.converter-container {
    max-width: 700px;
    margin: 40px auto 50px;
    padding: 30px;
    background: #ffffff;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    color: #333;
    box-sizing: border-box;
}

.converter-title {
    text-align: center;
    margin-bottom: 15px;
    font-size: 27px;
    font-weight: 500;
    margin-top: 0;
}

.progress-view {
    padding: 20px 0;
}

.progress-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.progress-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid #f0f0f0;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 15px;
}

.progress-container {
    flex-grow: 1;
    height: 20px;
    background-color: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar-inner {
    height: 100%;
    width: 0%;
    background-color: #3498db;
    transition: width 0.2s ease-in-out;
    border-radius: 10px;
}

.progress-percentage-text {
    font-weight: 500;
    margin-left: 15px;
    color: #2c3e50;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.upload-section.drag-over {
    border-color: #2a73d9;
    background: #f1f3ff;
}

.drop-text {
    font-size: 17px;
    margin-bottom: 0;
    margin-top: 10px;
    font-weight: 500;
    text-align: center;
}

.upload-section {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 25px;
    border: 2px dashed #ced4da;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-input {
    display: none;
}

.file-input:hover {
    background-color: #f8f9fa;
    border-color: #adb5bd;
}

.drop-or {
    margin-bottom: 15px;
    margin-top: 5px;
    font-size: 17px;
    text-align: center;
}

.upload-btn {
    padding: 9px 13px;
    background-color: #0073e6;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s;
}

.upload-btn:hover,
.upload-btn:focus {
    background-color: #0073e6;
    /* Keep original color on hover/focus */
}

.upload-btn:active {
    background-color: #0073e6;
    transform: scale(0.97);
}

.file-input:hover {
    background-color: #f8f9fa;
    border-color: #adb5bd;
}

.file-input::file-selector-button {
    background-color: #e9ecef;
    color: #495057;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    margin-right: 10px;
    transition: background-color 0.3s;
}

.file-input::file-selector-button:hover {
    background-color: #dee2e6;
}

.controls-section {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
}

.convert-btn,
.download-btn,
.clear-btn,
.back-btn {
    padding: 9px 13px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.convert-btn:active,
.download-btn:active,
.clear-btn:active,
.back-btn:active {
    transform: scale(0.97);
    transition: transform 0.1s ease;
}

.convert-btn {
    background-color: #188932;
    color: white;
}

.convert-btn:hover {
    background-color: #218838;
}

.convert-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.clear-btn {
    background-color: #dc3545;
    color: white;
}

.clear-btn:hover,
.clear-btn:focus,
.clear-btn:active {
    background-color: #dc3545;
}

.download-btn {
    background-color: #a8680f;
    color: white;
}

.download-btn:hover,
.download-btn:focus,
.download-btn:active {
    background-color: #a8680f;
}

.back-btn {
    background-color: #6c757d;
    color: white;
}

.back-btn:hover,
.back-btn:focus,
.back-btn:active {
    background-color: #6c757d;
}

.download-btn .btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    margin-left: 10px;
}

.download-btn.is-downloading .btn-spinner {
    display: inline-block;
    animation: spin 1s linear infinite;
}

.result-section {
    padding: 10px;
    text-align: center;
}

.success-icon {
    width: 50px;
    height: 50px;
    color: #28a745;
    /* Match the green convert button color */
    margin-bottom: 0;
}

.result-message {
    font-size: 1.2rem;
    font-weight: 500;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 15px;
    margin-top: 0;
}

.success-view {
    display: none;
    /* Will be flex when shown */
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.clear-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.status-title {
    margin-bottom: 15px;
    font-weight: 500;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
}

.animated-loading-text {
    text-align: center;
    font-size: 17px;
    color: #5a6a7a;
}

.conversion-counter {
    text-align: center;
    font-size: 17px;
    color: #555;
    font-weight: 500;
    margin-top: 10px;
    margin-bottom: 5px;
    height: 1.2em;
}

.wait-message {
    text-align: center;
    font-style: italic;
    font-size: 17px;
    color: #888;
    margin-top: 10px;
    height: 1.2em;
    /* Prevent layout shift */
}

.converter-hidden {
    display: none;
}

.options-section {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 10px 15px;
    margin-bottom: 15px;
    border: 1px solid #e9ecef;
}

.options-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.options-header:focus-visible {
    outline: 2px solid #80bdff;
    outline-offset: 2px;
    border-radius: 4px;
}

.options-title {
    margin: 0;
    font-size: 17px;
    font-weight: 500;
}

.options-toggle-icon {
    transition: transform 0.3s ease;
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 24 24' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 9L12 15L18 9' stroke='%23555' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    transform: rotate(0deg);
    /* Point down by default */
}

.options-section:not(.collapsed) .options-toggle-icon {
    transform: rotate(180deg);
    /* Point up when expanded */
}

.options-content {
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding-top 0.4s ease-out, margin-top 0.4s ease-out;
    max-height: 1000px;
    /* Large enough value */
    padding-top: 20px;
    margin-top: 10px;
    border-top: 1px solid #e9ecef;
}

.options-section.collapsed .options-content {
    max-height: 0;
    padding-top: 0;
    margin-top: 0;
    border-top: none;
}

.option-item {
    display: flex;
    flex-direction: column;
}

.option-label {
    margin-bottom: 15px;
    font-weight: 500;
    font-size: 16px;
    display: flex;
    align-items: center;
}

