:root {
  --bg-primary: #0f1420;
  --bg-secondary: #161d2e;
  --card-bg: #1a2236;
  --sidebar-bg: #131a29;
  --text-primary: #e7ebf3;
  --text-secondary: #93a0b8;
  --border-color: #263049;
  --accent: #4f7cff;
  --accent-soft: rgba(79, 124, 255, 0.14);
  --success: #2fd480;
  --warning: #f5b942;
  --danger: #f2545b;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: "Segoe UI", Roboto, -apple-system, sans-serif;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #7fa0ff; }

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  flex-shrink: 0;
  transition: margin-left .2s ease;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar.collapsed { margin-left: -260px; }
.sidebar .brand { padding: 1.25rem 1.25rem 1rem; font-weight: 700; font-size: 1.1rem; letter-spacing: .3px; }
.sidebar .brand span { color: var(--accent); }
.sidebar-section { padding: .5rem 1.25rem .25rem; font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-secondary); margin-top: .5rem; }
.sidebar-link {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem 1.25rem; color: var(--text-secondary);
  border-left: 3px solid transparent; font-size: .92rem;
}
.sidebar-link:hover { background: rgba(255,255,255,.03); color: var(--text-primary); }
.sidebar-link.active { color: var(--text-primary); background: var(--accent-soft); border-left-color: var(--accent); }

.main { flex: 1; min-width: 0; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: .85rem 1.5rem; border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary); position: sticky; top: 0; z-index: 20;
}
.content { padding: 1.5rem; }

/* ---------- Cards ---------- */
.stat-card, .card-panel {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}
.stat-card .stat-label { color: var(--text-secondary); font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; }
.stat-card .stat-value { font-size: 1.7rem; font-weight: 700; margin-top: .2rem; }
.stat-card .stat-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; background: var(--accent-soft); color: var(--accent); }

/* ---------- Badges ---------- */
.badge-status { font-size: .72rem; padding: .28rem .55rem; border-radius: 20px; font-weight: 600; letter-spacing: .02em; }
.badge-online { background: rgba(47,212,128,.15); color: var(--success); }
.badge-degraded { background: rgba(245,185,66,.15); color: var(--warning); }
.badge-offline, .badge-error { background: rgba(242,84,91,.15); color: var(--danger); }
.badge-recovering { background: rgba(79,124,255,.15); color: var(--accent); }
.badge-disabled { background: rgba(147,160,184,.15); color: var(--text-secondary); }

/* ---------- Tables ---------- */
.table-dark-custom { width: 100%; border-collapse: separate; border-spacing: 0; }
.table-dark-custom th {
  text-align: left; font-size: .72rem; text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-secondary); padding: .7rem .9rem; border-bottom: 1px solid var(--border-color);
}
.table-dark-custom td { padding: .7rem .9rem; border-bottom: 1px solid var(--border-color); font-size: .9rem; }
.table-dark-custom tr:hover td { background: rgba(255,255,255,.02); }

/* ---------- Mobile cards for tables ---------- */
.mobile-cards { display: none; }
@media (max-width: 767px) {
  .table-desktop { display: none; }
  .mobile-cards { display: block; }
  .record-card {
    background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius);
    padding: .9rem 1rem; margin-bottom: .75rem;
  }
  .record-card .rc-title { font-weight: 600; margin-bottom: .3rem; }
  .record-card .rc-row { display: flex; justify-content: space-between; font-size: .85rem; padding: .15rem 0; color: var(--text-secondary); }
  .record-card .rc-actions { margin-top: .6rem; display: flex; gap: .5rem; }
  .sidebar { position: fixed; left: 0; margin-left: -260px; z-index: 1050; box-shadow: 0 0 40px rgba(0,0,0,.5); }
  .sidebar.mobile-open { margin-left: 0; }
}

/* ---------- Forms / misc ---------- */
.form-control, .form-select {
  background: var(--bg-secondary); border: 1px solid var(--border-color); color: var(--text-primary);
}
.form-control:focus, .form-select:focus {
  background: var(--bg-secondary); color: var(--text-primary); border-color: var(--accent);
  box-shadow: 0 0 0 .2rem var(--accent-soft);
}
.form-control::placeholder { color: var(--text-secondary); }
label.form-label { color: var(--text-secondary); font-size: .85rem; }

.btn-accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-accent:hover { background: #3d68f0; border-color: #3d68f0; color: #fff; }

.modal-content { background: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-primary); }
.modal-header, .modal-footer { border-color: var(--border-color); }

.login-wrapper {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg-primary);
}
.login-card { width: 380px; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 2rem; }

.toast-container-custom { position: fixed; top: 1rem; right: 1rem; z-index: 2000; }

.event-item { display: flex; gap: .6rem; padding: .5rem 0; border-bottom: 1px dashed var(--border-color); font-size: .87rem; }
.event-item:last-child { border-bottom: none; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }