body { font-family: system-ui, sans-serif; margin: 0; color: #222; }
header { display: flex; justify-content: space-between; align-items: center;
  padding: .5rem 1rem; background: #1d3b53; }
header nav a { color: #fff; margin-right: 1rem; text-decoration: none; }
header .logout button { background: transparent; color: #cfe; border: 1px solid #cfe;
  border-radius: 4px; cursor: pointer; }
main { padding: 1rem; max-width: 1000px; margin: 0 auto; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid #ddd; padding: .4rem .6rem; text-align: left; }
.flash { background: #eef; border: 1px solid #99c; padding: .5rem; list-style: none; }
.error { color: #b00; }
.locked { color: #b06000; font-weight: bold; }
form.inline { display: inline; }