:root {
  color-scheme: light dark;
  --canvas: #f1f3f1;
  --surface: #ffffff;
  --ink: #131713;
  --muted: #616963;
  --brand: #1e4a38;
  --border: #dfe5e0;
  --accent: #f4cb57;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0e100f;
    --surface: #252a26;
    --ink: #f0f3f1;
    --muted: #9ba49e;
    --brand: #8cc8a9;
    --border: #39413b;
    --accent: #d9b74f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  line-height: 1.72;
  letter-spacing: 0;
}

header, main, footer {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  border-bottom: 1px solid var(--border);
}

.brand {
  color: var(--ink);
  font-size: 20px;
  font-weight: 750;
  text-decoration: none;
}

nav { display: flex; gap: 18px; }

nav a, .text-link {
  color: var(--brand);
  font-weight: 650;
  text-decoration: none;
}

nav a[aria-current="page"] { color: var(--ink); }

main { padding: 64px 0 72px; }

h1, h2 { margin: 0; line-height: 1.24; }
h1 { max-width: 680px; font-size: clamp(36px, 8vw, 56px); }
h2 { margin-top: 42px; font-size: 22px; }
p, li { color: var(--muted); font-size: 17px; }

.lead {
  max-width: 650px;
  margin: 18px 0 40px;
  color: var(--ink);
  font-size: 20px;
}

.notice {
  margin: 26px 0;
  padding: 18px 20px;
  border-left: 5px solid var(--accent);
  background: var(--surface);
}

.notice p { margin: 0; }

.contact {
  margin-top: 34px;
  padding: 22px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
}

.contact p { margin: 5px 0; }

.contact-panel {
  margin-top: 36px;
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.contact-panel h2,
.email-contact h2 {
  margin-top: 6px;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  font-size: 14px;
  font-weight: 700;
}

.copy-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
  margin-top: 24px;
}

.copy-row code {
  display: flex;
  flex: 1;
  align-items: center;
  min-width: 0;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 17px;
  overflow-wrap: anywhere;
}

.copy-row button {
  min-height: 48px;
  padding: 0 18px;
  border: 0;
  border-radius: 6px;
  background: var(--brand);
  color: var(--surface);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.copy-row button:focus-visible,
.qr-figure a:focus-visible,
.text-link:focus-visible,
nav a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.copy-status {
  min-height: 25px;
  margin: 8px 0 0;
  color: var(--brand);
  font-size: 14px;
}

.qr-figure {
  width: min(100%, 300px);
  margin: 28px auto 0;
  text-align: center;
}

.qr-figure a { display: block; }

.qr-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  background: #ffffff;
}

.qr-figure figcaption {
  margin-top: 9px;
  color: var(--muted);
  font-size: 13px;
}

.email-contact {
  margin-top: 34px;
  padding-top: 6px;
}

.privacy-note {
  margin-top: 42px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}

footer {
  padding: 24px 0 36px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 620px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 18px 0;
  }

  nav { flex-wrap: wrap; gap: 10px 16px; }
  main { padding-top: 44px; }

  .contact-panel {
    padding: 22px;
  }

  .qr-figure {
    width: min(100%, 280px);
    margin-top: 24px;
  }

  .copy-row { flex-direction: column; }
  .copy-row button { width: 100%; }
}