:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: #071018;
  color: #e7eef4;
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: #3ddc97; }
header, main { width: min(760px, calc(100% - 32px)); margin: 0 auto; }
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0 8px;
}
.brand { color: inherit; font-weight: 700; letter-spacing: 0.08em; text-decoration: none; }
nav a { margin-left: 16px; text-decoration: none; }
h1 { font-size: 32px; line-height: 1.15; margin: 18px 0 8px; }
h2 { font-size: 20px; margin: 28px 0 10px; }
.lead { color: #b7c4ce; margin-top: 0; }
.cards { display: grid; gap: 12px; }
.card, form.panel, .note {
  background: #10202b;
  border: 1px solid #1d3442;
  border-radius: 16px;
  padding: 16px;
}
.card h3 { margin: 0 0 6px; }
.price { color: #3ddc97; font-size: 20px; margin: 8px 0; }
.muted { color: #9aafbc; }
label { display: block; margin: 10px 0 6px; }
input, textarea {
  width: 100%;
  border: 1px solid #2a4658;
  background: #071018;
  color: inherit;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}
textarea { min-height: 110px; resize: vertical; }
button, .button {
  display: inline-block;
  margin-top: 12px;
  background: #3ddc97;
  color: #071018;
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
code {
  display: block;
  margin-top: 8px;
  padding: 12px;
  border-radius: 12px;
  background: #071018;
  word-break: break-all;
}
.warn { color: #ffd38a; }