:root {
  --sidebar-width: 240px;
  --topbar-height: 56px;

  /* Dark palette */
  --bg:            #0d1520;
  --bg-card:       #132035;
  --bg-card-alt:   #0f1929;
  --sidebar-from:  #071018;
  --sidebar-to:    #0a1a2e;
  --topbar-bg:     #0d1520;

  /* Brand */
  --accent:        #00537D;
  --accent-light:  #0ea5e9;
  --gold:          #D2BA15;

  /* Text */
  --text:          #cbd5e1;
  --text-muted:    #4e6180;
  --text-heading:  #e8edf4;

  /* Borders & shadows */
  --border:        rgba(255,255,255,0.07);
  --border-accent: rgba(0,83,125,0.4);
  --shadow:        0 4px 24px rgba(0,0,0,0.5);
  --shadow-sm:     0 2px 10px rgba(0,0,0,0.35);
}

/* ── Reset & base ─────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  -webkit-font-smoothing: antialiased;
}

/* ── Bootstrap overrides ─────────────────────────────────────────────────── */

.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: #003d5c;
  border-color: #003d5c;
  color: #fff;
}
.btn-outline-primary {
  color: var(--accent-light);
  border-color: var(--accent-light);
}
.btn-outline-primary:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-outline-secondary {
  color: var(--text-muted);
  border-color: var(--border);
  background: transparent;
}
.btn-outline-secondary:hover {
  background-color: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.15);
  color: var(--text);
}
.form-control,
.form-select {
  background-color: #0a1628;
  border-color: var(--border);
  color: var(--text);
}
.form-control:focus,
.form-select:focus {
  background-color: #0a1628;
  border-color: var(--accent-light);
  color: var(--text);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}
.form-control::placeholder { color: var(--text-muted); }
.form-label { color: var(--text); font-weight: 500; }
.form-text  { color: #7fa4c0 !important; }

.form-check-input {
  background-color: #0a1628;
  border-color: rgba(255,255,255,0.25);
}
.form-check-input:checked {
  background-color: var(--accent-light);
  border-color: var(--accent-light);
}
.form-check-label { color: var(--text); }

.border.rounded { border-color: var(--border) !important; background: var(--bg-card-alt); }

.table {
  --bs-table-bg: transparent;
  --bs-table-striped-bg: rgba(255,255,255,0.025);
  --bs-table-hover-bg: rgba(14,165,233,0.06);
  --bs-table-color: var(--text);
  --bs-table-border-color: var(--border);
  color: var(--text);
}
.table-light {
  --bs-table-bg: var(--bg-card-alt);
  --bs-table-color: var(--text-muted);
  --bs-table-border-color: var(--border);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  color: var(--text);
}
.card-header {
  background: var(--bg-card-alt) !important;
  border-bottom: 1px solid var(--border);
  color: var(--text-heading);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}

.alert-danger   { background: rgba(220,53,69,.15);  border-color: rgba(220,53,69,.3);  color: #f87171; }
.alert-success  { background: rgba(25,135,84,.15);  border-color: rgba(25,135,84,.3);  color: #4ade80; }
.alert-warning  { background: rgba(255,193,7,.12);  border-color: rgba(255,193,7,.3);  color: #fbbf24; }
.alert-info     { background: rgba(13,202,240,.12); border-color: rgba(13,202,240,.3); color: #67e8f9; }

/* ── Layout ──────────────────────────────────────────────────────────────── */

#wrapper {
  min-height: 100vh;
  display: flex;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */

.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: linear-gradient(180deg, var(--sidebar-from) 0%, var(--sidebar-to) 100%);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width 0.22s ease;
  border-right: 1px solid var(--border-accent);
  box-shadow: 4px 0 16px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-brand {
  color: #fff !important;
  min-height: 48px;
  padding: 0.5rem;
}

.sidebar-logo {
  width: 150px;
  height: auto;
  object-fit: contain;
  filter: brightness(1.1);
  transition: width 0.22s ease;
}

.sidebar .nav-link {
  color: #7fa4c0;
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  font-size: 0.875rem;
  transition: background 0.15s, color 0.15s, border-left 0.15s;
  border-left: 3px solid transparent;
  margin-bottom: 2px;
}

.sidebar .nav-link:hover {
  background: rgba(14,165,233,0.08);
  color: #e2e8f0;
  border-left-color: rgba(14,165,233,0.3);
}

.sidebar .nav-link.active {
  background: rgba(0,83,125,0.35);
  color: #fff;
  border-left-color: var(--accent-light);
  font-weight: 600;
  box-shadow: inset 0 0 20px rgba(14,165,233,0.05);
}

