:root { font-family: system-ui, sans-serif; color: #153c49; background: #eef4f7; font-size: 16px; line-height: 1.7; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 1000px; margin: auto; padding: 32px 28px; }
header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 28px; }
.brand { font-size: 26px; font-weight: 800; color: #104c62; }
.tag { background: white; border: 1px solid #d5e3e9; border-radius: 24px; padding: 6px 14px; }
h1 { font-size: clamp(28px, 4vw, 42px); line-height: 1.45; margin: 12px 0 18px; }
h2 { font-size: 20px; margin: 0; }
p { margin: 12px 0; }
.panel { background: white; padding: 26px 30px; border: 1px solid #d9e5ea; border-radius: 18px; margin-bottom: 20px; }
.recommend { background: #0b5770; color: white; padding: 34px 38px; border-radius: 22px; margin-bottom: 22px; }
.recommend-grid { display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 36px; align-items: center; }
.stock { display: flex; flex-direction: column; text-align: center; border-left: 1px solid #6595a4; padding-left: 12px; }
.stock strong { font-size: 86px; line-height: 1.2; font-weight: 500; }
.stock span { font-size: 14px; }
.counts { display: flex; flex-wrap: wrap; gap: 24px; margin: 20px 0; }
label { display: block; margin: 16px 0; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-block: 16px; }
.controls > * { min-width: 0; max-width: 100%; }
select, button { font: inherit; min-height: 46px; }
select { padding: 8px; color: #153c49; background: white; }
button { font-weight: 700; background: #0b5770; color: white; border: 0; border-radius: 10px; padding: 12px 22px; cursor: pointer; white-space: normal; overflow-wrap: anywhere; }
button:disabled { opacity: .45; cursor: default; }
:focus-visible { outline: 3px solid #d49a28; outline-offset: 4px; }
footer { border-top: 1px solid #d2e0e5; margin-top: 32px; padding-top: 20px; font-size: 12px; }
@media (max-width: 650px) {
  main { padding: 22px 16px; }
  .panel { padding: 22px 18px; }
  .recommend { padding: 26px 22px; }
  .recommend-grid { grid-template-columns: minmax(0, 1fr) 92px; gap: 14px; }
  .stock strong { font-size: 60px; }
  .stock span { font-size: 12px; }
  .controls { flex-direction: column; align-items: stretch; }
  .controls > select, .controls > button { width: 100%; }
}
@media (max-width: 380px) {
  .recommend-grid { grid-template-columns: minmax(0, 1fr); }
  .stock { border-left: 0; border-top: 1px solid #6595a4; padding: 12px 0 0; }
}