:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-border: #dde1e6;
  --color-text: #1f2328;
  --color-muted: #5b6270;
  --color-primary: #2454ff;
  --color-primary-dark: #1a3fcc;
  --color-danger: #d1373f;
  --color-success: #1a7f4e;
  --color-warning: #b5790a;
  --radius: 10px;
  font-size: 16px;
}

* { box-sizing: border-box; }

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

.navbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  flex-wrap: wrap;
}

.navbar a {
  color: var(--color-text);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: var(--radius);
  font-weight: 500;
}

.navbar a:hover, .navbar a.active {
  background: var(--color-bg);
}

.navbar .brand {
  font-weight: 700;
  margin-right: 12px;
}

.navbar .spacer { flex: 1; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

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

.card h2, .card h3 { margin-top: 0; }

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.stat-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
}

.stat-tile .value { font-size: 1.8rem; font-weight: 700; }
.stat-tile .label { color: var(--color-muted); font-size: 0.9rem; }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--color-border);
}

th { color: var(--color-muted); font-weight: 600; font-size: 0.9rem; }

.table-wrap { overflow-x: auto; }

form .field { margin-bottom: 16px; }

label { display: block; font-weight: 600; margin-bottom: 4px; }

input[type=text], input[type=password], input[type=email], input[type=date],
input[type=number], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
}

textarea { min-height: 90px; }

.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  font-size: 1rem;
}

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

.btn.secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

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

.btn-row { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.badge.active { color: var(--color-success); border-color: var(--color-success); }
.badge.cancelled { color: var(--color-warning); border-color: var(--color-warning); }
.badge.ended { color: var(--color-muted); }

.flash {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-weight: 500;
}

.flash-success { background: #e5f6ee; color: var(--color-success); }
.flash-danger { background: #fbeaeb; color: var(--color-danger); }
.flash-info { background: #eaf0ff; color: var(--color-primary-dark); }
.flash-warning { background: #fdf3e0; color: var(--color-warning); }

.muted { color: var(--color-muted); }
.text-right { text-align: right; }

.login-wrap {
  max-width: 380px;
  margin: 60px auto;
}

.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-bar select, .filter-bar input { width: auto; }

@media (max-width: 640px) {
  .navbar { padding: 8px 10px; }
  .container { padding: 14px 10px 50px; }
}