:root {
  --primary: #1e4fa3;
  --primary-dark: #163b7d;
  --bg: #f4f6fa;
  --card: #ffffff;
  --border: #e2e6ed;
  --text: #1f2937;
  --muted: #6b7280;
  --green: #1a7f4b;
  --green-bg: #e6f6ec;
  --red: #b3261e;
  --red-bg: #fce8e6;
  --yellow: #8a6100;
  --yellow-bg: #fff4d6;
  --blue: #1e4fa3;
  --blue-bg: #e8f0fd;
  --gray-bg: #eceff3;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.container-narrow { max-width: 520px; margin: 60px auto; padding: 0 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

h1, h2, h3 { margin-top: 0; }

.topbar {
  background: var(--primary);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar a { color: #fff; }
.topbar .brand { font-weight: 600; font-size: 18px; }
.topbar nav a { margin-left: 18px; font-size: 14px; opacity: .9; }
.topbar nav a:hover { opacity: 1; }

.layout { display: flex; min-height: calc(100vh - 56px); }
.sidebar {
  width: 220px;
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 18px 0;
}
.sidebar a {
  display: block;
  padding: 10px 22px;
  color: var(--text);
  font-size: 14.5px;
}
.sidebar a:hover, .sidebar a.active {
  background: var(--blue-bg);
  color: var(--primary);
  text-decoration: none;
  border-right: 3px solid var(--primary);
}
.content { flex: 1; padding: 24px; }

.form-group { margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=date], input[type=datetime-local], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14.5px;
  cursor: pointer;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #52596b; }
.btn-danger { background: var(--red); }
.btn-danger:hover { background: #8f1f19; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { background: #fafbfc; font-weight: 600; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #fafcff; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12.5px;
  font-weight: 600;
}
.badge-gray { background: var(--gray-bg); color: #444; }
.badge-blue { background: var(--blue-bg); color: var(--blue); }
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-red { background: var(--red-bg); color: var(--red); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow); }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.alert-success { background: var(--green-bg); color: var(--green); }
.alert-error { background: var(--red-bg); color: var(--red); }
.alert-info { background: var(--blue-bg); color: var(--blue); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .lbl { font-size: 13px; color: var(--muted); margin-top: 4px; }

.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px;}
.muted { color: var(--muted); font-size: 13px; }
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.link-box { background: var(--gray-bg); padding: 10px 14px; border-radius: 8px; font-family: monospace; font-size: 13px; word-break: break-all; }

footer.site-footer { text-align: center; padding: 20px; color: var(--muted); font-size: 13px; }