:root {
  --primary: #2c3e50;
  --primary-light: #34495e;
  --accent: #1abc9c;
  --accent-dark: #16a085;
  --danger: #e74c3c;
  --warning: #f39c12;
  --bg: #f4f6f8;
  --white: #ffffff;
  --text: #2c3e50;
  --border: #dfe6e9;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

header {
  background: var(--primary);
  color: var(--white);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 { font-size: 1.3rem; }

header nav a {
  color: var(--white);
  text-decoration: none;
  margin-left: 1.2rem;
  font-size: 0.95rem;
  opacity: 0.9;
}

header nav a:hover { opacity: 1; text-decoration: underline; }

.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.card {
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background 0.15s;
}

.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-dark); }

.btn-danger { background: var(--danger); color: var(--white); }
.btn-warning { background: var(--warning); color: var(--white); }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.85rem; margin-bottom: 0.3rem; font-weight: 600; }
.form-group input, .form-group select {
  width: 100%;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
}

.alert {
  padding: 0.8rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-warning { background: #fff3cd; color: #856404; border: 1px solid #ffeeba; }
.alert-info    { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.data-table th, table.data-table td {
  padding: 0.65rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.data-table th {
  background: var(--primary-light);
  color: var(--white);
  font-weight: 600;
}

table.data-table tr:hover { background: #f8f9fa; }

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.pagination a, .pagination span {
  padding: 0.4rem 0.7rem;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.85rem;
}

.pagination a { background: var(--white); border: 1px solid var(--border); color: var(--primary); }
.pagination a:hover { background: var(--bg); }
.pagination .current { background: var(--primary); color: var(--white); border: 1px solid var(--primary); }

.login-box {
  max-width: 360px;
  margin: 5rem auto;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 1rem;
}

.toolbar .form-group { margin-bottom: 0; flex: 1 1 220px; }

.mono { font-family: "SFMono-Regular", Consolas, monospace; }

.num { text-align: right; font-variant-numeric: tabular-nums; }