:root {
    --bs-primary: #1a365d; /* Deep Navy - elegant and mature */
    --bs-primary-rgb: 26, 54, 93;
    --bs-secondary: #b79344; /* Muted Gold - authentic and sophisticated */
    --bs-secondary-rgb: 183, 147, 68;
    --bs-body-bg: #f5f7f9; /* Sophisticated cool gray for the app background */
    --bs-body-color: #4a5568; /* Softer, readable dark gray */
    --bs-font-sans-serif: 'Inter', system-ui, -apple-system, sans-serif;
    --bs-heading-color: #2d3748; /* Dark slate for headings */
    --bs-link-color: #1a365d;
    --bs-link-hover-color: #b79344;
    --ouo-gold: #b79344;
}

body {
    font-family: var(--bs-font-sans-serif);
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
}

.bg-body-tertiary {
    background-color: var(--bs-body-bg) !important;
}

h1, h2, h3, h4, h5, h6, .display-1, .display-2, .display-3, .display-4, .display-5, .display-6, .card-title {
    font-family: 'Bitter', serif;
    color: var(--bs-heading-color);
    font-weight: 600;
}

/* Global button restyling */
.btn-primary {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: #0f274a !important;
    border-color: #0f274a !important;
    color: #fff;
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.2);
}

.btn-secondary {
    background-color: var(--bs-secondary);
    border-color: var(--bs-secondary);
    color: #ffffff;
}
.btn-secondary:hover, .btn-secondary:focus, .btn-secondary:active {
    background-color: #a37f39 !important;
    border-color: #a37f39 !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(183, 147, 68, 0.2);
}

/* Custom Gold accents */
.text-ouo-gold {
    color: var(--ouo-gold) !important;
}
.bg-ouo-gold {
    background-color: var(--ouo-gold) !important;
    color: #ffffff !important;
}
.btn-gold {
    background-color: var(--ouo-gold);
    border-color: var(--ouo-gold);
    color: #ffffff;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
}
.btn-gold:hover {
    background-color: #a37f39;
    border-color: #a37f39;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(183, 147, 68, 0.25);
}

/* Global Card styling - visual maturity */
.card, .app-content .card {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px; /* Slightly sharper, modern corners */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.04);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover, .app-content .card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}
.card-header {
    background-color: #ffffff;
    border-bottom: 1px solid #edf2f7;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
}
.card-header .card-title {
    margin-bottom: 0;
}

/* Override AdminLTE harsh card-primary outline */
.card-primary.card-outline {
    border-top: 3px solid var(--bs-primary);
}

/* Form and Input Elements */
.form-control, .form-select {
    border: 1px solid #cbd5e0;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    color: #4a5568;
    background-color: #ffffff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-control:focus, .form-select:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}
.form-label {
    font-weight: 500;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

/* Tables */
.table {
    color: #4a5568;
}
.table th {
    font-weight: 600;
    color: #2d3748;
    border-bottom-width: 1px;
    border-bottom-color: #e2e8f0;
    background-color: #f7fafc;
}
.table td {
    border-bottom-color: #edf2f7;
    vertical-align: middle;
}
.table-hover tbody tr:hover {
    background-color: #f7fafc;
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.4em 0.8em;
    border-radius: 4px;
}
.badge.text-bg-success, .badge.bg-success {
    background-color: #c6f6d5 !important;
    color: #22543d !important;
}
.badge.text-bg-info, .badge.bg-info {
    background-color: #ebf8ff !important;
    color: #2b6cb0 !important;
}
.badge.text-bg-warning, .badge.bg-warning {
    background-color: #fefcbf !important;
    color: #744210 !important;
}
.badge.text-bg-danger, .badge.bg-danger {
    background-color: #fed7d7 !important;
    color: #822727 !important;
}
.badge.text-bg-secondary, .badge.bg-secondary {
    background-color: #edf2f7 !important;
    color: #4a5568 !important;
}

/* Alerts */
.alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}
.alert-success { background-color: #f0fff4; color: #22543d; border-left: 4px solid #48bb78; }
.alert-info { background-color: #ebf8ff; color: #2b6cb0; border-left: 4px solid #4299e1; }
.alert-warning { background-color: #fffff0; color: #744210; border-left: 4px solid #ecc94b; }
.alert-danger { background-color: #fff5f5; color: #822727; border-left: 4px solid #f56565; }

/* AdminLTE Sidebar overrides */
.app-sidebar.bg-primary {
    background-color: var(--bs-primary) !important;
    border-right: none;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}
.app-sidebar.bg-primary .sidebar-brand {
    background-color: #122642 !important;
    color: #ffffff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.app-sidebar.bg-primary .sidebar-brand .brand-text {
    font-family: 'Bitter', serif;
    font-weight: 600;
}
.app-sidebar.bg-primary .nav-link {
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    border-radius: 6px;
    margin: 0.1rem 0.5rem;
}
.app-sidebar.bg-primary .nav-link:hover,
.app-sidebar.bg-primary .nav-link.active {
    background-color: rgba(255, 255, 255, 0.1) !important;
    color: #ffffff !important;
}
.app-sidebar.bg-primary .nav-item .nav-link i.nav-icon {
    color: inherit;
    opacity: 0.8;
}
.app-sidebar.bg-primary .nav-header {
    color: rgba(255, 255, 255, 0.4);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}
.app-sidebar.bg-primary .sidebar-search input {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-radius: 6px;
}
.app-sidebar.bg-primary .sidebar-search input:focus {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    box-shadow: none;
}

/* Navbar overrides */
.app-header.navbar {
    background-color: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}
.app-header.navbar .nav-link {
    color: #4a5568;
    font-weight: 500;
}
.app-header.navbar .nav-link:hover {
    color: var(--bs-primary);
}