:root {
  --navy: #061728;
  --deep: #0b2d46;
  --water: #1389a6;
  --aqua: #87d7e8;
  --gray: #66717c;
  --line: #dfe9ee;
  --light: #f3f7f9;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(6, 23, 40, .18);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--navy);
  background: radial-gradient(circle at top left, rgba(135, 215, 232, .5), transparent 30%), linear-gradient(135deg, #eef6f8 0%, #ffffff 48%, #dcecf2 100%);
}
.page { min-height: 100vh; display: grid; place-items: center; padding: 26px; }
.card { width: min(1040px, 100%); background: rgba(255, 255, 255, .94); border: 1px solid rgba(223, 233, 238, .9); border-radius: 28px; box-shadow: var(--shadow); overflow: hidden; }
.brand { display: flex; align-items: center; justify-content: center; padding: 28px 32px; background: linear-gradient(135deg, var(--navy), var(--deep)); color: var(--white); text-align: center; }
.brand-center { display: flex; align-items: center; justify-content: center; gap: 14px; }
.mark { width: 58px; height: 58px; border-radius: 18px; display: grid; place-items: center; font-weight: 900; letter-spacing: -3px; background: linear-gradient(135deg, var(--water), var(--aqua)); }
.brand h1 { margin: 0; font-size: 34px; letter-spacing: -1.5px; }
.steps { display: grid; grid-template-columns: repeat(5, 1fr); border-bottom: 1px solid var(--line); background: var(--light); }
.step { border: 0; border-right: 1px solid var(--line); background: transparent; padding: 18px 10px; font-weight: 800; color: var(--gray); cursor: pointer; }
.step:last-child { border-right: 0; }
.step.active { color: var(--white); background: var(--water); }
.panel { display: none; padding: 32px; }
.panel.active { display: block; }
.section-head { margin-bottom: 22px; }
.section-head h2 { margin: 0 0 5px; font-size: 32px; letter-spacing: -1px; }
.section-head p { margin: 0; color: var(--gray); }
.product-list { display: grid; gap: 10px; }
.product { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); transition: transform .18s ease, box-shadow .18s ease; }
.product:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(6, 23, 40, .08); }
.product h3 { margin: 0; font-size: 18px; }
.product-meta { display: flex; flex-direction: column; gap: 6px; }
.product-sub { margin: 0; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; color: var(--gray); font-size: 14px; }
.code-pill { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; font-weight: 700; color: var(--water); background: var(--light); border: 1px solid var(--line); border-radius: 999px; padding: 2px 9px; }
.product-sub .price { font-weight: 800; color: var(--navy); }
select, input { width: 100%; border: 1px solid var(--line); border-radius: 14px; padding: 14px 13px; margin-top: 8px; font-size: 15px; background: var(--white); }
.product select { width: 125px; margin-top: 0; font-weight: 700; }
label { display: block; font-weight: 800; margin-bottom: 17px; }
.primary, .secondary { border: 0; border-radius: 999px; padding: 14px 22px; font-weight: 900; cursor: pointer; }
.primary { background: var(--water); color: var(--white); margin-top: 24px; }
.secondary { background: var(--light); color: var(--navy); border: 1px solid var(--line); margin-top: 24px; }
.actions { display: flex; justify-content: space-between; gap: 12px; }
.review-box { border: 1px solid var(--line); border-radius: 18px; background: var(--light); padding: 18px; min-height: 110px; }
.review-item { display: flex; justify-content: space-between; padding: 13px 0; border-bottom: 1px solid var(--line); }
.review-item:last-child { border-bottom: 0; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.grid.three { grid-template-columns: 1fr 1fr 1fr; }
.center { text-align: center; padding: 70px 32px; }
.done-icon { width: 74px; height: 74px; border-radius: 50%; margin: 0 auto 18px; display: grid; place-items: center; background: var(--water); color: white; font-size: 38px; font-weight: 900; }
@media (max-width: 760px) {
  .page { padding: 12px; }
  .card { border-radius: 20px; }
  .brand { padding: 22px; }
  .brand-center { flex-direction: column; gap: 10px; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--line); }
  .panel { padding: 22px; }
  .product { align-items: flex-start; flex-direction: column; }
  .product select { width: 100%; }
  .grid, .grid.three { grid-template-columns: 1fr; }
  .actions { flex-direction: column; }
}