.sidebar .nav-link i {
  font-size: 1rem;
  opacity: 0.85;
}

.sidebar .nav-link.active i { opacity: 1; color: var(--accent-light); }

.sidebar-divider {
  border-color: var(--border-accent);
  opacity: 0.5;
}

.sidebar-footer {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Collapsed sidebar */
#wrapper.sidebar-collapsed .sidebar { width: 60px; }

#wrapper.sidebar-collapsed .sidebar-brand-text,
#wrapper.sidebar-collapsed .nav-link span,
#wrapper.sidebar-collapsed .sidebar-footer small,
#wrapper.sidebar-collapsed .sidebar-divider { display: none !important; }

#wrapper.sidebar-collapsed .sidebar-logo {
  width: 34px;
  height: 34px;
  margin: 0 auto;
}

#wrapper.sidebar-collapsed .nav-link {
  text-align: center;
  padding: 0.6rem;
  border-left-color: transparent !important;
}

#wrapper.sidebar-collapsed .nav-link i { margin-right: 0 !important; }

/* ── Topbar ──────────────────────────────────────────────────────────────── */

.topbar {
  height: var(--topbar-height);
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.topbar .navbar-brand,
.topbar .h6 {
  color: var(--text-heading) !important;
  font-weight: 600;
}

/* ── Content ─────────────────────────────────────────────────────────────── */

#page-content { min-width: 0; flex: 1; }

.main-content { min-height: calc(100vh - var(--topbar-height)); }

/* ── Stat cards ──────────────────────────────────────────────────────────── */

.stat-card {
  border: 1px solid var(--border) !important;
  border-top-width: 3px !important;
  position: relative;
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow) !important;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.02) 0%, transparent 60%);
  pointer-events: none;
}

.stat-card.border-success { border-top-color: #22c55e !important; }
.stat-card.border-primary { border-top-color: var(--accent-light) !important; }
.stat-card.border-warning { border-top-color: var(--gold) !important; }
.stat-card.border-danger  { border-top-color: #f87171 !important; }

.stat-card .stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.1;
}

.stat-card .stat-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.stat-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 12px !important;
}

/* ── Tables ──────────────────────────────────────────────────────────────── */

.table th {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.table td { vertical-align: middle; border-color: var(--border); }

.cursor-pointer { cursor: pointer; }

/* ── Badges ──────────────────────────────────────────────────────────────── */

.badge { font-weight: 500; font-size: 0.72rem; letter-spacing: 0.02em; }

.bg-success-subtle  { background: rgba(34,197,94,.15)  !important; }
.bg-warning-subtle  { background: rgba(251,191,36,.15) !important; }
.bg-danger-subtle   { background: rgba(248,113,113,.15)!important; }
.bg-primary-subtle  { background: rgba(14,165,233,.15) !important; }
.bg-secondary-subtle{ background: rgba(148,163,184,.1) !important; }

.text-success { color: #22c55e !important; }
.text-warning { color: var(--gold) !important; }
.text-danger  { color: #f87171 !important; }
.text-primary { color: var(--accent-light) !important; }
.text-muted   { color: var(--text-muted) !important; }

.border-success { border-color: #22c55e !important; }
.border-warning { border-color: var(--gold) !important; }
.border-danger  { border-color: #f87171 !important; }

/* ── Login page ──────────────────────────────────────────────────────────── */

.login-page {
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0,83,125,0.35) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(14,165,233,0.2) 0%, transparent 50%),
    linear-gradient(135deg, #060e1a 0%, #0a1628 50%, #071018 100%);
}

.login-card {
  border-radius: 16px;
  background: rgba(19,32,53,0.92);
  border: 1px solid rgba(14,165,233,0.15);
  backdrop-filter: blur(12px);
  box-shadow: 0 24px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(14,165,233,0.08);
}

.login-card h5  { color: var(--text-heading); }
.login-card small { color: var(--text-muted); }

.login-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 14px;
  filter: drop-shadow(0 4px 16px rgba(14,165,233,0.3));
}

/* ── Scrollbar ───────────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
  .sidebar { width: 60px; }

  .sidebar-brand-text,
  .sidebar .nav-link span,
  .sidebar-footer small,
  .sidebar-divider { display: none !important; }

  .sidebar .nav-link { text-align: center; padding: 0.6rem; border-left-color: transparent !important; }
  .sidebar-logo { width: 34px; height: 34px; margin: 0 auto; }
  .sidebar .nav-link i { margin-right: 0 !important; }
}