* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
            text-align: center;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            padding: 30px;
        }

        h1 {
            color: #333;
            text-align: center;
            margin-bottom: 30px;
            font-size: 2em;
        }

        #mindFingerLink {
            padding: 10px;
        }

        .input-section {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
            margin-bottom: 30px;
        }

        .input-group {
            display: flex;
            gap: 15px;
            align-items: center;
            flex-wrap: wrap;
        }

        label {
            font-weight: 600;
            color: #555;
        }

        input[type="number"] {
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            width: 150px;
            transition: border-color 0.3s;
        }

        input[type="number"]:focus {
            outline: none;
            border-color: #667eea;
        }

        button {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
        }

        button:hover {
            transform: translateY(-2px);
        }

        button:active {
            transform: translateY(0);
        }

        .note-info {
            margin-left: auto;
            padding: 10px 20px;
            background: #e3f2fd;
            border-radius: 8px;
            font-size: 14px;
            color: #1976d2;
        }

        .detected-note {
            margin-top: 15px;
            padding: 15px;
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            color: white;
            border-radius: 8px;
            font-weight: 600;
            text-align: center;
            font-size: 1.1em;
        }

        .results {
            display: none;
        }

        .results.active {
            display: block;
        }

        .octave-section {
            margin-bottom: 25px;
            background: #fafafa;
            border-radius: 10px;
            padding: 20px;
            border: 1px solid #e0e0e0;
        }

        .octave-header {
            font-size: 1.2em;
            font-weight: 600;
            color: #333;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #667eea;
        }

        .intervals-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 10px;
        }

        .interval-item {
            display: flex;
            justify-content: space-between;
            padding: 10px 15px;
            background: white;
            border-radius: 6px;
            border: 1px solid #e0e0e0;
            transition: all 0.2s;
        }

        .interval-item:hover {
            border-color: #667eea;
            box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
        }

        .interval-item.reference {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            font-weight: 600;
        }

        .interval-name {
            font-weight: 500;
            color: #555;
        }

        .interval-item.reference .interval-name {
            color: white;
        }

        .frequency {
            font-family: 'Courier New', monospace;
            font-weight: 600;
            color: #764ba2;
        }

        .interval-item.reference .frequency {
            color: white;
        }

        .tuning-info {
            margin-top: 15px;
            padding: 10px;
            background: #fff3e0;
            border-radius: 8px;
            font-size: 14px;
            color: #e65100;
            text-align: center;
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px;
            }
            
            h1 {
                font-size: 1.5em;
            }
            
            .intervals-grid {
                grid-template-columns: 1fr;
            }
            
            .input-group {
                flex-direction: column;
                align-items: stretch;
            }
            
            input[type="number"] {
                width: 100%;
            }
            
            .note-info {
                margin-left: 0;
                margin-top: 10px;
            }
        }