.card {
        background: #fff;
        /* border: 1px solid #2e2e40; */
        border-radius: 16px;
        /* padding: 40px; */
        width: 100%;
        max-width: 560px;
        /* box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5); */
    }

    .drop-zone {
        border: 2px dashed #2e2e40;
        border-radius: 12px;
        padding: 38px 20px;
        text-align: center;
        cursor: pointer;
        transition: border-color 0.2s, background 0.2s;
        position: relative;
    }

  

    .drop-zone input[type="file"] {
        position: absolute;
        inset: 0;
        opacity: 0;
        cursor: pointer;
        width: 100%;
        height: 100%;
    }

    .drop-icon {
        font-size: 2.5rem;
        margin-bottom: 10px;
    }

    .drop-zone p {
        font-size: 0.9rem;
        color: #9ca3af;
    }

    .drop-zone span {
        color: var(--primary-color);
        font-weight: 600;
    }

    .file-list {
        margin-top: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .file-item {
        background: #12121a;
        border-radius: 8px;
        padding: 10px 14px;
        font-size: 0.83rem;
        color: #9ca3af;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .file-item .fname {
        flex: 1;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        color: #fed7aa;
    }

    .file-item .fsize {
        color: #4b5563;
        font-size: 0.78rem;
        white-space: nowrap;
    }

    .badge {
        font-size: 0.72rem;
        padding: 2px 9px;
        border-radius: 99px;
        white-space: nowrap;
        background: #1f2937;
        color: #6b7280;
    }

    .badge.processing {
        background: #1e1b4b;
        color: #a5b4fc;
    }

    .badge.done {
        background: #14532d;
        color: #86efac;
    }

    .badge.error {
        background: #450a0a;
        color: #fca5a5;
    }

    .options {
        display: flex;
        gap: 14px;
        margin-top: 22px;
        flex-wrap: wrap;
    }

    .option-group {
        flex: 1;
        min-width: 130px;
    }

    label {
        display: block;
        font-size: 0.76rem;
        color: #6b7280;
        margin-bottom: 6px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    select {
        width: 100%;
        background: #12121a;
        border: 1px solid #2e2e40;
        border-radius: 8px;
        color: #e2e2e2;
        padding: 8px 12px;
        font-size: 0.88rem;
        outline: none;
    }

    select:focus {
        border-color: #f97316;
    }

    input[type="range"] {
        width: 100%;
        accent-color: var(--primary-color);
        cursor: pointer;
        margin-top: 4px;
    }

    .range-val {
        font-size: 0.8rem;
        color: #fb923c;
        text-align: right;
        margin-top: 2px;
    }

    .btn-convert {
        width: 100%;
        margin-top: 24px;
        padding: 13px;
        border: none;
        border-radius: 10px;
        background: var(--primary-color);
        color: #000;
        font-size: 1rem;
        font-weight: 700;
        cursor: pointer;
        transition: opacity 0.2s, transform 0.1s;
    }

    .btn-convert:hover:not(:disabled) {
        opacity: 0.88;
        transform: translateY(-1px);
    }

    .btn-convert:disabled {
        opacity: 0.35;
        cursor: not-allowed;
    }

    .progress-wrap {
        display: none;
        margin-top: 18px;
    }

    .progress-wrap.show {
        display: block;
    }

    .progress-bar-bg {
        background: #12121a;
        border-radius: 99px;
        height: 6px;
        overflow: hidden;
    }

    .progress-bar-fill {
        height: 100%;
        background: linear-gradient(90deg, #f97316, #facc15);
        border-radius: 99px;
        width: 0%;
        transition: width 0.3s ease;
    }

    .progress-text {
        font-size: 0.8rem;
        color: #6b7280;
        margin-top: 6px;
        text-align: center;
    }

    .result-section {
        display: none;
        margin-top: 20px;
    }

    .result-section.show {
        display: block;
    }

    .result-header {
        font-size: 0.85rem;
        color: #6b7280;
        margin-bottom: 10px;
    }

    .btn-dl-all {
        width: 100%;
        padding: 11px;
        border: 1px solid #f97316;
        border-radius: 10px;
        background: transparent;
        color: #fb923c;
        font-size: 0.9rem;
        font-weight: 600;
        cursor: pointer;
        transition: background 0.2s;
    }

    .btn-dl-all:hover {
        background: rgba(249, 115, 22, 0.1);
    }

    .err {
        display: none;
        margin-top: 14px;
        padding: 10px 14px;
        background: #1a0505;
        border: 1px solid #450a0a;
        border-radius: 8px;
        font-size: 0.83rem;
        color: #fca5a5;
    }

    .err.show {
        display: block;
    }

    .note-box {
        margin-top: 20px;
        padding: 14px 16px;
        background: #1c1608;
        border: 1px solid #3b2105;
        border-radius: 10px;
        font-size: 0.8rem;
        color: #9ca3af;
        line-height: 1.8;
    }

    .note-box strong {
        color: #fb923c;
    }

    .note-box code {
        background: #12121a;
        padding: 1px 6px;
        border-radius: 4px;
        font-size: 0.79rem;
        color: #fde68a;
    }

    .method-badge {
        display: inline-block;
        font-size: 0.72rem;
        padding: 2px 8px;
        border-radius: 99px;
        background: #1e3a5f;
        color: #60a5fa;
        margin-left: 6px;
    }