:root{--bg-body: #121418;--bg-card: #1E2229;--bg-hover: #2A303C;--text-main: #F7FAFC;--text-muted: #e7f1ff;--primary: #C5A47E;--primary-hover: #D4B48F;--primary-active: #B08E65;--primary-text: #1a202c;--secondary: #4A5568;--accent: #E53E3E;--success: #48BB78;--border-color: #2D3748;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .3);--transition: all .2s ease-in-out}body{background-color:var(--bg-body);color:var(--text-main);font-family:Noto Sans TC,system-ui,-apple-system,sans-serif;line-height:1.6;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;color:var(--text-main);letter-spacing:.5px}a{text-decoration:none;transition:var(--transition)}.navbar-custom{font-family:LXGW WenKai TC,Noto Sans TC,system-ui,-apple-system,sans-serif;font-size:1.1rem;background-color:#1e2229f2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);padding:.2rem 1rem;box-shadow:var(--shadow-sm)}.navbar-brand{font-family:LXGW WenKai TC,Noto Sans TC,system-ui,-apple-system,sans-serif;font-size:1.5rem;font-weight:800;color:var(--primary)!important;letter-spacing:1px}.nav-link{color:var(--text-muted)!important;font-weight:500;margin:0 .5rem;position:relative;transition:var(--transition)}.nav-link:hover,.nav-link.active{color:var(--primary)!important}#login-section{max-width:450px;margin:80px auto;padding:60px 20px;background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);text-align:center}.login-title{font-family:LXGW WenKai TC,Noto Sans TC,system-ui,-apple-system,sans-serif;color:var(--primary)!important;font-size:2rem;margin-bottom:20px}.login-subtitle{color:var(--text-muted);font-size:.95rem;margin-bottom:40px}.card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);color:var(--text-main);transition:var(--transition);overflow:hidden}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary)}.card-title{color:var(--primary);font-weight:700;font-size:1.25rem;margin-bottom:1rem}.card-text{color:var(--text-muted);font-size:.95rem;line-height:1.6}.btn{border-radius:var(--radius-sm);padding:.6rem;font-weight:600;letter-spacing:.5px;transition:var(--transition);border:none}.btn-primary{background-color:var(--primary);color:var(--primary-text)}.btn-primary:hover{background-color:var(--primary-hover);color:var(--primary-text);transform:translateY(-1px);box-shadow:0 4px 12px #c5a47e4d}.btn-dark{background-color:var(--bg-hover);border:1px solid var(--border-color);color:var(--text-main)}.btn-dark:hover{background-color:var(--border-color);border-color:var(--primary)}.btn-login-google{background-color:#fff;color:#333;border:1px solid #ddd;border-radius:50px;padding:12px 30px;display:inline-flex;align-items:center;gap:12px;font-size:1rem;font-weight:700;transition:var(--transition)}.btn-login-google:hover{background-color:#f7f7f7;color:#333;transform:scale(1.02);box-shadow:0 4px 12px #ffffff1a}.btn-login-google img{height:24px;width:auto;object-fit:contain}.product-card{height:100%;display:flex;flex-direction:column}.card-img-container{width:100%;height:220px;overflow:hidden;background-color:var(--bg-hover);border-radius:var(--radius-md) var(--radius-md) 0 0;position:relative}.card-img-container img{width:100%;height:100%;object-fit:contain;object-position:center;transition:transform .4s ease}.card:hover .card-img-container img{transform:scale(1.05)}.preview-img{width:100px;height:100px;object-fit:cover;margin:5px;border:2px solid var(--border-color);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm)}.price-text{font-size:1.3rem;color:var(--accent);font-weight:700}.result-box{background-color:#c5a47e0d;border:1px dashed var(--primary);padding:24px;border-radius:var(--radius-md);margin-top:20px}.result-box h4{color:var(--primary);font-size:1.2rem;margin-bottom:1rem}.badge{padding:.5em .8em;font-weight:600;letter-spacing:.5px}.badge.bg-primary{background-color:var(--primary)!important;color:var(--primary-text)}.badge.bg-secondary{background-color:var(--secondary)!important}.form-control,.form-select{background-color:var(--bg-hover);border:1px solid var(--border-color);color:var(--text-main);border-radius:var(--radius-sm);padding:.7rem 1rem}.form-control:focus,.form-select:focus{background-color:var(--bg-hover);border-color:var(--primary);color:var(--text-main);box-shadow:0 0 0 2px #c5a47e33}.form-control::placeholder,.form-select::placeholder{color:var(--text-muted);opacity:.7}.form-label{color:var(--text-muted);font-weight:500;font-size:.9rem}.alert-success{background-color:#48bb7826;border:1px solid rgba(72,187,120,.3);color:#81e6d9}