/**
 * Sipway Online School Operations Management System (SOMS)
 * Unified Design System — Red, Black, White & Gold Identity
 */

:root {
    /* Core Brand Palette */
    --brand-red: #B5121B;
    --brand-red-dark: #850D14;
    --brand-red-subtle: #FDF2F2;
    --brand-black: #171717;
    --brand-black-secondary: #252525;
    --brand-gold: #D4AF37;
    --brand-gold-dark: #B59024;
    --brand-gold-light: #F4E7BD;
    --brand-white: #FFFFFF;
    --brand-bg: #F5F5F7;
    --brand-border: #E5E5E5;
    --brand-text-secondary: #6B7280;

    /* Semantic Status Colors */
    --brand-success: #15803D;
    --brand-success-subtle: #ECFDF5;
    --brand-warning: #B45309;
    --brand-warning-subtle: #FFFBEB;
    --brand-danger: #B5121B;
    --brand-info: #334155;

    /* Layout Tokens */
    --sidebar-width: 256px;
    --sidebar-collapsed-width: 68px;
    --topbar-height: 56px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --shadow-sm: 0 1px 2px rgba(23, 23, 23, 0.05);
    --shadow-md: 0 4px 12px rgba(23, 23, 23, 0.08);
    --shadow-lg: 0 12px 28px rgba(23, 23, 23, 0.14);

    /* Legacy Variable Aliases (Preserves inline references across modules) */
    --sipway-red: var(--brand-red);
    --sipway-red-dark: var(--brand-red-dark);
    --sipway-red-light: var(--brand-red-subtle);
    --sipway-black: var(--brand-black);
    --sipway-dark-gray: var(--brand-black-secondary);
    --sipway-sidebar-bg: var(--brand-black);
    --sipway-sidebar-hover: var(--brand-black-secondary);
    --sipway-body-bg: var(--brand-bg);
    --sipway-card-bg: var(--brand-white);
    --sipway-border: var(--brand-border);
    --sipway-text: var(--brand-black);
    --sipway-text-muted: var(--brand-text-secondary);
    --sipway-success: var(--brand-success);
    --sipway-warning: var(--brand-warning);
    --sipway-danger: var(--brand-danger);
    --sipway-info: var(--brand-info);

    /* Bootstrap 5 Root Token Overrides */
    --bs-font-sans-serif: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --bs-body-font-family: var(--bs-font-sans-serif);
    --bs-body-font-size: 0.84375rem; /* 13.5px */
    --bs-body-line-height: 1.5;
    --bs-body-color: var(--brand-black);
    --bs-body-bg: var(--brand-bg);
    --bs-border-color: var(--brand-border);
    --bs-primary: var(--brand-red);
    --bs-primary-rgb: 181, 18, 27;
    --bs-danger: var(--brand-red);
    --bs-danger-rgb: 181, 18, 27;
    --bs-secondary: var(--brand-text-secondary);
    --bs-secondary-rgb: 107, 114, 128;
    --bs-link-color: var(--brand-red);
    --bs-link-hover-color: var(--brand-red-dark);
    --bs-link-color-rgb: 181, 18, 27;
    --bs-link-hover-color-rgb: 133, 13, 20;
}

/* ============================================================================
   1. TYPOGRAPHY & BASE SURFACE
   ============================================================================ */
html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--bs-font-sans-serif);
    font-size: 13.5px;
    font-weight: 400;
    line-height: 1.5;
    background-color: var(--brand-bg);
    color: var(--brand-black);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--brand-red);
    transition: color 0.15s ease;
}

a:hover {
    color: var(--brand-red-dark);
}

/* Controlled Heading Hierarchy (Compact & Balanced) */
main h1, main .h1,
main h2, main .h2 {
    font-size: 21px;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--brand-black);
}

main h3, main .h3 {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.015em;
    color: var(--brand-black);
}

main h4, main .h4 {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: -0.01em;
    color: var(--brand-black);
}

main h5, main .h5 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--brand-black);
}

main h6, main .h6 {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--brand-black);
}

/* Keep metric values tabular and compact inside KPI tiles */
main .kpi-card h3,
main .kpi-card .h3,
main .card .h4.font-monospace,
main .card .h5.font-monospace {
    font-size: 19px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

main .display-4,
main .display-6 {
    font-size: 2.25rem;
    font-weight: 600;
}

/* Typography & Utility Helpers */
.fs-7 {
    font-size: 12.5px !important;
}

.fs-8 {
    font-size: 11.5px !important;
}

.letter-spacing-1 {
    letter-spacing: 0.05em;
}

.text-muted,
.text-secondary {
    color: var(--brand-text-secondary) !important;
}

.font-monospace {
    font-variant-numeric: tabular-nums;
}

code {
    color: var(--brand-red-dark);
    background-color: var(--brand-red-subtle);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    font-size: 12px;
}

