:root {
    --sidebar-width: 250px;
    --navy: #0b3d2e;
    --navy-dark: #072a20;
    --accent: #c9a227;
}

body {
    background: #f4f6f9;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
}

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

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--navy) 0%, var(--navy-dark) 100%);
    color: #e8f0ec;
    min-height: 100vh;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    overflow-y: auto;
    transition: margin-left .25s ease;
    z-index: 1030;
}
.sidebar.collapsed { margin-left: calc(var(--sidebar-width) * -1); }

.sidebar-brand {
    padding: 1.25rem 1rem;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 1px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.sidebar-brand i { color: var(--accent); margin-right: .5rem; }

.sidebar .nav-section {
    padding: .75rem 1rem .25rem;
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(232,240,236,.5);
}

.sidebar .nav-link {
    color: #dfe9e4;
    padding: .55rem 1rem;
    font-size: .9rem;
    border-left: 3px solid transparent;
}
.sidebar .nav-link i { width: 22px; margin-right: 8px; }
.sidebar .nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar .nav-link.active { background: rgba(201,162,39,.15); border-left-color: var(--accent); color: #fff; font-weight: 600; }

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    transition: margin-left .25s ease;
    min-width: 0;
}
.main-content.expanded { margin-left: 0; }

.top-navbar {
    background: #fff;
    border-bottom: 1px solid #e5e9ee;
    padding: .6rem 1.25rem;
    position: sticky;
    top: 0;
    z-index: 1020;
}
.global-search input { width: 320px; }
.notif-badge { font-size: .6rem; position: absolute; top: 2px; right: -2px; }

.card { border: none; border-radius: .6rem; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.stat-card { border-radius: .6rem; color: #fff; padding: 1.25rem; }
.stat-card .stat-value { font-size: 1.9rem; font-weight: 700; }
.stat-card .stat-icon { font-size: 2.2rem; opacity: .35; }
.bg-navy { background: var(--navy); }
.bg-gold { background: var(--accent); }

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top left, #0b3d2e, #061c15 70%);
}
.login-card { border-radius: .75rem; overflow: hidden; max-width: 420px; width: 100%; }
.login-card .card-header { background: var(--navy); color: #fff; text-align: center; padding: 2rem 1.5rem 1.5rem; }

@media (max-width: 768px) {
    .sidebar { margin-left: calc(var(--sidebar-width) * -1); }
    .sidebar.show { margin-left: 0; }
    .main-content { margin-left: 0; }
}

/* ---------------------------------------------------------------
   Dark mode — toggled via body.dark-mode, saved in user_preferences
   --------------------------------------------------------------- */
body.dark-mode {
    background: #0f1512;
    color: #dde5e0;
}
body.dark-mode .top-navbar {
    background: #16201b;
    border-bottom-color: #24312a;
}
body.dark-mode .card {
    background: #16201b;
    color: #dde5e0;
    box-shadow: 0 1px 3px rgba(0,0,0,.4);
}
body.dark-mode .card-header {
    background: #1c2820 !important;
    border-bottom-color: #24312a;
    color: #dde5e0;
}
body.dark-mode .table {
    color: #dde5e0;
}
body.dark-mode .table thead {
    color: #a9bcb2;
}
body.dark-mode .table-hover tbody tr:hover {
    background: rgba(255,255,255,.04);
    color: #fff;
}
body.dark-mode .form-control,
body.dark-mode .form-select {
    background: #1c2820;
    border-color: #2c3b32;
    color: #dde5e0;
}
body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus {
    background: #1c2820;
    color: #fff;
}
body.dark-mode .modal-content {
    background: #16201b;
    color: #dde5e0;
}
body.dark-mode .text-muted { color: #8fa197 !important; }
body.dark-mode a { color: #7fc4a3; }
body.dark-mode .dropdown-menu { background: #16201b; color: #dde5e0; }
body.dark-mode .dropdown-item { color: #dde5e0; }
body.dark-mode .dropdown-item:hover { background: #1c2820; color: #fff; }
body.dark-mode .list-group-item { background: #16201b; color: #dde5e0; border-color: #24312a; }
body.dark-mode .nav-tabs .nav-link { color: #a9bcb2; }
body.dark-mode .nav-tabs .nav-link.active { background: #16201b; color: #fff; border-color: #24312a #24312a #16201b; }