:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  background: #f6f5f1;
  color: #193d35;
  --muted: #596761;
  --line: #dfe3da;
  --accent: #e4edcf;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 280px; }
.shell { width: min(100%, 1080px); min-height: 100svh; margin: auto; padding: 36px 48px 28px; display: flex; flex-direction: column; }
.page-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; font-size: 15px; font-weight: 650; letter-spacing: -.02em; }
.brand-icon { display: block; flex-shrink: 0; width: 36px; height: 36px; object-fit: contain; border-radius: 10px; }
select { min-height: 44px; max-width: 125px; padding: 8px 26px 8px 12px; border: 1px solid var(--line); border-radius: 10px; background: transparent; color: inherit; font: inherit; font-size: 14px; cursor: pointer; }
main { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 72px; flex: 1; padding: 64px 0; }
.eyebrow { margin: 0 0 20px; font-size: 11px; font-weight: 700; line-height: 1.5; text-transform: uppercase; letter-spacing: .16em; }
h1 { margin: 0; max-width: 10ch; font-size: clamp(2.8rem, 5.5vw, 3.75rem); font-weight: 600; letter-spacing: -.055em; line-height: 1.05; text-wrap: balance; }
.message { margin: 24px 0 0; max-width: 38ch; color: var(--muted); font-size: 17px; line-height: 1.7; }
.hint { margin: 28px 0 0; padding-left: 16px; max-width: 40ch; border-left: 2px solid #adbca0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.help { margin-top: 28px; max-width: 40ch; font-size: 13px; line-height: 1.7; }
.help summary { width: fit-content; padding: 10px 0; font-weight: 600; cursor: pointer; }
.help p { margin: 8px 0 0; color: var(--muted); }
.action-card { padding: 32px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 14px 42px #23352a06; }
.card-heading { display: flex; align-items: center; gap: 16px; }
.phone-icon { position: relative; flex-shrink: 0; display: block; width: 50px; height: 50px; border-radius: 16px; background: var(--accent); }
.phone-icon::before { content: ""; position: absolute; inset: 12px 17px; border: 1.8px solid #193d35; border-radius: 4px; }
.phone-icon::after { content: ""; position: absolute; width: 4px; height: 2px; left: 23px; bottom: 16px; border-radius: 2px; background: #193d35; }
.card-eyebrow { margin: 0 0 4px; font-size: 11px; font-weight: 600; color: var(--muted); }
h2 { margin: 0; font-size: 20px; font-weight: 650; letter-spacing: -.03em; line-height: 1.3; }
.steps { list-style: none; counter-reset: step; display: grid; gap: 22px; margin: 30px 0 0; padding: 0; }
.steps li { counter-increment: step; display: flex; align-items: flex-start; gap: 14px; }
.steps li::before { content: counter(step, decimal-leading-zero); display: grid; place-items: center; flex: 0 0 29px; height: 29px; border: 1px solid var(--line); border-radius: 50%; font-size: 10px; font-weight: 650; color: var(--muted); font-variant-numeric: tabular-nums; }
h3 { margin: 3px 0 5px; font-size: 14px; font-weight: 650; line-height: 1.4; }
.steps p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.card-note { margin: 28px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.6; }
.invitation { margin-top: 28px; }
.invitation label { display: block; margin-bottom: 10px; color: var(--muted); font-size: 12px; font-weight: 600; }
.invitation input { width: 100%; min-height: 62px; padding: 18px 10px; border: 1px solid #d4ddc8; border-radius: 12px; background: #f5f8ef; color: #193d35; font: 600 clamp(.85rem, 3.5vw, 1.2rem) ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .10em; text-align: center; }
.invitation button { display: flex; align-items: center; justify-content: center; gap: 12px; width: 100%; min-height: 50px; margin-top: 12px; padding: 12px 20px; border: 1px solid transparent; border-radius: 12px; background: #193d35; color: #fff; font: 600 14px -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; cursor: pointer; }
.invitation button:hover { background: #285347; }
.copy-icon { position: relative; width: 12px; height: 14px; border: 1px solid currentColor; border-radius: 2px; }
.copy-icon::after { content: ""; position: absolute; left: 3px; top: 3px; width: 10px; height: 12px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; border-radius: 0 0 2px 0; }
.status { margin: 10px 0 0; font-size: 12px; line-height: 1.6; }
.status:empty { display: none; }
:focus-visible { outline: 3px solid #67874d; outline-offset: 4px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
[hidden] { display: none !important; }
noscript { grid-column: 1 / -1; color: var(--muted); font-size: 14px; line-height: 1.6; }
@media (max-width: 800px) {
  .shell { max-width: 560px; padding: 24px; }
  .page-header { padding-bottom: 20px; }
  main { grid-template-columns: 1fr; align-items: start; gap: 32px; padding: 44px 0; }
  h1 { max-width: 13ch; font-size: clamp(2.6rem, 8vw, 3.25rem); }
  .message { font-size: 16px; margin-top: 20px; }
  .hint { margin-top: 20px; }
  .help { margin-top: 16px; }
  .action-card { padding: 26px; }
}
@media (max-width: 360px) {
  .shell { padding: 20px 16px; }
  .brand { gap: 8px; font-size: 13px; }
  select { max-width: 105px; }
  .action-card { padding: 22px; }
}