:root {
  --bg: #f7f7f5; --fg: #1d1f21; --muted: #5f6368; --line: #dadce0;
  --card: #ffffff; --accent: #0b6e4f; --accent-fg: #ffffff; --error: #b3261e;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a; --fg: #e8eaed; --muted: #9aa0a6; --line: #34373b;
    --card: #1e2124; --accent: #3ddc97; --accent-fg: #0d1f17; --error: #f28b82;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, sans-serif; }
a { color: var(--accent); }
.top { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; padding: .75rem 1rem; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 700; text-decoration: none; color: var(--fg); }
.top nav { display: flex; flex-wrap: wrap; gap: .75rem; flex: 1; }
.top nav a { text-decoration: none; }
.who { display: flex; align-items: center; gap: .5rem; margin: 0; color: var(--muted); }
.who em { font-style: normal; font-size: .8rem; border: 1px solid var(--line); border-radius: 4px; padding: 0 .3rem; }
main { max-width: 52rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
form.card, .card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 1rem 1.25rem; margin: 0 0 1rem; }
label { display: block; margin: .75rem 0 .25rem; font-weight: 600; }
input[type=text], input[type=email], input[type=password], input[type=number], select {
  width: 100%; max-width: 26rem; padding: .5rem .6rem; border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg); color: var(--fg); font: inherit;
}
button, .button {
  display: inline-block; margin-top: 1rem; padding: .5rem 1rem; border: 0; border-radius: 6px;
  background: var(--accent); color: var(--accent-fg); font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.who button { margin: 0; padding: .25rem .6rem; background: transparent; color: var(--fg); border: 1px solid var(--line); }
.error { color: var(--error); font-weight: 600; }
.muted { color: var(--muted); }
code, .mono { font-family: ui-monospace, monospace; font-size: .95em; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--line); }