*{margin:0;padding:0;box-sizing:border-box}main{flex:1;padding:20px}main.container{display:block;max-width:1400px;width:100%;margin:0 auto;padding:40px 20px;background-color:var(--primary-bg-color);border-radius:12px;box-shadow:0 8px 25px rgba(0,0,0,0.1)}main h1{color:var(--primary-text-color);font-size:2.5rem;margin-bottom:10px;text-align:center}main .subtitle{color:var(--secondary-text-color);text-align:center;margin-bottom:30px;font-size:1.1rem}main h3{color:var(--primary-text-color);font-size:1.1rem;margin-bottom:15px}.tool-layout{display:grid;grid-template-columns:1fr 1fr;gap:30px}.upload-section,.preview-section{background:var(--input-bg-color);padding:25px;border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,0.1);border:1px solid var(--input-border-color)}.upload-area{border:2px dashed var(--input-border-color);border-radius:8px;padding:40px;text-align:center;cursor:pointer;transition:all 0.3s;background:var(--header-bg-color);margin-bottom:20px}.upload-area:hover{border-color:var(--button-bg-color)}.upload-area svg{stroke:var(--secondary-text-color);margin-bottom:15px}.upload-area h3{margin-bottom:10px}.upload-area p{color:var(--secondary-text-color);font-size:0.9rem}.color-display{background:var(--header-bg-color);padding:20px;border-radius:8px;border:1px solid var(--input-border-color);margin-bottom:20px}.color-swatch{width:100%;height:100px;border-radius:8px;margin-bottom:15px;border:2px solid var(--input-border-color)}.color-values{display:flex;flex-direction:column;gap:10px}.value-row{display:flex;align-items:center;gap:10px;padding:10px;background:var(--input-bg-color);border-radius:6px}.value-label{color:var(--secondary-text-color);font-weight:600;min-width:50px}.value-text{flex:1;color:var(--primary-text-color);font-family:monospace}.copy-btn{padding:6px 12px;background:var(--button-bg-color);color:var(--button-text-color);border:none;border-radius:4px;cursor:pointer;font-size:0.85rem;transition:all 0.2s}.copy-btn:hover{background:var(--button-hover-bg-color)}.palette-section{background:var(--header-bg-color);padding:20px;border-radius:8px;border:1px solid var(--input-border-color)}.palette-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.palette-swatch{width:100%;padding-top:100%;border-radius:6px;cursor:pointer;transition:all 0.2s;border:2px solid var(--input-border-color)}.palette-swatch:hover{transform:scale(1.1);box-shadow:0 4px 12px rgba(0,0,0,0.2)}.preview-container{min-height:400px;background:var(--header-bg-color);border:2px dashed var(--input-border-color);border-radius:8px;display:flex;align-items:center;justify-content:center;padding:20px;margin-bottom:20px;overflow:hidden}.preview-container canvas{max-width:100%;max-height:500px;cursor:crosshair;object-fit:contain}.placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:15px;color:var(--secondary-text-color);text-align:center}.placeholder svg{stroke:var(--secondary-text-color);opacity:0.5}.info-box{display:flex;gap:12px;padding:16px;background:var(--input-bg-color);border-radius:12px;font-size:0.9rem;color:var(--primary-text-color);box-shadow:0 4px 15px rgba(0,0,0,0.1);border:1px solid var(--input-border-color)}.info-box svg{flex-shrink:0;stroke:var(--button-bg-color)}.info-box strong{color:var(--button-bg-color)}.hidden{display:none!important}@media(max-width:1024px){.tool-layout{grid-template-columns:1fr}}@media(max-width:600px){main h1{font-size:2rem}main .subtitle{font-size:1rem}.palette-grid{grid-template-columns:repeat(4,1fr)}}