:root {
        --primary: #4361ee;
        --primary-dark: #3a56d4;
        --secondary: #7209b7;
        --accent: #f72585;
        --light: #f8f9fa;
        --dark: #212529;
        --gray: #6c757d;
        --success: #4cc9f0;
        --border-radius: 12px;
        --shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        --transition: all 0.3s ease;
    }


    .header {
        text-align: center;
        margin-bottom: 40px;
        margin-top: 40px;
    }

    .header h1 {
        font-size: 2.5rem;
        color: var(--dark);
        margin-bottom: 10px;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        display: inline-block;
    }

    .header p {
        color: var(--gray);
        font-size: 1.1rem;
        max-width: 600px;
        margin: 0 auto;
    }

    .card {
        background: white;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        padding: 30px;
        margin-bottom: 30px;
        transition: var(--transition);
    }

    .card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    }

    .converter-container {
        display: grid;
        grid-template-columns: 2fr 1fr;
        gap: 30px;
    }

    @media (max-width: 768px) {
        .converter-container {
            grid-template-columns: 1fr;
        }
    }

    .text-input-section {
        display: flex;
        flex-direction: column;
    }

    .text-input-section label {
        font-weight: 600;
        margin-bottom: 10px;
        color: var(--dark);
        display: flex;
        align-items: center;
    }

    .text-input-section label i {
        margin-right: 8px;
        color: var(--primary);
    }

    #textInput {
        width: 100%;
        min-height: 200px;
        padding: 15px;
        border: 2px solid #e9ecef;
        border-radius: var(--border-radius);
        font-size: 16px;
        resize: vertical;
        transition: var(--transition);
        margin-bottom: 15px;
    }

    #textInput:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    }

    .text-stats {
        display: flex;
        justify-content: space-between;
        margin-bottom: 20px;
        font-size: 0.9rem;
        color: var(--gray);
    }

    .controls-section {
        display: flex;
        flex-direction: column;
    }

    .control-group {
        margin-bottom: 20px;
    }

    .control-group label {
        display: block;
        margin-bottom: 8px;
        font-weight: 600;
        color: var(--dark);
    }

    select, .action-buttons button, #playSample, #downloadBtn {
        width: 100%;
        padding: 12px 15px;
        border-radius: var(--border-radius);
        border: 2px solid #e9ecef;
        font-size: 16px;
        transition: var(--transition);
    }

    select:focus {
        outline: none;
        border-color: var(--primary);
    }

    .action-buttons button, #playSample, #downloadBtn {
        background: var(--primary);
        color: white;
        border: none;
        cursor: pointer;
        font-weight: 600;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-top: 10px;
    }

    .action-buttons button:hover, #playSample:hover, #downloadBtn:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
    }

    .action-buttons button:active, #playSample:active, #downloadBtn:active {
        transform: translateY(0);
    }

    .action-buttons button i, #playSample i, #downloadBtn i {
        margin-right: 8px;
    }

    #downloadBtn:disabled {
        opacity: 0.6;
        cursor: not-allowed;
        transform: none;
    }

    #downloadBtn.downloading {
        background: var(--accent);
    }

    .voice-preview {
        margin-top: 20px;
        padding: 15px;
        background: #f8f9fa;
        border-radius: var(--border-radius);
        text-align: center;
    }

    .voice-preview p {
        margin-bottom: 10px;
        color: var(--gray);
    }

    #playSample {
        background: var(--secondary);
        width: auto;
        padding: 8px 15px;
        font-size: 0.9rem;
    }

    #playSample:hover {
        background: #5f0b9c;
    }

    .visualizer {
        height: 100px;
        margin: 20px 0;
        display: flex;
        align-items: flex-end;
        justify-content: center;
        gap: 3px;
    }

    .bar {
        width: 8px;
        background: linear-gradient(to top, var(--primary), var(--accent));
        border-radius: 4px 4px 0 0;
        transition: height 0.1s ease;
    }

    .action-buttons {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 15px;
        margin-top: 20px;
    }

    #pauseBtn {
        background: var(--gray);
    }

    #stopBtn {
        background: #e63946;
    }

    #pauseBtn:hover {
        background: #5a6268;
    }

    #stopBtn:hover {
        background: #d00000;
    }

    .animation-container {
        text-align: center;
        margin: 30px 0;
    }

    .mypulse {
        display: inline-block;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: var(--success);
        box-shadow: 0 0 0 0 rgba(76, 201, 240, 0.7);
        animation: mypulse 1.5s infinite;
    }

    @keyframes mypulse {
        0% {
            transform: scale(0.95);
            box-shadow: 0 0 0 0 rgba(76, 201, 240, 0.7);
        }

        70% {
            transform: scale(1);
            box-shadow: 0 0 0 15px rgba(76, 201, 240, 0);
        }

        100% {
            transform: scale(0.95);
            box-shadow: 0 0 0 0 rgba(76, 201, 240, 0);
        }
    }

    .status {
        text-align: center;
        margin: 15px 0;
        font-weight: 600;
        min-height: 24px;
    }

    .speaking {
        color: var(--success);
    }

    .paused {
        color: #ff9e00;
    }

    .stopped {
        color: var(--gray);
    }

    .instructions {
        margin-top: 30px;
        padding: 20px;
        background: #f8f9fa;
        border-radius: var(--border-radius);
    }

    .instructions h3 {
        margin-bottom: 15px;
        color: var(--dark);
    }

    .instructions ul {
        padding-left: 20px;
    }

    .instructions li {
        margin-bottom: 10px;
    }