h1 {
    text-align: center;
    font-size: 2rem;
    color: var(--primary-color, #1e293b);
    margin-bottom: 25px;
    font-weight: 800;
}

.description {
    margin-bottom: 30px;
    color: #64748b;
    font-size: 1.05rem;
    text-align: center;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.sim-wrapper {
    justify-content: center;
    margin: 30px 0;
    overflow: visible;
}
.container { margin: 20px; }
:root {
            --primary-color: #3b82f6;
            --primary-hover: #2563eb;
            --bg-color: #f1f5f9;
            --card-bg: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --panel-bg: #f8f9fa;
            --border-color: #e2e8f0;
        }

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            margin: 0;
            }

        .card {
            background: var(--card-bg);
            border-radius: 16px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            padding: 24px;
            flex-direction: column;
            gap: 20px;
        }

        .header-deprecated {
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 16px;
            margin-bottom: 8px;
        }

        .header-deprecated {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
        }

        .header-deprecated {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        #total {
            width: 680px;
            height: 400px;
            position: relative;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            margin: 0 auto;
            transform-origin: top center;
        }

        #canvas {
            position: absolute;
            left: 0;
            top: 0;
            width: 400px;
            height: 400px;
        }

        #panel {
            position: absolute;
            left: 400px;
            top: 0;
            width: 280px;
            height: 400px;
            background: var(--panel-bg);
            border-left: 1px solid var(--border-color);
            padding: 12px;
            box-sizing: border-box;
            flex-direction: column;
            gap: 12px;
            overflow-y: auto;
        }

        /* 覆盖 app.css 中的强制绝对定位 */
        #panel div, #panel span, #panel input, #panel select, #panel button, #panel label {
            position: relative !important;
            top: auto !important;
            left: auto !important;
        }

        #panel span {
            white-space: normal !important;
        }

        .input-group {
            flex-direction: column;
            gap: 6px;
        }

        .input-row {
            align-items: center;
            justify-content: space-between;
            gap: 8px;
        }

        label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
            white-space: nowrap;
            flex-shrink: 0;
        }

        input[type="text"] {
            width: 100px;
            padding: 6px 10px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 0.9rem;
            outline: none;
            transition: border-color 0.2s;
            text-align: center;
        }

        input[type="text"]:focus {
            border-color: var(--primary-color);
        }

        .nav-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 4px;
            width: 150px;
            margin: 8px auto;
        }

        .nav-btn {
            aspect-ratio: 1;
            align-items: center;
            justify-content: center;
            background: #e2e8f0;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background 0.2s;
        }

        .nav-btn:hover { background: #cbd5e1; }
        .nav-btn.active { background: var(--primary-color); color: white; }

        .footer-info {
            margin-top: 12px;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Responsive Scaling */
        @media (max-width: 700px) {
            #total { /* scale removed */ margin-bottom: -160px; }
        }
        @media (max-width: 450px) {
    #total { /* scale removed */ }
    .sim-wrapper { height: 220px; }
    h1 { font-size: 1.5rem; }
}