:root {
  --teal: #0D9488;
  --teal-dark: #0b7d73;
  --amber: #F59E0B;
  --ink: #1a1a2e;
  --bg: #f6f8f8;
  --panel: #ffffff;
  --border: #dde3e3;
  --muted: #6b7a7a;
  --danger: #c0392b;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
}

#app { display: flex; min-height: 100vh; }

.sidebar {
  width: 200px;
  background: #0f1923;
  color: #d0d8e4;
  padding: 20px 0;
  flex-shrink: 0;
}
.sidebar .brand { padding: 0 20px 20px; font-weight: 700; font-size: 18px; color: #fff; }
.sidebar nav a {
  display: block;
  padding: 10px 20px;
  color: #a0b4c8;
  text-decoration: none;
}
.sidebar nav a:hover, .sidebar nav a.active { background: var(--teal-dark); color: #fff; }

.main { flex: 1; padding: 30px; max-width: 1000px; }

.center-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; width: 100%;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}

h1 { font-size: 22px; margin: 0 0 20px; }
h2 { font-size: 17px; margin: 0 0 12px; }

label { display: block; font-size: 12px; color: var(--muted); margin: 12px 0 4px; }
input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 14px;
  font-family: inherit;
}
textarea { resize: vertical; }

button {
  cursor: pointer;
  border: none;
  border-radius: 5px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
}
.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-dark); }
.btn-secondary { background: #eef1f1; color: var(--ink); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-amber { background: var(--amber); color: #1a1a2e; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--muted); font-weight: 600; }
tr:hover td { background: #fafcfc; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge-draft { background: #f0e6d2; color: #8a6d1a; }
.badge-issued { background: #dcf3ef; color: var(--teal-dark); }

.error { color: var(--danger); font-size: 13px; margin: 8px 0; }
.hint { color: var(--muted); font-size: 12px; }

.row { display: flex; gap: 12px; }
.row > * { flex: 1; }

.item-row { display: grid; grid-template-columns: 1fr 80px 100px 100px 32px; gap: 8px; align-items: center; margin-bottom: 8px; }
.totals { margin-top: 16px; text-align: right; }
.totals div { margin: 4px 0; }
.totals .grand { font-size: 18px; font-weight: 700; }

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }