:root {
  color-scheme: light;
  --border: #d8d3c9;
  --ink: #2a2620;
  --muted: #6b6558;
  --accent: #6b4f2a;
  --amber-bg: #fbead0;
  --amber-border: #e8c98a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: #fdfcfa;
  line-height: 1.5;
}

nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: #fff;
}

nav a { color: var(--ink); text-decoration: none; }
nav a:hover { text-decoration: underline; }

.nav-right { margin-left: auto; color: var(--muted); font-size: 0.9rem; }
.nav-right a { color: var(--muted); }

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1rem;
}

h1 { font-size: 1.5rem; margin: 0 0 1rem; }

.card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
  background: #fff;
}

.narrow { max-width: 22rem; }

label {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

label input, label select, label textarea {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--ink);
}

button, .btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button:hover, .btn:hover { opacity: 0.9; }

.btn-line {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--ink);
  text-decoration: none;
  background: #fff;
  font-size: 0.9rem;
}
.btn-line:hover { border-color: var(--accent); }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.5rem 0.6rem;
  text-align: left;
}

th {
  border-bottom: 2px solid var(--border);
  font-weight: 600;
}

td { border-bottom: 1px solid var(--border); }

.flash {
  background: var(--amber-bg);
  border: 1px solid var(--amber-border);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.muted { color: var(--muted); }

.overdue { color: #b00020; font-weight: 600; }

.num { text-align: right; }

@media print {
  nav, .no-print { display: none; }
}