:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --beat-color: #2c7da0;
            --accent-beat-color: #e83e8c;
        }.history-section {
    background-color: #fff7e6;
    border-radius: 8px;
    padding: 1.2rem;
    margin: 1.5rem 0;
    border-left: 5px solid #b5651e;
}.practice-tip {
    background-color: #e6f7ff;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}.breadcrumb-item.active{color:#333}
      .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;color:#333
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .beat-indicator-container {
            display: flex;
            justify-content: center;
            gap: 1.2rem;
            margin: 2rem 0;
            flex-wrap: wrap;
        }
        .beat-light {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #dee2e6;
            transition: background-color 0.1s ease, transform 0.1s;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        .beat-light.active {
            background-color: var(--beat-color);
            transform: scale(1.15);
            box-shadow: 0 0 15px rgba(44,125,160,0.6);
        }
        .beat-light.accent.active {
            background-color: var(--accent-beat-color);
            box-shadow: 0 0 15px rgba(232,62,140,0.6);
        }
        .tempo-display {
            font-size: 3.5rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1.2;
        }
        .measure-counter {
            font-size: 1.2rem;
            color: var(--text-muted);
        }
        .preset-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            margin: 0.25rem;
        }
        .preset-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .music-box {
            background-color: rgba(232, 62, 140, 0.05);
            border-left: 3px solid var(--accent-beat-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
        }
        .table-term {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .table-term th, .table-term td {
            padding: 0.75rem;
            border: 1px solid var(--border-color);
        }
        .table-term th {
            background-color: var(--light-gray);
        }
        .tap-btn {
            background-color: #e9ecef;
            border: 2px solid var(--primary-color);
            font-weight: 700;
            letter-spacing: 1px;
        }
        .tap-btn:active {
            background-color: var(--primary-color);
            color: white;
        }