body {
            margin: 0;
            overflow: hidden;
            font-family: 'Segoe UI', 'Poppins', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        /* Main Control Panel - Top Right */
        .controls-panel {
            position: fixed;
            top: 20px;
            right: 20px;
            background: rgba(75, 75, 91, 0.4);
            backdrop-filter: blur(15px);
            border-radius: 16px;
            padding: 18px 22px;
            color: white;
            z-index: 100;
            display: flex;
            gap: 18px;
            flex-direction: column;
            min-width: 220px;
            border: 1px solid rgba(255,255,255,0.15);
            box-shadow: 0 8px 32px rgba(0,0,0,0.3);
            font-family: 'Segoe UI', monospace;
            max-height: 90vh;
            overflow-y: auto;
        }
        
        .control-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        
        .control-group label {
            font-size: 11px;
            opacity: 0.7;
            letter-spacing: 1.5px;
            font-weight: 600;
            text-transform: uppercase;
        }
        
        select, button {
            background: rgba(0,0,0,0.65);
            border: 1px solid rgba(255,255,255,0.25);
            color: white;
            padding: 9px 14px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 500;
            transition: all 0.2s ease;
            font-family: inherit;
        }
        
        select:hover, button:hover {
            background: rgba(255,255,255,0.2);
            border-color: rgba(255,255,255,0.6);
            transform: translateY(-1px);
        }
        
        /* Texture Picker Circles - Top Center */
        .texture-picker {
            position: fixed;
            top: 22px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 16px;
            z-index: 100;
            background: rgba(75, 75, 91, 0.4);
            backdrop-filter: blur(10px);
            padding: 12px 28px;
            border-radius: 60px;
            border: 1px solid rgba(255,255,255,0.2);
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }
        
       .texture-circle {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1), box-shadow 0.2s;
    border: 2px solid rgba(255,255,255,0.9);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    overflow: hidden;  /*重要: 确保图片不溢出圆角边界 */
    position: relative;
    background-color: #333; /* fallback color */
}

.texture-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;  /* 让图片完全覆盖圆形区域，会裁剪多余部分 */
    object-position: center center;  /* 居中显示 */
    display: block;
}

/* Fallback for emoji/text when no image */
.texture-circle .fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: linear-gradient(135deg, #555, #333);
}
        
        .texture-circle:hover {
            transform: scale(1.15);
            box-shadow: 0 6px 20px rgba(0,0,0,0.4);
        }
        
        .texture-circle.active {
            transform: scale(1.1);
            box-shadow: 0 0 0 3px white, 0 0 0 6px rgba(255,255,255,0.3);
        }
        
        /* Color Picker - Bottom Center */
        .color-picker {
            position: fixed;
            bottom: 22px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 14px;
            z-index: 100;
            background: rgba(75, 75, 91, 0.4);
            backdrop-filter: blur(10px);
            padding: 10px 24px;
            border-radius: 60px;
            border: 1px solid rgba(255,255,255,0.2);
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }
        
        .color-circle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            cursor: pointer;
            transition: transform 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1), box-shadow 0.2s;
            border: 2px solid rgba(255,255,255,0.9);
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        
        .color-circle:hover {
            transform: scale(1.15);
            box-shadow: 0 6px 20px rgba(0,0,0,0.4);
        }
        
        .color-circle.active {
            transform: scale(1.1);
            box-shadow: 0 0 0 3px white, 0 0 0 6px rgba(255,255,255,0.3);
        }
        
        /* Gizmo Navigation - Left Side */
        .gizmo-panel {
            position: fixed;
            left: 25px;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            flex-direction: column;
            gap: 14px;
            z-index: 100;
            background: rgba(75, 75, 91, 0.4);
            backdrop-filter: blur(10px);
            padding: 18px 12px;
            border-radius: 60px;
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .gizmo-btn {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: rgba(0,0,0,0.75);
            border: 1px solid rgba(255,255,255,0.35);
            color: white;
            font-size: 12px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: monospace;
            font-weight: 700;
        }
        
        .gizmo-btn:hover {
            background: #ff5500;
            transform: scale(1.08);
            border-color: white;
        }
        
        .loading-overlay {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(8px);
            padding: 8px 16px;
            border-radius: 20px;
            color: #00ff88;
            font-family: monospace;
            font-size: 12px;
            z-index: 100;
            pointer-events: none;
            letter-spacing: 1px;
        }
        
