:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --danger: #b91c1c;
  --success: #075985;
  --warning: #d97706;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 250px;
  background: #111827;
  color: #fff;
  padding: 20px;
  overflow: auto;
}
.brand { font-weight: 800; font-size: 22px; margin-bottom: 30px; }
nav { display: grid; gap: 8px; }
nav button {
  background: transparent;
  border: 0;
  color: #d1d5db;
  text-align: left;
  padding: 12px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 15px;
}
nav button.active, nav button:hover { background: #1f2937; color: #fff; }
.main { margin-left: 250px; padding: 24px; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}
h1 { margin: 0; font-size: 28px; }
p { color: var(--muted); }
.loginBox { display: flex; gap: 8px; }
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font: inherit;
}
textarea { resize: vertical; }
label { display: grid; gap: 6px; color: #374151; font-size: 13px; font-weight: 700; }
.loginBox input { width: 220px; }
.loginBox button, .btn {
  padding: 10px 14px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}
.btn:hover, .loginBox button:hover { filter: brightness(.95); }
.page { display: none; }
.page.active { display: block; }
.cards {
  display: grid;
  grid-template-columns: repeat(6, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.card, .panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 5px 18px rgba(15,23,42,.04);
}
.card { padding: 18px; }
.card span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.card strong { font-size: 22px; }
.panel { padding: 18px; margin-bottom: 18px; }
.panel h2 { margin: 0 0 14px; font-size: 18px; }
.tableWrap { overflow: auto; max-height: 65vh; border: 1px solid var(--border); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; min-width: 900px; background: #fff; font-size: 13px; }
th, td { padding: 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: #e5e7eb; position: sticky; top: 0; z-index: 2; text-align: left; }
tr:nth-child(even) td { background: #f8fafc; }
.positive { color: var(--success); font-weight: 700; }
.negative { color: var(--danger); font-weight: 700; }
.badge { padding: 4px 8px; border-radius: 999px; font-size: 12px; background: #e5e7eb; }
.formGrid {
  display: grid;
  grid-template-columns: repeat(4, minmax(180px, 1fr));
  gap: 14px;
  margin: 14px 0;
}
.formGrid .wide { grid-column: 1 / -1; }
.message { margin-top: 12px; font-weight: 700; }
.message.ok { color: var(--success); }
.message.err { color: var(--danger); }
@media (max-width: 1200px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .formGrid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { width: 225px; }
  .main { margin-left: 225px; }
}
@media (max-width: 760px) {
  .sidebar { position: static; width: auto; }
  .main { margin-left: 0; }
  .topbar { flex-direction: column; align-items: stretch; }
  .cards, .formGrid { grid-template-columns: 1fr; }
}