:root {
  --navy: #1a365d;
  --navy-dark: #0f2744;
  --brass: #8b6914;
  --stone: #f6f4f0;
  --stone-dark: #e8e4dc;
  --ink: #1c1917;
  --muted: #57534e;
  --success: #2f6b4f;
  --danger: #9b2c2c;
  --card: #ffffff;
  --shadow: 0 10px 30px rgba(15, 39, 68, 0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--stone);
  color: var(--ink);
}
a { color: inherit; }
button, input, select, textarea { font: inherit; }
.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--navy-dark), var(--navy));
  padding: 24px;
}
.login-card {
  width: min(420px, 100%);
  background: var(--card);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.login-card h1 { margin: 0 0 6px; color: var(--navy); }
.login-card p { margin: 0 0 24px; color: var(--muted); }
label { display: block; font-size: 13px; margin: 12px 0 6px; color: var(--muted); }
input, select, textarea {
  width: 100%;
  border: 1px solid #d6d3d1;
  border-radius: 10px;
  padding: 10px 12px;
  background: #fff;
}
.btn {
  border: 0;
  border-radius: 10px;
  padding: 11px 16px;
  cursor: pointer;
  background: var(--navy);
  color: #fff;
  font-weight: 600;
}
.btn.ghost { background: transparent; color: var(--navy); border: 1px solid #d6d3d1; }
.btn.danger { background: var(--danger); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.error { color: var(--danger); font-size: 14px; margin-top: 10px; }
.layout { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar {
  background: var(--navy-dark);
  color: #e7eef8;
  padding: 24px 16px;
}
.brand { font-weight: 700; letter-spacing: .02em; margin-bottom: 28px; }
.nav-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  color: inherit;
  border: 0;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 4px;
  cursor: pointer;
}
.nav-btn.active, .nav-btn:hover { background: rgba(255,255,255,.08); }
.main { padding: 28px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; gap: 12px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.card, .stat {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.stat b { display: block; font-size: 28px; color: var(--navy); }
.table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.table th, .table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--stone-dark); }
.table tr { cursor: pointer; }
.table tr:hover { background: #faf8f5; }
.badge { display: inline-block; padding: 3px 8px; border-radius: 999px; background: var(--stone-dark); font-size: 12px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.muted { color: var(--muted); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}