        .info {
            position: fixed;
            top: 20px;
            left: 20px;
            background: rgba(0,0,0,0.55);
            backdrop-filter: blur(5px);
            color: rgba(255,255,255,0.9);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 11px;
            font-family: monospace;
            z-index: 100;
            pointer-events: none;
        }
        /* ========== MOBILE RESPONSIVE STYLES ========== */
/* ========== BASE STYLES (Desktop First) ========== */
.texture-picker {
    position: fixed;
    top: 22px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: row;
    gap: 16px;
    z-index: 100;
    background: rgba(20, 20, 30, 0.9);
    backdrop-filter: blur(10px);
    padding: 12px 28px;
    border-radius: 60px;
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.texture-circle {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1), box-shadow 0.2s;
    border: 2px solid rgba(255,255,255,0.9);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    overflow: hidden;
    position: relative;
    background-color: #2a2a2a;
    flex-shrink: 0;
}

.texture-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    display: block;
    pointer-events: none;
}

/* Color Picker - Bottom Center (Desktop) */
.color-picker {
    position: fixed;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: row;
    gap: 14px;
    z-index: 100;
    background: rgba(20, 20, 30, 0.9);
    backdrop-filter: blur(10px);
    padding: 10px 24px;
    border-radius: 60px;
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.color-circle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1), box-shadow 0.2s;
    border: 2px solid rgba(255,255,255,0.9);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

/* Gizmo Panel - Left Side (Desktop) */
.gizmo-panel {
    position: fixed;
    left: 25px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 14px;
    z-index: 100;
    background: rgba(20, 20, 30, 0.85);
    backdrop-filter: blur(10px);
    padding: 18px 12px;
    border-radius: 60px;
    border: 1px solid rgba(255,255,255,0.2);
}

.gizmo-btn {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: rgba(0,0,0,0.75);
    border: 1px solid rgba(255,255,255,0.35);
    color: white;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: monospace;
    font-weight: 700;
}

/* ========== MOBILE STYLES (max-width: 768px) ========== */
@media (max-width: 768px) {
    /* Texture Picker - VERTICAL on RIGHT side */
    .texture-picker {
        position: fixed;
        top: 50%;
        left: auto;
        right: 15px;
        transform: translateY(-50%);
        flex-direction: column;
        padding: 12px 12px;
        gap: 12px;
        border-radius: 40px;
    }
    
    .texture-circle {
        width: 50px;
        height: 50px;
    }
    
    /* Color Picker - stays HORIZONTAL at bottom */
    .color-picker {
        bottom: 15px;
        padding: 8px 16px;
        gap: 10px;
    }
    
    .color-circle {
        width: 36px;
        height: 36px;
    }
    
    /* Gizmo Panel - VERTICAL on LEFT side */
    .gizmo-panel {
        left: 15px;
        padding: 12px 8px;
        gap: 10px;
    }
    
    .gizmo-btn {
        width: 44px;
        height: 44px;
        font-size: 10px;
    }
    
    /* Controls Panel - Top Right */
    .controls-panel {
        top: 12px;
        right: 12px;
        padding: 12px 16px;
        min-width: 160px;
        gap: 12px;
        max-height: 80vh;
    }
    
    .control-group label {
        font-size: 9px;
    }
    
    select, button {
        padding: 6px 10px;
        font-size: 11px;
    }
    
    /* Info text */
    .info {
        top: auto;
        bottom: 10px;
        left: 10px;
        font-size: 9px;
    }
    
    .loading-overlay {
        bottom: 10px;
        right: 10px;
        font-size: 10px;
    }
}

/* ========== SMALL PHONES (max-width: 480px) ========== */
@media (max-width: 480px) {
    .texture-circle {
        width: 42px;
        height: 42px;
    }
    
    .gizmo-btn {
        width: 38px;
        height: 38px;
        font-size: 9px;
    }
    
    .color-circle {
        width: 32px;
        height: 32px;
    }
    
    .controls-panel {
        max-height: 60vh;
        min-width: 140px;
        padding: 10px 12px;
    }
    
    .texture-picker {
        padding: 10px 10px;
        gap: 10px;
    }
    
    .gizmo-panel {
        padding: 10px 6px;
        gap: 8px;
    }
}
        
        .controls-panel::-webkit-scrollbar {
            width: 5px;
        }
        
        .controls-panel::-webkit-scrollbar-track {
            background: rgba(255,255,255,0.1);
            border-radius: 10px;
        }
        
        .controls-panel::-webkit-scrollbar-thumb {
            background: rgba(255,255,255,0.3);
            border-radius: 10px;
        }