:root { --ink: #1f2328; --muted: #59636e; --line: #d1d9e0; --accent: #b26a00; --bad: #b3261e; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, sans-serif; color: var(--ink); background: #fff; }
header { display: flex; justify-content: space-between; align-items: center; gap: 1rem;
         padding: .75rem 1rem; border-bottom: 1px solid var(--line); }
header nav { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
header nav form { margin: 0; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
main { max-width: 46rem; margin: 0 auto; padding: 1rem; }
a { color: var(--accent); }
label { display: block; margin: .75rem 0; }
input[type=text], input[type=email], input[type=password] {
    display: block; width: 100%; padding: .5rem; font: inherit; border: 1px solid var(--line); border-radius: 6px; }
button { padding: .5rem 1rem; font: inherit; color: #fff; background: var(--accent); border: 0;
         border-radius: 6px; cursor: pointer; }
button.link { padding: 0; color: var(--accent); background: none; text-decoration: underline; }
button.danger { background: var(--bad); }
.notice, .error { padding: .5rem .75rem; border-radius: 6px; background: #f6f8fa; }
.error { color: var(--bad); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .5rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
td form { display: inline; }
.muted { color: var(--muted); }
.code { font: 700 1.75rem/1 ui-monospace, monospace; letter-spacing: .15em; }
.qr { width: 14rem; height: 14rem; }
dt { color: var(--muted); }
dd { margin: 0 0 .75rem; }