body { margin: 0; background: #f1f3f5; color: #000; font-family: -apple-system, sans-serif; font-size: 13px; line-height: 1.6; }
.syn-layout { max-width: 1080px; margin: 40px auto; padding: 0 15px; box-sizing: border-box; }
.syn-header { display: flex; justify-content: space-between; align-items: center; background: #fff; border: 2.5px solid #000; box-shadow: 5px 5px 0px #000; padding: 20px 30px; margin-bottom: 30px; }
.syn-logo img { height: 22px; filter: grayscale(1) contrast(2); }
.syn-nav { display: flex; gap: 12px; }
.syn-nav a { color: #000; text-decoration: none; padding: 8px 18px; border: 2px solid #000; font-size: 12px; font-weight: bold; background: #fff; transition: 0.15s; }
.syn-nav a:hover, .syn-nav .active { background: #ffea00; box-shadow: 2px 2px 0px #000; transform: translate(-1px, -1px); }
.syn-notice-bar { background: #fff; border: 2.5px solid #000; box-shadow: 5px 5px 0px #000; padding: 20px; margin-bottom: 30px; position: relative; }
.syn-notice-title { font-weight: bold; color: #ff007f; margin-bottom: 5px; }
.syn-cat-hd { font-size: 14px; font-weight: bold; margin: 35px 0 15px; border-left: 4px solid #000; padding-left: 10px; text-transform: uppercase; }
.syn-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.syn-card { background: #fff; border: 2.5px solid #000; box-shadow: 5px 5px 0px #000; padding: 25px; text-decoration: none; color: #000; transition: 0.15s; position: relative; display: block; }
.syn-card:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0px #000; }
.syn-img-box { width: 100%; aspect-ratio: 1.5; background: #f8f9fa; border: 2px solid #000; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.syn-img-box img { width: 45%; height: 45%; object-fit: contain; }
.syn-name { height: 38px; line-height: 1.5; overflow: hidden; margin-bottom: 15px; font-weight: bold; }
.syn-footer-meta { display: flex; justify-content: space-between; align-items: center; border-top: 2px solid #000; padding-top: 15px; }
.syn-price { font-size: 16px; font-weight: bold; }
.syn-tag-auto { position: absolute; top: 12px; right: 12px; font-size: 9px; border: 2px solid #000; padding: 1px 6px; color: #000; background: #00e5ff; font-weight: bold; }
.syn-trade-node { border: 2.5px solid #000; box-shadow: 6px 6px 0px #000; display: flex; flex-wrap: wrap; background: #fff; }
.syn-media-side { flex: 0 0 35%; padding: 40px; display: flex; align-items: center; border-right: 2.5px solid #000; box-sizing: border-box; background: #f8f9fa; }
.syn-media-side img { width: 100%; border: 2px solid #000; box-shadow: 4px 4px 0px #000; }
.syn-form-side { flex: 1; padding: 40px; min-width: 320px; box-sizing: border-box; }
.syn-tag-status { display: inline-block; padding: 3px 8px; border: 2px solid #000; font-size: 11px; margin-bottom: 20px; color: #000; background: #00e5ff; font-weight: bold; }
.syn-price-node { margin-bottom: 25px; padding: 20px; background: #f8f9fa; border: 2px solid #000; display: flex; justify-content: space-between; align-items: center; }
.syn-price-val { font-size: 24px; font-weight: bold; }
.syn-input { width: 100%; height: 42px; background: #fff; border: 2px solid #000; color: #000; padding: 0 15px; box-sizing: border-box; outline: none; margin-bottom: 15px; font-weight: bold; }
.syn-input:focus { background: #f8f9fa; }
.syn-btn-submit { width: 100%; height: 46px; background: #ffea00; color: #000; border: 2.5px solid #000; box-shadow: 4px 4px 0px #000; cursor: pointer; font-size: 13px; font-weight: bold; transition: 0.15s; }
.syn-btn-submit:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0px #000; }
.syn-btn-submit:disabled { background: #eee; color: #aaa; box-shadow: none; border-color: #aaa; cursor: not-allowed; }
.syn-desc-box { margin-top: 30px; border: 2.5px solid #000; box-shadow: 5px 5px 0px #000; padding: 30px; background: #fff; }
.syn-desc-title { font-size: 12px; font-weight: bold; margin-bottom: 15px; border-left: 3px solid #000; padding-left: 10px; }
.syn-ls-container { border: 2px solid #000; background: #fff; }
.syn-ls-th { display: flex; padding: 12px 20px; background: #f8f9fa; border-bottom: 2px solid #000; font-weight: bold; }
.syn-ls-tr { display: flex; padding: 16px 20px; border-bottom: 1px solid #eee; align-items: center; }
.syn-ls-tr:last-child { border-bottom: none; }
.syn-cl-name { flex: 2; } .syn-cl-name a { color: #000; text-decoration: none; font-weight: bold; }
.syn-cl-mode, .syn-cl-price, .syn-cl-stock { flex: 0.8; text-align: center; }
.syn-cl-opt { flex: 0.6; text-align: right; }
.syn-btn-go { display: inline-block; background: #fff; color: #000; border: 2px solid #000; padding: 4px 15px; text-decoration: none; font-size: 11px; font-weight: bold; }
.syn-checkout-node { background: #fff; border: 2.5px solid #000; box-shadow: 5px 5px 0px #000; padding: 30px; max-width: 520px; margin: 40px auto; }
.syn-data-row { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px dashed #ccc; }
.syn-gateway-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 15px; }
.syn-gateway-btn { background: #fff; border: 2px solid #000; padding: 15px; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.syn-gateway-btn:hover { background: #f8f9fa; }
.syn-gateway-btn img { height: 24px; }
.syn-auth-node { background: #fff; border: 2.5px solid #000; box-shadow: 5px 5px 0px #000; overflow: hidden; max-width: 440px; margin: 40px auto; }
.syn-auth-tab { display: flex; background: #f8f9fa; border-bottom: 2.5px solid #000; }
.syn-auth-link { flex: 1; text-align: center; line-height: 48px; color: #555; text-decoration: none; border-right: 2px solid #000; font-weight: bold; }
.syn-auth-link:last-child { border-right: none; }
.syn-auth-link.is-active { background: #fff; color: #000; font-weight: bold; position: relative; }
.syn-auth-link.is-active::after { content: ""; position: absolute; bottom: 0; left: 0; width: 100%; height: 3px; background: #000; }
.syn-mini-table { margin-top: 20px; border: 2px solid #000; overflow: hidden; }
.syn-mini-row { display: flex; padding: 10px; border-bottom: 2px solid #000; align-items: center; color: #555; }
.syn-mini-h { background: #f8f9fa; }
.syn-m-node { border: 2px solid #000; margin-bottom: 10px; background: #fff; overflow: hidden; }
.syn-m-trigger { padding: 12px; display: flex; justify-content: space-between; cursor: pointer; font-weight: bold; }
.syn-footer { display: flex; justify-content: space-between; border-top: 2.5px solid #000; padding-top: 25px; margin-top: 40px; font-size: 11px; font-weight: bold; }
.syn-footer a { color: #000; text-decoration: none; margin-left: 15px; }
@media (max-width: 768px) {
    .syn-header { flex-direction: column; gap: 15px; }
    .syn-grid { grid-template-columns: 1fr; }
    .syn-media-side { border-right: none; }
}