.tool-audio-join {
    background: linear-gradient(160deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
}

.tool-audio-join .audio-join-wrapper {
    border: none;
    border-radius: 1rem;
    background: #ffffff;
    box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(15, 23, 42, 0.04);
    overflow: hidden;
    border-left: 4px solid #22C55E;
}

.tool-audio-join .audio-join-icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: linear-gradient(135deg, #22C55E 0%, #1F2937 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(34, 197, 94, 0.35);
}

.tool-audio-join .audio-dropzone {
    position: relative;
    border: 2px dashed #cbd5e1;
    border-radius: 0.85rem;
    background: #f8fafc;
    padding: 2rem 1.25rem;
    text-align: center;
    cursor: pointer;
}

.tool-audio-join .audio-dropzone.is-over {
    border-color: #22C55E;
    background: rgba(34, 197, 94, 0.08);
}

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

.tool-audio-join .audio-dropzone-icon {
    font-size: 2rem;
    color: #22C55E;
    margin-bottom: 0.65rem;
    display: block;
}

.join-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.join-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    border: 2px solid #e2e8f0;
    border-radius: 0.65rem;
    background: #f8fafc;
    padding: 0.55rem 0.7rem;
}

.join-item-index {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: #22C55E;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.join-item-meta {
    flex: 1;
    min-width: 0;
}

.join-item-name {
    display: block;
    font-weight: 600;
    color: #1F2937;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.join-item-time {
    display: block;
    font-size: 0.8rem;
    color: #64748b;
}

.join-item-actions {
    display: flex;
    gap: 0.3rem;
    flex-shrink: 0;
}

.tool-audio-join .btn-join-icon {
    width: 34px;
    height: 34px;
    padding: 0;
    border: 2px solid #e2e8f0;
    background: #fff;
    color: #1F2937 !important;
    border-radius: 0.4rem;
}

.tool-audio-join .btn-join-icon:hover,
.tool-audio-join .btn-join-icon:focus {
    border-color: #94a3b8;
    background: #f8fafc;
    color: #1F2937 !important;
}

.tool-audio-join .btn-join-icon:disabled {
    opacity: 0.4;
}

.tool-audio-join .btn-join-go {
    background: #22C55E;
    border: none;
    color: #fff !important;
    font-weight: 600;
    border-radius: 0.5rem;
    padding: 0.6rem 1.15rem;
}

.tool-audio-join .btn-join-go:hover,
.tool-audio-join .btn-join-go:focus {
    background: #16a34a;
    color: #fff !important;
}

.tool-audio-join .btn-join-go:disabled {
    background: #cbd5e1;
    color: #64748b !important;
}

.tool-audio-join .btn-join-preview,
.tool-audio-join .btn-join-clear {
    border: 2px solid #e2e8f0;
    background: #fff;
    color: #1F2937 !important;
    font-weight: 600;
    border-radius: 0.5rem;
    padding: 0.55rem 1rem;
}

.tool-audio-join .btn-join-preview:hover,
.tool-audio-join .btn-join-preview:focus,
.tool-audio-join .btn-join-clear:hover,
.tool-audio-join .btn-join-clear:focus {
    border-color: #94a3b8;
    background: #f8fafc;
    color: #1F2937 !important;
}

.tool-audio-join .btn-join-preview:disabled {
    opacity: 0.45;
}

@media (max-width: 575.98px) {
    .tool-audio-join .btn-join-go,
    .tool-audio-join .btn-join-preview,
    .tool-audio-join .btn-join-clear {
        width: 100%;
    }
}