* { margin: 0; padding: 0; box-sizing: border-box; }
        html {
            min-width: 1920px;
            overflow-x: auto;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #333;
            min-height: 100vh;
            padding: 20px;
            color: #fff;
            min-width: 1920px;
        }
        .container { width: 1920px; margin: 0 auto; overflow-x: auto; }
        h1 {
            text-align: center;
            margin-bottom: 30px;
            font-size: 2.5rem;
            background: linear-gradient(90deg, #ff0000, #ff6b00, #ff0000);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-layout {
            display: grid;
            grid-template-columns: 1280px 580px;
            gap: 20px;
            align-items: start;
        }
        @media (max-width: 1950px) {
            .main-layout { grid-template-columns: 1fr; }
        }
        .panel {
            background: rgba(255,255,255,0.05);
            border-radius: 0;
            padding: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.1);
            overflow: visible;
        }
        .thumbnail-panel {
            width: 1280px;
        }
        .thumbnail-container {
            position: relative;
            width: 1280px;
            height: 720px;
            max-width: 100%;
            background: #000;
            border-radius: 0;
            overflow: hidden;
            box-shadow: 0 10px 40px rgba(0,0,0,0.5);
        }
        #thumbnail { width: 100%; height: 100%; object-fit: cover; }
        .thumbnail-overlay {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
        }
        .text-layer {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            width: auto;
            max-width: 100%;
            color: #fff;
            text-shadow: none;
            transition: all 0.3s ease;
            word-wrap: break-word;
            padding: 0;
            font-size: clamp(1.5rem, 4vw, 3.5rem);
            font-weight: 900;
            letter-spacing: 2px;
            cursor: move;
        }
        .text-layer.uppercase {
            text-transform: uppercase;
        }
        .text-layer.lowercase {
            text-transform: lowercase;
        }
        .side-panel { display: flex; flex-direction: column; gap: 20px; }
        .form-group { margin-bottom: 15px; }
        label { display: block; margin-bottom: 5px; font-weight: 600; color: #ccc; font-size: 0.9rem; }
        input, select, textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid rgba(255,255,255,0.2);
            border-radius: 0;
            background: rgba(0,0,0,0.3);
            color: #fff;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        input:focus, select:focus, textarea:focus { outline: none; border-color: #ff0000; }
        textarea { resize: vertical; min-height: 80px; }
        .btn {
            width: 100%;
            padding: 15px;
            border: none;
            border-radius: 0;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .btn-primary {
            background: linear-gradient(135deg, #ff0000, #cc0000);
            color: #fff;
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 5px 20px rgba(255,0,0,0.4); }
        .btn-primary:disabled { background: #555; cursor: not-allowed; transform: none; }
        .font-select { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
        .font-option {
            padding: 8px;
            background: rgba(0,0,0,0.3);
            border: 2px solid transparent;
            border-radius: 0;
            color: #fff;
            cursor: pointer;
            text-align: center;
            font-size: 0.85rem;
            transition: all 0.2s;
        }
        .font-option:hover { border-color: rgba(255,255,255,0.3); }
        .font-option.selected { border-color: #ff0000; background: rgba(255,0,0,0.2); }
        .design-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
        .design-option {
            padding: 10px 5px;
            background: rgba(0,0,0,0.3);
            border: 2px solid transparent;
            border-radius: 0;
            color: #fff;
            cursor: pointer;
            text-align: center;
            font-size: 0.75rem;
            transition: all 0.2s;
        }
        .design-option:hover { border-color: rgba(255,255,255,0.3); }
        .design-option.selected { border-color: #ff0000; background: rgba(255,0,0,0.2); }
        .design-preview { height: 30px; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 5px; }
        .design-solid { color: #fff; text-shadow: 3px 3px 6px rgba(0,0,0,0.9); }
        .design-outlined { color: transparent; -webkit-text-stroke: 2px #fff; text-shadow: none; }
        .design-shadow { color: #222; text-shadow: 4px 4px 0 #fff, -2px -2px 0 #ff0, 2px -2px 0 #f0f; }
        .design-gradient {
            background: linear-gradient(180deg, #fff 0%, #ff0 50%, #f00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(3px 3px 3px rgba(0,0,0,0.8));
        }
