* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: #202020; background: #f5f5f2; }
button, input { font: inherit; }
button { cursor: pointer; border: 0; background: #1f5138; color: #fff; padding: 11px 16px; border-radius: 6px; }
button:disabled { opacity: .45; cursor: not-allowed; }
input { width: 100%; border: 1px solid #c9c9c3; border-radius: 5px; padding: 10px; background: #fff; }
label { display: grid; gap: 6px; font-size: 14px; color: #4a4a45; }
.shell { min-height: 100vh; padding: 28px; }
.workspace { max-width: 1180px; margin: 0 auto; }
.topbar { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
h1, h2, h3 { margin: 0; letter-spacing: 0; }
h1 { font-size: clamp(30px, 5vw, 58px); line-height: 1; }
h2 { font-size: 22px; }
h3 { font-size: 17px; }
.eyebrow { color: #996b28; font-size: 12px; text-transform: uppercase; font-weight: 700; letter-spacing: .08em; }
.status { background: #fff; border: 1px solid #ddd; border-radius: 999px; padding: 9px 14px; white-space: nowrap; }
.steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.panel { background: #fff; border: 1px solid #ddd; border-radius: 8px; padding: 18px; display: grid; gap: 14px; }
.panel.muted { opacity: .62; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 12px; align-items: end; }
.product { display: grid; grid-template-columns: minmax(280px, 52%) 1fr; gap: 22px; margin-top: 20px; background: #fff; border: 1px solid #ddd; border-radius: 8px; overflow: hidden; }
.product-media { min-height: 360px; background: #ddd; display: grid; place-items: center; }
.product-media img { width: 100%; height: 100%; object-fit: cover; }
.product-info { padding: 24px; display: grid; align-content: center; gap: 16px; }
dl { display: grid; gap: 10px; margin: 0; }
dl div { display: grid; grid-template-columns: 100px 1fr; gap: 12px; }
dt { color: #777; } dd { margin: 0; }
.customizer { position: fixed; inset: 0; background: #fff; z-index: 20; display: grid; grid-template-columns: minmax(0, 1fr) 390px; }
.canvasPane { background: #d9d7d0; min-width: 0; }
#muralCanvas { width: 100%; height: 100%; display: block; touch-action: none; }
.toolPane { border-left: 1px solid #ddd; padding: 18px; overflow: auto; display: grid; gap: 16px; align-content: start; }
.close { background: #57534b; justify-self: end; }
.dimensions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tools { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.tools button { background: #3e4640; }
.readout { background: #f3f1eb; border: 1px solid #ded9cd; border-radius: 6px; padding: 12px; font-size: 14px; line-height: 1.55; }
.orderForm { display: grid; gap: 10px; border-top: 1px solid #ddd; padding-top: 14px; }
.hidden { display: none !important; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.toast { position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); background: #222; color: #fff; padding: 10px 14px; border-radius: 6px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 50; }
.toast.show { opacity: 1; }
@media (max-width: 820px) {
  .shell { padding: 16px; }
  .topbar, .steps, .form-grid, .product, .customizer { grid-template-columns: 1fr; display: grid; }
  .topbar { align-items: start; }
  .status { white-space: normal; }
  .customizer { grid-template-rows: 48vh 52vh; }
  .toolPane { border-left: 0; border-top: 1px solid #ddd; }
}