:root{--primary-color:#ff6b6b;--secondary-color:#4ecdc4;--dark-color:#2c3e50;--light-color:#f7f9fc;--text-color:#333;--white:#fff;--border-radius:12px;--shadow:0 4px 6px #0000001a;--header-bg:var(--white);--card-bg:var(--white);--body-bg:var(--light-color);--category-header-bg:#fff;--category-border:#eee}[data-theme=dark]{--primary-color:#ff8e8e;--secondary-color:#66e0d9;--dark-color:#f7f9fc;--light-color:#1a1a1a;--text-color:#e0e0e0;--white:#121212;--shadow:0 4px 15px #00000080;--header-bg:#1e1e1e;--card-bg:#2d2d2d;--body-bg:#121212;--category-header-bg:#2d2d2d;--category-border:#444}body{background-color:var(--body-bg);color:var(--text-color);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;transition:background-color .3s,color .3s}.container{max-width:800px;margin:0 auto;padding:15px}@media (min-width:768px){.container{padding:20px}}.header{background-color:var(--header-bg);box-shadow:var(--shadow);z-index:100;justify-content:center;align-items:center;padding:15px 20px;transition:background-color .3s;display:flex;position:sticky;top:0}.header h1{color:var(--dark-color);margin:0;font-size:1.2rem;font-weight:700}@media (min-width:768px){.header h1{font-size:1.5rem}}.card{background:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow);cursor:pointer;margin-bottom:20px;transition:transform .2s,background-color .3s;overflow:hidden}.card:hover{transform:translateY(-5px)}.card-img{object-fit:cover;width:100%;height:200px}.card-content{padding:15px}.card-title{color:var(--dark-color);margin:0 0 10px;font-size:1.2rem}.card-price{color:var(--primary-color);font-size:1.1rem;font-weight:700}.btn{background-color:var(--primary-color);color:#fff;text-align:center;cursor:pointer;box-sizing:border-box;border:none;border-radius:25px;width:100%;padding:12px 24px;font-weight:700;text-decoration:none;display:inline-block}.btn-secondary{background-color:var(--secondary-color)}.back-btn{color:var(--dark-color);cursor:pointer;background:0 0;border:none;font-size:1.5rem;position:absolute;left:20px}model-viewer{border-radius:var(--border-radius);background-color:#f0f0f0;width:100%;height:60vh}@media (min-width:768px){model-viewer{height:400px}}.ar-instructions{text-align:center;color:#666;margin-top:10px;font-size:.9rem}.scan-page{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;padding:20px}.scan-header{text-align:center;color:#fff;margin-bottom:20px}.scan-header h1{margin:0;font-size:2rem}.scan-price{margin-top:5px;font-size:1.5rem;font-weight:700}.scan-info{background:#fff;border-radius:12px;margin-top:20px;padding:20px;box-shadow:0 4px 15px #0003}.scan-loading,.scan-error{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);flex-direction:column;justify-content:center;align-items:center;min-height:100vh;display:flex}.spinner{border:4px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:50px;height:50px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.theme-toggle{cursor:pointer;color:var(--dark-color);background:0 0;border:none;font-size:1.5rem;transition:transform .2s;position:absolute;right:20px}.theme-toggle:active{transform:scale(.9)}@media (max-width:480px){.card-title{font-size:.95rem}.card-price{font-size:1rem}.btn{padding:10px 20px;font-size:.9rem}.header{padding:12px 15px}}