:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #16181d;
  --muted: #5b6270;
  --accent: #3b5bdb;
  --border: #e3e6ec;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #171a21;
    --text: #e8eaef;
    --muted: #9aa3b2;
    --accent: #7c93ff;
    --border: #262b36;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font:
    15px/1.5 system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
}
.card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}
.brand {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
h1 {
  margin: 0 0 4px;
  font-size: 20px;
}
.muted {
  color: var(--muted);
  margin: 0 0 20px;
}
.who {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-bottom: 20px;
}
.who img {
  border-radius: 50%;
}
.who .muted {
  margin: 0;
}
.button,
button {
  display: inline-block;
  width: 100%;
  text-align: center;
  padding: 10px 14px;
  border: 0;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.button:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}