:root{--ah-blue: #00a1e6;--ah-blue-strong: #0078c8;--ah-blue-deep: #0057b8;--ink: #12314d;--ink-soft: #58708a;--bg: #f4f9fd;--surface: #ffffff;--surface-alt: #eef6fb;--line: #d9e7f2;--line-strong: #c6d9e8;--shadow-soft: 0 16px 38px rgba(0, 82, 145, .08);--shadow-float: 0 18px 34px rgba(0, 104, 180, .18)}*{box-sizing:border-box}html{background:linear-gradient(180deg,#d9f1ff,#f5fbff 32%,#eef6fb)}body{margin:0;color:var(--ink);font-family:SF Pro Display,Avenir Next,Segoe UI,sans-serif;background:radial-gradient(circle at top center,rgba(0,161,230,.22),transparent 28%),linear-gradient(180deg,#f7fcff,#eef6fb);padding-bottom:env(safe-area-inset-bottom)}button,input,textarea,select{font:inherit}button{-webkit-tap-highlight-color:transparent}.app-shell{min-height:100vh;padding:0}.app-surface{width:100%;max-width:460px;min-height:100vh;margin:0 auto;padding:calc(env(safe-area-inset-top) + 18px) 16px calc(env(safe-area-inset-bottom) + 30px);background:linear-gradient(180deg,#fffffffa,#f5fafffa);box-shadow:0 0 0 1px #fffc,var(--shadow-soft);position:relative;overflow:hidden}.app-surface:before{content:"";position:absolute;inset:0 0 auto;height:188px;background:radial-gradient(circle at 12% 20%,rgba(255,255,255,.45),transparent 34%),linear-gradient(135deg,var(--ah-blue-deep),var(--ah-blue));border-bottom-left-radius:32px;border-bottom-right-radius:32px;z-index:0}.topbar,.screen,.banner{position:relative;z-index:1}.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;color:#fff}.brand-lockup{display:grid;gap:3px}.brand-row{display:flex;align-items:center;gap:12px}.brand-logo{width:40px;height:40px;border-radius:14px;box-shadow:0 10px 24px #003c7e33;flex:0 0 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strong{color:#fff}@media(max-width:520px){.app-surface{max-width:none;box-shadow:none}.app-surface:before{border-bottom-left-radius:28px;border-bottom-right-radius:28px}.receipt-summary{grid-template-columns:1fr}.screen-panel-detail{align-items:flex-start}}@media(min-width:521px){.app-shell{padding:18px 0}.app-surface{min-height:calc(100vh - 36px);border-radius:34px}}.cart-section{display:grid;gap:12px;padding:18px;border-radius:28px;background:var(--surface);border:1px solid rgba(219,232,242,.9);box-shadow:var(--shadow-soft)}.cart-search{width:100%;min-height:48px;padding:0 16px;border-radius:999px;border:1px solid var(--line-strong);background:var(--surface-alt);color:var(--ink);font-size:.96rem}.cart-search:focus{outline:2px solid var(--ah-blue);outline-offset:1px}.cart-search-results{display:grid;gap:6px;padding:6px;border-radius:20px;background:var(--surface-alt);border:1px solid 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