.quality-control-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.quality-control-group .option-label {
    margin-bottom: 0;
    flex-shrink: 0;
}

.volume-control-group {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.volume-control-group .option-label {
    margin-bottom: 0;
    /* Override default margin */
    flex-shrink: 0;
}

.volume-slider {
    cursor: pointer;
}

.volume-percentage {
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 5px;
}

.option-item {
    margin-bottom: 15px;
}

.option-item:last-child {
    margin-bottom: 0;
}

.sub-option-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
    padding-left: 2px;
    margin-bottom: 5px;
}

.options-section input[type="checkbox"] {
    transform: scale(1.2);
    cursor: pointer;
}

.converter-container .duration-input {
    width: 70px;
    padding: 5px 8px;
    border-radius: 5px;
    border: 1px solid #ced4da;
    background-color: #ffffff;
    color: #495057;
    font-size: 16px;
}

.duration-input:disabled {
    background-color: rgba(0, 0, 0, 0.1);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Hide spinners from number input */
.duration-input,
.metadata-input-group input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

.duration-input::-webkit-outer-spin-button,
.duration-input::-webkit-inner-spin-button,
.metadata-input-group input[type="number"]::-webkit-outer-spin-button,
.metadata-input-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.sub-option-group label {
    font-weight: 500;
    font-size: 16px;
}

.quality-select {
    padding: 8px 12px;
    border-radius: 5px;
    border: 1px solid #ced4da;
    background-color: #ffffff;
    color: #495057;
    font-size: 1rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 8L10 12L14 8' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 4px center;
    background-size: 20px 20px;
    padding-right: 40px;
}

.metadata-section {
    padding-top: 5px;
    margin-top: 15px;
}

.metadata-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.metadata-input-group {
    display: flex;
    flex-direction: column;
}

.metadata-input-group label {
    font-weight: 500;
    font-size: 15px;
    margin-bottom: 5px;
}

.converter-container .metadata-input-group input[type="text"],
.converter-container .metadata-input-group input[type="number"],
.converter-container .metadata-input-group textarea {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    background-color: #ffffff;
    border: 1px solid #ced4da;
    font-size: 15px;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.metadata-input-group textarea {
    resize: vertical;
    min-height: 60px;
    /* Optional: set a minimum height */
}

.metadata-input-group input[type="text"]:hover,
.metadata-input-group input[type="number"]:hover,
.metadata-input-group textarea:hover,
.metadata-input-group input[type="text"]:focus,
.metadata-input-group input[type="number"]:focus,
.metadata-input-group textarea:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 1px rgba(0, 123, 255, 0.25);
    outline: none;
}

.converter-container input[type="number"],
.converter-container select {
    background-color: #ffffff;
    border-radius: 5px;
    border: 1px solid #ced4da;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.converter-container input[type="number"]:hover,
.converter-container select:hover,
.converter-container input[type="number"]:focus,
.converter-container select:focus,
.converter-container input[type="number"]:active,
.converter-container select:active {
    background-color: #ffffff;
    border-color: #80bdff;
    box-shadow: 0 0 0 1px rgba(0, 123, 255, 0.25);
    outline: none;
}

.converter-container button:focus,
.converter-container button:active {
    outline: none;
    box-shadow: none;
}

.file-list-container {
    margin-bottom: 25px;
}

.file-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 15px;
    border-bottom: 1px solid #f0f0f0;
    background-color: #fff;
}

.file-item:last-child {
    border-bottom: none;
}

.file-item-info {
    flex-grow: 1;
    min-width: 0;
}

.file-item-name {
    font-weight: 500;
    font-size: 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
}

.file-item-meta {
    font-size: 14px;
    color: #525a5b;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-item-size {
    border-left: 1px solid #ccc;
    padding-left: 12px;
}

.file-item-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-item-progress-bar {
    width: 100%;
    height: 6px;
    background-color: #e9ecef;
    border-radius: 3px;
    margin-top: 8px;
    overflow: hidden;
}

.file-item-progress-fill {
    height: 100%;
    background-color: #4cd964;
    width: 0%;
    transition: width 0.3s ease;
}

.converter-container .item-remove-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: #adb5bd;
    padding: 0;
    transition: color 0.2s ease;
}

.item-remove-btn:active {
    transform: scale(0.90);
}

.item-remove-btn:hover {
    color: #e74c3c;
}

.faq-list {
    margin-top: 1rem;
}

.faq-list dt {
    font-weight: 500;
    font-size: 1.1em;
}

.faq-list dd {
    margin-left: 0;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    padding-left: 1rem;
    padding-bottom: 10px;
    border-bottom: 1px dashed #ddd;
}

@media (max-width: 768px) {
    .converter-container {
        margin-bottom: 60px;
        padding: 15px 0;
        border-radius: 0;
        box-shadow: none;
        border-top: 1px solid #e9e9e9;
        border-bottom: 1px solid #e9e9e9;
    }

    .metadata-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .quality-control-group,
    .volume-control-group {
        flex-wrap: wrap;
    }

    .volume-control-group .option-label {
        width: 100%;
        margin-bottom: 0;
    }

    .volume-control-group .volume-slider {
        flex-grow: 1;
    }
    
    .volume-control-group {
        gap: 0;
    }
    
    .quality-control-group {
        gap: 4px;
    }

    .result-section {
        padding: 10px 0;
    }

    .options-section {
        padding: 10px;
    }

    .file-item {
        gap: 10px;
    }

}