.matrix-theme {
    max-width: 780px;
    margin: 40px auto;
    padding: 30px;
    background: #050505;
    color: #00ff66;
    font-family: 'Courier New', Courier, monospace;
    border-radius: 6px;
    border: 2px solid #00ff66;
    box-shadow: 0 0 25px rgba(0, 255, 102, 0.2);
}

.matrix-theme h2 {
    text-align: center;
    margin-bottom: 5px;
    color: #00ff66;
    text-shadow: 0 0 10px rgba(0, 255, 102, 0.6);
    letter-spacing: 2px;
}

.matrix-theme .tagline {
    text-align: center;
    color: #008833;
    font-size: 13px;
    margin-bottom: 25px;
}

.matrix-theme .upload-box {
    border: 2px dashed #00ff66;
    padding: 25px;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    background: #0a0a0a;
    transition: 0.3s ease;
}

.matrix-theme .upload-box:hover {
    background: #112211;
    box-shadow: inset 0 0 15px rgba(0, 255, 102, 0.3);
}

.matrix-theme .upload-box p {
    margin: 0;
    color: #00ff66;
    font-weight: bold;
    font-size: 14px;
}

.matrix-theme .upload-box input {
    display: none;
}

.control-panel {
    display: none;
    margin-top: 15px;
    padding: 15px;
    background: #0a0a0a;
    border: 1px solid #00ff66;
    border-radius: 4px;
    font-size: 13px;
}

.control-group {
    margin-bottom: 10px;
}

.control-group label {
    display: block;
    margin-bottom: 5px;
    color: #00ffcc;
}

.control-group input[type="range"] {
    width: 100%;
    accent-color: #00ff66;
    background: #000;
}

.control-group button {
    background: #000;
    color: #00ff66;
    border: 1px solid #00ff66;
    padding: 8px 12px;
    cursor: pointer;
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    border-radius: 3px;
    transition: 0.3s;
}

.control-group button:hover {
    background: #00ff66;
    color: #000;
}

.matrix-theme #jkstarrViewerContainer {
    width: 100%;
    height: 400px;
    background: #000000;
    margin-top: 15px;
    border-radius: 4px;
    display: none;
    position: relative;
    border: 1px solid #00ff66;
    box-shadow: inset 0 0 20px rgba(0, 255, 102, 0.15);
}

.button-row {
    display: flex;
    gap: 8px;
    margin-top: 15px;
    display: none;
}

.matrix-theme .btn-download {
    flex: 1;
    padding: 12px 5px;
    background: #00ff66;
    color: #000;
    font-weight: bold;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    font-family: 'Courier New', Courier, monospace;
    letter-spacing: 1px;
    transition: 0.3s;
}

.matrix-theme .btn-download.obj-btn {
    background: #00b38f;
}

.matrix-theme .btn-download.normal-btn {
    background: #9900ff;
    color: #fff;
}

.matrix-theme .btn-download:hover {
    opacity: 0.85;
    box-shadow: 0 0 15px rgba(0, 255, 102, 0.8);
}

.matrix-theme .loader {
    text-align: center;
    margin-top: 20px;
    color: #00ffcc;
    font-size: 14px;
    display: none;
}