:root{--red:#e10600;--red-600:#b50a05;--red-700:#8b0000;--black:#0c0c0c;--black-soft:#1a1a1a;--gray-100:#f8f9fa;--gray-200:#e9ecef;--gray-300:#dee2e6;--gray-400:#ced4da;--gray-500:#6c757d;--gray-600:#495057;--gray-700:#343a40;--gray-800:#212529;--muted:#6c757d;--white:#ffffff;--bg:#ffffff;--card:#ffffff;--radius:12px;--radius-lg:16px;--pad:16px;--shadow:0 2px 8px rgba(0,0,0,0.08);--shadow-lg:0 4px 16px rgba(0,0,0,0.12)}*{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--black);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--white);border-bottom:1px solid 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10px;border-radius:20px;font-weight:600}.product-img{width:100%;aspect-ratio:1/1;object-fit:cover;background:var(--gray-100)}.product-body{padding:20px;display:flex;flex-direction:column;gap:12px}.product-name{font-weight:700;color:var(--black);font-size:16px;line-height:1.3}.product-price{color:var(--red);font-weight:700;font-size:18px}.stock.in{color:var(--red);font-size:13px;font-weight:600}.stock.out{color:var(--gray-500);font-size:13px;font-weight:600}.searchbar{display:flex;gap:12px;margin-bottom:24px}.searchbar .input{flex:1}.announcements li{padding:16px 0;border-bottom:1px dashed var(--gray-300)}.tabbar{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--gray-200);background:var(--white);padding:12px 8px calc(env(safe-area-inset-bottom) + 12px);box-shadow:0 -2px 8px 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p{color:var(--gray-600);line-height:1.6;margin:0}.specs-grid{display:grid;gap:16px}.spec-item{display:flex;justify-content:space-between;align-items:center;padding:16px;background:var(--gray-100);border-radius:var(--radius)}.spec-label{font-weight:600;color:var(--gray-600)}.spec-value{font-weight:700;color:var(--black)}.spec-value.in-stock{color:var(--red)}.spec-value.out-of-stock{color:var(--gray-500)}.spec-value.price{color:var(--red)}.product-actions{display:grid;gap:20px;padding:24px;background:var(--gray-100);border-radius:var(--radius-lg);text-align:center}.price-section{display:flex;flex-direction:column;align-items:center;gap:8px}.main-price{font-size:32px;font-weight:700;color:var(--red)}.price-unit{font-size:16px;color:var(--gray-600)}.btn-large{padding:20px 32px;font-size:18px;font-weight:700}.product-link{text-decoration:none;color:inherit}.product-link:hover .product-name{color:var(--red)}.guest-mode .product-price,.guest-mode .main-price,.guest-mode .spec-value.price{display:none}.guest-mode .product-description,.guest-mode .product-specs{display:none}.guest-mode .btn:not(.btn-login){display:none}.guest-mode .guest-notice{display:block;background:rgba(245,158,11,0.1);color:#92400e;padding:12px 16px;border-radius:var(--radius);font-size:14px;text-align:center;margin-top:12px;font-weight:600}.guest-notice{display:none}.login-container{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px;background:linear-gradient(135deg,var(--gray-100) 0%,var(--white) 100%)}.login-card{width:100%;max-width:420px;background:var(--white);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow-lg);border:1px solid var(--gray-200)}.login-header{text-align:center;margin-bottom:32px}.login-title{font-size:32px;font-weight:700;color:var(--black);margin-bottom:8px}.login-subtitle{color:var(--muted);font-size:16px}.guest-mode-banner{background:linear-gradient(135deg,rgba(37,99,235,0.1) 0%,rgba(37,99,235,0.05) 100%);border:1px solid rgba(37,99,235,0.2);border-radius:var(--radius-lg);padding:20px;margin-bottom:24px;text-align:center}.guest-mode-banner h3{color:#1e40af;font-size:18px;font-weight:700;margin-bottom:8px}.guest-mode-banner p{color:#1e40af;font-size:14px;margin:0}@media (min-width:768px){.product-details{grid-template-columns:1fr 1fr;align-items:start}.product-image-section{position:sticky;top:100px}.view{padding:32px 24px}.app-header{padding:20px 32px}}@media (min-width:1024px){.grid.products{grid-template-columns:repeat(4,1fr)}.view{max-width:1400px;margin:0 auto;padding:40px 32px}.app-header{padding:24px 40px}}.loading{opacity:0.6;pointer-events:none}.spinner{display:inline-block;width:16px;height:16px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}#toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:12px}#confirm-bar{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:10000;background:var(--black);color:var(--white);padding:16px 20px;border-radius:var(--radius-lg);display:flex;align-items:center;gap:16px;box-shadow:var(--shadow-lg)}#confirm-bar button{padding:10px 16px;border-radius:var(--radius);font-weight:600;cursor:pointer;transition:all 0.2s ease}#confirm-bar button:first-of-type{background:var(--red);color:var(--white);border:none}#confirm-bar button:last-of-type{background:transparent;color:var(--white);border:1px solid var(--gray-600)}#confirm-bar button:hover{transform:translateY(-1px)}