:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1d2330;
  --muted: #5b6475;
  --accent: #1f5fbf;
  --accent-text: #ffffff;
  --border: #d5dae3;
  --error-bg: #fde8e8;
  --error-text: #8a1c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151c;
    --card: #1b202b;
    --text: #e8ebf2;
    --muted: #9aa3b5;
    --accent: #6ea2f0;
    --accent-text: #0d1117;
    --border: #2d3445;
    --error-bg: #3a1c1c;
    --error-text: #f5b5b5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; margin-right: auto; }
.who { color: var(--muted); }
main {
  max-width: 28rem;
  margin: 2rem auto;
  padding: 1.5rem 1rem;
}
h1 { font-size: 1.4rem; margin: 0 0 1rem; }
label { display: block; margin: 0 0 1rem; font-weight: 500; }
input[type="email"], input[type="password"] {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.6rem 0.7rem;
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
}
button {
  padding: 0.6rem 1.1rem;
  font: inherit;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}
button.link {
  padding: 0;
  color: var(--accent);
  background: none;
  font-weight: 500;
  text-decoration: underline;
}
form.inline { display: inline; margin: 0; }
a { color: var(--accent); }
.error {
  padding: 0.6rem 0.8rem;
  color: var(--error-text);
  background: var(--error-bg);
  border-radius: 6px;
}
main.wide { max-width: 64rem; }
.muted { color: var(--muted); }
table { width: 100%; border-collapse: collapse; background: var(--card); }
th, td { padding: 0.5rem 0.6rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
th { font-weight: 600; }