:root { font: 14px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #1f2937; background: #f5f7fa; color-scheme: light; }
* { box-sizing: border-box; font-size: 14px; }
body { margin: 0; }
[hidden] { display: none !important; }
header { background: #fff; border-bottom: 1px solid #e5e7eb; padding: 18px max(20px, calc((100% - 1000px) / 2)); display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.brand { text-decoration: none; color: #1677ff; font-weight: 700; }
header span, .muted, footer { color: #64748b; }
main { max-width: 1040px; margin: auto; padding: 28px 20px; }
.intro { padding: 16px 0 24px; max-width: 760px; }
h1, h2, h3 { margin: 0 0 12px; font-weight: 700; }
p { margin: 10px 0; overflow-wrap: anywhere; }
.eyebrow { display: block; letter-spacing: 2px; color: #1677ff; margin-bottom: 14px; }
#catalog { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 16px; }
.panel, .product { border: 1px solid #e5e7eb; background: #fff; border-radius: 6px; padding: 22px; margin-bottom: 18px; min-width: 0; }
.product { display: flex; flex-direction: column; gap: 10px; }
.product p { white-space: pre-wrap; flex: 1; }
.price { font-weight: 700; color: #1677ff; }
.panel { margin-top: 18px; }
.section-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.section-title h2 { margin: 0; }
button, input { font: inherit; border-radius: 6px; border: 1px solid #d1d5db; padding: 9px 12px; min-height: 40px; }
button { cursor: pointer; background: #fff; color: #334155; }
button:hover { border-color: #1677ff; color: #1677ff; }
button:disabled { cursor: not-allowed; opacity: .5; }
button.primary { background: #1677ff; border-color: #1677ff; color: #fff; }
input { width: 100%; min-width: 0; background: #fff; color: #1f2937; }
input:focus, button:focus-visible { outline: 2px solid #91caff; outline-offset: 2px; }
label { display: block; margin: 16px 0 6px; }
.check { display: flex; align-items: flex-start; gap: 10px; }
.check input { width: 16px; min-height: 16px; margin: 4px 0 0; flex-shrink: 0; }
#checkoutForm { max-width: 650px; }
.copy-row { display: flex; gap: 8px; }
.copy-row button { flex-shrink: 0; }
.warning, #notice { background: #fff7e6; border: 1px solid #ffe7ba; color: #874d00; border-radius: 6px; padding: 12px; }
.payment-amount { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; background: #e6f4ff; padding: 16px; border-radius: 6px; color: #0958d9; }
.payment-amount strong { font-variant-numeric: tabular-nums; }
.badge { background: #e6f4ff; color: #0958d9; padding: 4px 10px; border-radius: 6px; }
dl { display: grid; grid-template-columns: 150px 1fr; margin: 0 0 20px; gap: 8px; }
dt { color: #64748b; } dd { margin: 0; overflow-wrap: anywhere; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
ol { padding-left: 22px; }
footer { padding: 16px 20px 30px; text-align: center; }
@media (max-width: 600px) { main { padding: 16px 12px; } header { padding: 14px 12px; } .panel, .product { padding: 16px; } dl { grid-template-columns: 1fr; gap: 3px; } dd { margin-bottom: 8px; } .copy-row { flex-wrap: wrap; } .copy-row input { flex-basis: 100%; } .copy-row button { width: 100%; } }