:root {
    --bg-main: #F4F7FB;
    --sidebar-bg: #172B4D;
    --sidebar-hover: #1e3a66;
    --sidebar-active: #2563EB;
    --primary: #2563EB;
    --primary-hover: #1d4ed8;
    --success: #16A34A;
    --danger: #DC2626;
    --warning: #D97706;
    --info: #0284C7;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --card-bg: #FFFFFF;
    --border-color: #E2E8F0;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --sidebar-width: 260px;
    --topbar-height: 64px;
}

[data-theme="dark"] {
    --bg-main: #0B1329;
    --sidebar-bg: #0F172A;
    --sidebar-hover: #1E293B;
    --card-bg: #1E293B;
    --text-main: #F1F5F9;
    --text-muted: #94A3B8;
    --border-color: #334155;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    color: #E2E8F0;
}

#sidebar.collapsed {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 1.25rem;
    font-weight: 700;
    font-size: 1.15rem;
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: #FFF;
    text-decoration: none;
}

.sidebar-nav {
    list-style: none;
    padding: 0.75rem 0;
    margin: 0;
}

.sidebar-section-header {
    padding: 0.6rem 1.25rem 0.25rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94A3B8;
    font-weight: 600;
}

.sidebar-nav .nav-item .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.25rem;
    color: #CBD5E1;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
}

.sidebar-nav .nav-item .nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #FFFFFF;
}

.sidebar-nav .nav-item .nav-link.active {
    background-color: rgba(37, 99, 235, 0.25);
    color: #FFFFFF;
    border-left-color: var(--primary);
    font-weight: 600;
}

.sidebar-nav .nav-item .nav-link i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* Main Content Area */
#main-wrapper {
    margin-left: var(--sidebar-width);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#main-wrapper.expanded {
    margin-left: 0;
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 990;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.btn-sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-main);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 6px;
}

.btn-sidebar-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* Cards & Widgets */
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    height: 100%;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.05);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
}

.stat-card .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 0.25rem;
}

.stat-card .stat-label {
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--text-muted);
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.table {
    color: var(--text-main);
    margin-bottom: 0;
}

.table th {
    background: rgba(0, 0, 0, 0.02);
    font-weight: 600;
    font-size: 0.825rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
}

.table td {
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 1rem;
    vertical-align: middle;
    font-size: 0.9rem;
}

.table-responsive {
    border-radius: 8px;
}

/* Badges */
.badge-strong { background-color: rgba(22, 163, 74, 0.15); color: #15803d; border: 1px solid rgba(22, 163, 74, 0.3); }
.badge-stable { background-color: rgba(2, 132, 199, 0.15); color: #0369a1; border: 1px solid rgba(2, 132, 199, 0.3); }
.badge-attention { background-color: rgba(217, 119, 6, 0.15); color: #b45309; border: 1px solid rgba(217, 119, 6, 0.3); }
.badge-danger-soft { background-color: rgba(220, 38, 38, 0.15); color: #b91c1c; border: 1px solid rgba(220, 38, 38, 0.3); }

/* Double entry verification pill */
.balance-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
}

.balance-pill.balanced {
    background-color: #DCFCE7;
    color: #166534;
}

.balance-pill.unbalanced {
    background-color: #FEE2E2;
    color: #991B1B;
}

/* Print View Styling */
@media print {
    #sidebar, .topbar, .btn-print-hide, .no-print {
        display: none !important;
    }
    #main-wrapper {
        margin-left: 0 !important;
    }
    body {
        background: #FFF !important;
        color: #000 !important;
    }
    .card {
        border: none !important;
        box-shadow: none !important;
    }
}

/* Responsive queries */
@media (max-width: 992px) {
    #sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    #sidebar.show-mobile {
        margin-left: 0;
    }
    #main-wrapper {
        margin-left: 0;
    }
}