        .design-neon { color: #0ff; text-shadow: 0 0 10px #0ff, 0 0 20px #0ff, 0 0 30px #00f; }
        .design-fire {
            background: linear-gradient(180deg, #fff 0%, #ff0 30%, #f80 60%, #f00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(0 0 10px rgba(255,100,0,0.8));
        }
        .design-glow { color: #fff; text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 40px #fff; }
        .design-inside {
            color: rgba(0,0,0,0.9);
            text-shadow: -3px -3px 0 #fff, 3px -3px 0 #fff, -3px 3px 0 #fff, 3px 3px 0 #fff, 0 0 20px rgba(0,0,0,0.8);
        }
        .design-mirror {
            background: linear-gradient(180deg, #fff 0%, #888 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(3px 3px 3px rgba(0,0,0,0.8));
            transform: scaleY(-1);
            opacity: 0.5;
        }
        .loading {
            position: absolute;
            top: 50%; left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0,0,0,0.8);
            padding: 20px 40px;
            border-radius: 0;
            display: none;
        }
        .loading.show { display: block; }
        .spinner {
            width: 40px; height: 40px;
            border: 4px solid rgba(255,255,255,0.2);
            border-top-color: #fff;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 10px;
        }
        @keyframes spin { to { transform: rotate(360deg); } }
        .download-btn { background: linear-gradient(135deg, #28a745, #20c997); color: #fff; margin-top: 10px; }
        .download-btn:hover { transform: translateY(-2px); box-shadow: 0 5px 20px rgba(40,167,69,0.4); }
        .font-preview { display: block; margin-top: 5px; color: #888; font-size: 0.8rem; }
        .collapsible {
            margin-bottom: 10px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        .collapsible-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 15px;
            background: rgba(0,0,0,0.3);
            cursor: pointer;
            user-select: none;
            transition: background 0.2s;
        }
        .collapsible-header:hover { background: rgba(255,255,255,0.05); }
        .collapsible-header h3 { margin: 0; font-size: 1rem; color: #fff; }
        .collapsible-arrow {
            width: 0; height: 0;
            border-left: 6px solid transparent;
            border-right: 6px solid transparent;
            border-top: 8px solid #888;
            transition: transform 0.3s;
        }
        .collapsible.open .collapsible-arrow { transform: rotate(180deg); }
        .collapsible-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: rgba(0,0,0,0.2);
        }
        .collapsible.open .collapsible-content { max-height: 400px; overflow-y: auto; }
        .collapsible-inner { padding: 15px; }
        .api-section {
            background: rgba(255,0,0,0.1);
            border: 1px solid rgba(255,0,0,0.3);
            border-radius: 0;
            padding: 15px;
            margin-bottom: 15px;
        }
        .api-section h3 { color: #ff6b6b; margin-bottom: 10px; font-size: 1rem; }
        .api-note { font-size: 0.8rem; color: #888; margin-top: 8px; }
        #imagePreview { width: 100%; height: 100%; object-fit: cover; }
        .scale-btn {
            flex: 1;
            padding: 8px;
            background: rgba(0,0,0,0.3);
            border: 2px solid rgba(255,255,255,0.2);
            border-radius: 4px;
            color: #888;
            cursor: pointer;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all 0.2s;
        }
        .scale-btn:hover { border-color: rgba(255,255,255,0.4); color: #fff; }
        .scale-btn.active { border-color: #ff0000; background: rgba(255,0,0,0.2); color: #fff; }
        #scalerWrapper { transform-origin: top left; }
        .add-text-btn {
            width: 100%;
            padding: 10px;
            background: rgba(0,255,100,0.15);
            border: 2px dashed rgba(0,255,100,0.4);
            border-radius: 4px;
            color: #0f6;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 700;
            transition: all 0.2s;
            margin-bottom: 10px;
            text-align: center;
        }
        .add-text-btn:hover {
            background: rgba(0,255,100,0.25);
            border-color: rgba(0,255,100,0.6);
        }
        .layer-delete-btn {
            padding: 4px 10px;
            background: rgba(255,0,0,0.2);
            border: 1px solid #ff0000;
            border-radius: 4px;
            color: #ff6666;
            cursor: pointer;
            font-size: 0.75rem;
            font-weight: 700;
            transition: all 0.2s;
            margin-left: auto;
        }
        .layer-delete-btn:hover {
            background: rgba(255,0,0,0.4);
        }
        .layer-header-label {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            min-width: 0;
        }
        .layer-header-label .layer-name {
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 120px;
            font-size: 0.85rem;
        }