:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #eef3fb;
  --border: #d7e3f4;
  --text: #12263f;
  --text-muted: #5b7aa5;
  --primary: #1e6fe0;
  --primary-hover: #1558b8;
  --primary-soft: #e3efff;
  --accent: #1e6fe0;
  --danger: #dc3545;
  --danger-soft: #fbe3e6;
  --success: #17a673;
  --warning: #e0a51e;
  --shadow: 0 2px 10px rgba(30,111,224,.08);
}

[data-theme="dark"] {
  --bg: #0b0f0d;
  --surface: #121a15;
  --surface-2: #17231c;
  --border: #23392c;
  --text: #e6f5ec;
  --text-muted: #7fae92;
  --primary: #1fd670;
  --primary-hover: #16b85e;
  --primary-soft: #14311f;
  --accent: #1fd670;
  --danger: #ff5c6c;
  --danger-soft: #331519;
  --success: #1fd670;
  --warning: #e0c21e;
  --shadow: 0 2px 14px rgba(0,0,0,.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background .25s, color .25s;
}

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

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 250px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; align-items: center; gap: .6rem; font-size: 1.25rem; font-weight: 700; margin-bottom: 2rem; color: var(--text); }
.brand .logo { width: 38px; height: 38px; border-radius: 10px; background: var(--primary); display: grid; place-items: center; color: #fff; font-size: 1.2rem; }
[data-theme="dark"] .brand .logo { color: #0b0f0d; }

.nav-link { display: flex; align-items: center; gap: .7rem; padding: .7rem .9rem; border-radius: 10px; color: var(--text-muted); font-weight: 500; margin-bottom: .25rem; transition: .15s; }
.nav-link:hover { background: var(--surface-2); color: var(--text); }
.nav-link.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.75rem; border-bottom: 1px solid var(--border); background: var(--surface); }
.topbar h1 { font-size: 1.25rem; margin: 0; }

.content { padding: 1.75rem; }

.theme-toggle { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); width: 42px; height: 42px; border-radius: 10px; cursor: pointer; font-size: 1.1rem; }

.grid { display: grid; gap: 1.25rem; }
.grid-cards { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem; box-shadow: var(--shadow); }
.stat { display: flex; flex-direction: column; gap: .35rem; }
.stat .label { color: var(--text-muted); font-size: .85rem; }
.stat .value { font-size: 2rem; font-weight: 700; }
.stat .value.accent { color: var(--primary); }

.section-head { display: flex; align-items: center; justify-content: space-between; margin: 1.75rem 0 1rem; }
.section-head h2 { margin: 0; font-size: 1.1rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .8rem 1rem; border-bottom: 1px solid var(--border); font-size: .92rem; }
th { color: var(--text-muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
tr:last-child td { border-bottom: none; }

.badge { display: inline-block; padding: .25rem .65rem; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.badge.available { background: var(--primary-soft); color: var(--primary); }
.badge.booked { background: var(--warning); color: #3a2e00; }
.badge.in_use { background: var(--success); color: #fff; }
.badge.maintenance, .badge.cancelled { background: var(--danger-soft); color: var(--danger); }
.badge.completed { background: var(--surface-2); color: var(--text-muted); }

.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .6rem 1.1rem; border-radius: 10px; border: 1px solid transparent; font-weight: 600; font-size: .9rem; cursor: pointer; transition: .15s; }
.btn-primary { background: var(--primary); color: #fff; }
[data-theme="dark"] .btn-primary { color: #0b0f0d; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { background: var(--surface-2); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: .4rem .75rem; font-size: .82rem; }

.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; margin-bottom: .4rem; font-weight: 600; font-size: .9rem; }
input, select, textarea { width: 100%; padding: .65rem .8rem; border-radius: 10px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font-size: .92rem; font-family: inherit; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }

.alert { padding: .9rem 1.1rem; border-radius: 10px; margin-bottom: 1.25rem; font-weight: 500; }
.alert-success { background: var(--primary-soft); color: var(--primary); }
.alert-danger { background: var(--danger-soft); color: var(--danger); }

.flex { display: flex; }
.gap { gap: .6rem; }
.between { justify-content: space-between; }
.items-center { align-items: center; }
.muted { color: var(--text-muted); }
.mt { margin-top: 1rem; }
.row-tier { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: .6rem; align-items: end; margin-bottom: .6rem; }
.pagination { display: flex; gap: .3rem; list-style: none; padding: 0; margin-top: 1.25rem; flex-wrap: wrap; }
.pagination a, .pagination span { padding: .4rem .7rem; border-radius: 8px; border: 1px solid var(--border); color: var(--text); font-size: .85rem; }
.pagination .active span { background: var(--primary); color: #fff; border-color: var(--primary); }

@media (max-width: 780px) {
  .sidebar { position: fixed; z-index: 20; transform: translateX(-100%); transition: .25s; }
  .sidebar.open { transform: translateX(0); }
  .menu-btn { display: inline-flex; }
}
.menu-btn { display: none; }