:root {
  color-scheme: light dark;
  --bg: #f5f6fa;
  --surface: #fff;
  --ink: #101827;
  --text: #474f60;
  --muted: #5b657b;
  --line: #d9deea;
  --navy: #2c397c;
  --accent-text: #fff;
  --notice: #fef3c7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1422;
    --surface: #171d2c;
    --ink: #eef1f8;
    --text: #c9cfdb;
    --muted: #a1a9ba;
    --line: #414c64;
    --navy: #bcc6ff;
    --accent-text: #10152a;
    --notice: #33280f;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 48px 20px;
  background: var(--bg);
  color: var(--text);
  font:
    16px/1.6 -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}
main {
  max-width: 740px;
  margin: auto;
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
}
h1 {
  margin: 8px 0 20px;
  color: var(--ink);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}
.logo {
  max-width: 230px;
  height: 48px;
  object-fit: contain;
  object-position: left;
}
.eyebrow {
  margin-top: 38px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.lead {
  font-size: 19px;
}
a {
  color: var(--navy);
}
.invite-row {
  display: flex;
  gap: 10px;
  margin-top: 30px;
}
input {
  min-width: 0;
  flex: 1;
  padding: 12px;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}
button {
  padding: 12px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--navy);
  color: var(--accent-text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
:focus-visible {
  outline: 3px solid var(--navy);
  outline-offset: 4px;
}
.notice {
  padding: 18px;
  border-radius: 10px;
  background: var(--notice);
  color: var(--ink);
}
#copy-result {
  min-height: 24px;
  color: var(--muted);
  font-size: 14px;
}
.agent-note {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  margin-top: 28px;
  color: var(--muted);
  font-size: 14px;
}
footer {
  margin-top: 36px;
  font-size: 13px;
  color: var(--muted);
}
@media (max-width: 500px) {
  body {
    padding: 14px;
  }
  main {
    padding: 24px;
  }
  .invite-row {
    flex-direction: column;
  }
}