"] textarea.code-textarea {
            background: #f6f8fa;
            color: #24292f;
        }

        textarea.code-textarea:focus {
            outline: none;
        }

        /* ── TASK HEADER ── */
        .task-header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 0.8rem;
        }

        .task-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--clr-text);
        }

        .difficulty {
            display: flex;
            gap: 3px;
            align-items: center;
        }

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

        .dot.filled {
            background: var(--warning);
        }

        /* ── BADGES ── */
        .badges-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
            gap: 0.75rem;
            margin-top: 0.8rem;
        }

        .badge-item {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 0.85rem;
            text-align: center;
            opacity: 0.28;
            filter: grayscale(0.6);
            transition: var(--transition);
        }

        .badge-item.earned {
            opacity: 1;
            filter: none;
            border-color: var(--warning);
            background: rgba(251, 191, 36, 0.06);
            box-shadow: 0 0 14px rgba(251, 191, 36, 0.2);
            animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        .badge-item:not(.earned):hover {
            opacity: 0.5;
            filter: grayscale(0.2);
        }

        @keyframes popIn {
            from {
                transform: scale(0.8);
                opacity: 0;
            }

            to {
                transform: scale(1);
                opacity: 1;
            }
        }

        .badge-icon {
            font-size: 1.9rem;
            margin-bottom: 0.3rem;
        }

        .badge-name {
            font-size: 0.74rem;
            font-weight: 700;
            color: var(--clr-text);
        }

        .badge-desc {
            font-size: 0.66rem;
            color: var(--clr-muted);
            margin-top: 0.18rem;
        }

        .badge-item:not(.earned) .badge-icon::after {
            content: ' 🔒';
            font-size: 0.65rem;
            vertical-align: super;
        }

        /* ── DASHBOARD ── */
        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .dash-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 1.1rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .dash-card .big-num {
            font-size: 2.3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .dash-card .label {
            font-size: 0.79rem;
            color: var(--clr-muted);
            margin-top: 0.18rem;
        }

        /* ── STATS BAR (header) ── */
        .stats-bar {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
        }

        .stat-pill {
            background: var(--box-bg);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            padding: 0.35rem 0.9rem;
            font-size: 0.82rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--clr-text);
        }

        .stat-pill .val {
            font-weight: 700;
            color: #a78bfa;
        }

        .streak-anim {
            animation: flicker 1.5s infinite alternate;
        }

        @keyframes flicker {
            from {
                filter: drop-shadow(0 0 4px #f97316);
            }

            to {
                filter: drop-shadow(0 0 12px #fb923c);
            }
        }


        /* ── TOAST ── */
        .toast-container {
            position: fixed;
            top: 1.5rem;
            right: 1.5rem;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .toast {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 0.75rem 1.1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.85rem;
            box-shadow: var(--shadow);
            animation: slideIn 0.3s ease;
            min-width: 230px;
            max-width: 310px;
            color: var(--clr-text);
        }

        .toast.badge-toast {
            border-color: var(--warning);
        }

        .toast.success-toast {
            border-color: var(--success);
        }

        .toast.streak-toast {
            border-color: #f97316;
        }

        @keyframes slideIn {
            from {
                transform: translateX(120%);
                opacity: 0;
            }

            to {
                transform: none;
                opacity: 1;
            }
        }

        @keyframes slideOut {
            from {
                transform: none;
                opacity: 1;
            }

            to {
                transform: translateX(120%);
                opacity: 0;
            }
        }

        .toast.hiding {
            animation: slideOut 0.3s ease forwards;
        }

        /* ── COMPLETION OVERLAY ── */
        .completion-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.82);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 9997;
        }

        .completion-overlay.show {
            display: flex;
            animation: fadeIn 0.3s;
        }

        .completion-box {
            background: var(--panel-bg);
            border: 2px solid var(--warning);
            border-radius: var(--radius-lg);
            padding: 2.4rem;
            text-align: center;
            max-width: 400px;
            width: 90%;
            color: var(--clr-text);
        }

        .completion-box h2 {
            font-size: 1.65rem;
            margin-bottom: 0.5rem;
            color: var(--clr-text);
        }

        .completion-box p {
            color: var(--clr-muted);
            margin-bottom: 1rem;
        }

        .xp-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--warning), #f59e0b);
            color: #1c1608;
            font-weight: 800;
            font-size: 1.15rem;
            padding: 0.38rem 1.1rem;
            border-radius: 999px;
            margin: 0.45rem 0;
        }

        #confetti-canvas {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 9998;
        }

        /* ── PRIMM-INFO GRID ── */
        .primm-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 0.65rem;
            margin-top: 0.8rem;
        }

        .primm-grid-item {
            border-radius: 8px;
            padding: 0.75rem;
        }

        .primm-grid-item .pg-title {
            font-weight: 700;
            margin-bottom: 0.25rem;
            font-size: 0.88rem;
        }

        .primm-grid-item .pg-desc {
            font-size: 0.78rem;
        }

        @media (max-width: 640px) {
            .app-header {
                padding: 1rem;
            }

            main {
                padding: 1rem 0.8rem 3rem;
            }

            .nav-btn {
                padding: 0.75rem 0.7rem;
                font-size: 0.76rem;
            }

            .trace-input {
                width: 58px;
            }
        }