.text-gold {
    color: var(--brand-gold-dark) !important;
}

.bg-gold {
    background-color: var(--brand-gold) !important;
    color: var(--brand-black) !important;
}

.bg-gold-subtle {
    background-color: var(--brand-gold-light) !important;
    color: var(--brand-black) !important;
    border: 1px solid var(--brand-gold) !important;
}

.border-gold {
    border-color: var(--brand-gold) !important;
}

.breadcrumb {
    font-size: 12px;
    margin-bottom: 0.3rem;
}

.breadcrumb-item a {
    color: var(--brand-text-secondary);
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb-item a:hover {
    color: var(--brand-red);
}

.breadcrumb-item.active {
    color: var(--brand-black);
    font-weight: 600;
}

/* ============================================================================
   2. TOP HEADER / NAVBAR
   ============================================================================ */
.top-navbar {
    background-color: var(--brand-white);
    border-bottom: 2px solid var(--brand-red);
    box-shadow: var(--shadow-sm);
    z-index: 1030;
    height: var(--topbar-height);
    min-height: var(--topbar-height);
    position: sticky;
    top: 0;
}

.brand-logo-img {
    height: 34px !important;
    max-height: 34px !important;
    width: auto !important;
    max-width: 80px !important;
    object-fit: contain !important;
    flex-shrink: 0 !important;
    display: inline-block !important;
    transition: transform 0.15s ease;
}

.brand-logo-img:hover {
    transform: scale(1.03);
}

.brand-title {
    font-weight: 700 !important;
    color: var(--brand-black) !important;
    font-size: 14.5px !important;
    line-height: 1.15 !important;
    margin: 0 !important;
    letter-spacing: -0.015em !important;
}

.brand-subtitle {
    font-size: 10.5px !important;
    color: var(--brand-text-secondary) !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.06em !important;
    line-height: 1.15 !important;
    margin-top: 1px !important;
}

.brand-soms-pill {
    background-color: var(--brand-red);
    color: var(--brand-white);
    font-size: 10px;
    font-weight: 700;
    padding: 0.12rem 0.42rem;
    border-radius: 4px;
    letter-spacing: 0.06em;
    border-bottom: 1.5px solid var(--brand-gold);
}

.platform-pill {
    background-color: var(--brand-bg);
    color: var(--brand-black);
    border: 1px solid var(--brand-border);
    border-left: 3px solid var(--brand-gold);
    font-size: 11.5px;
    font-weight: 500;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
}

.sidebar-collapse-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--brand-border);
    background-color: var(--brand-white);
    color: var(--brand-black);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: all 0.15s ease;
}

.sidebar-collapse-btn:hover {
    background-color: var(--brand-black);
    border-color: var(--brand-black);
    color: var(--brand-gold);
}

/* ============================================================================
   3. SHELL LAYOUT & SIDEBAR (DEEP BLACK + GOLD + RED)
   ============================================================================ */
.app-wrapper {
    display: flex;
    flex: 1 1 auto;
    min-height: calc(100vh - var(--topbar-height) - 46px);
}

.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--brand-black);
    color: #E5E5E5;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: var(--topbar-height);
    height: calc(100vh - var(--topbar-height));
    max-height: calc(100vh - var(--topbar-height));
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: #3A3A3A var(--brand-black);
    border-right: 1px solid #2A2A2A;
    transition: width 0.2s ease, left 0.2s ease;
}

.app-sidebar::-webkit-scrollbar {
    width: 5px;
}

.app-sidebar::-webkit-scrollbar-track {
    background: var(--brand-black);
}

.app-sidebar::-webkit-scrollbar-thumb {
    background: #3A3A3A;
    border-radius: 3px;
}

.app-sidebar::-webkit-scrollbar-thumb:hover {
    background: #525252;
}

.sidebar-brand-bar {
    background-color: #111111;
    border-bottom: 1px solid #2A2A2A;
    padding: 0.65rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    flex-shrink: 0;
}

.sidebar-brand-bar .sidebar-bar-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #E5E5E5;
    white-space: nowrap;
}

.sidebar-brand-bar .sidebar-version-badge {
    font-size: 10px;
    font-weight: 600;
    padding: 0.12rem 0.45rem;
    border-radius: 4px;
    background-color: var(--brand-black-secondary);
    color: var(--brand-gold);
    border: 1px solid rgba(212, 175, 55, 0.35);
}

.sidebar-header {
    padding: 0.6rem 1rem;
    margin-top: 0.35rem;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #9CA3AF;
    font-weight: 600;
    border-bottom: 1px solid #242424;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.sidebar-header:hover {
    color: var(--brand-white);
    background-color: var(--brand-black-secondary);
}

.sidebar-header.sidebar-header-active {
    color: var(--brand-gold-light);
    border-left: 3px solid var(--brand-gold);
    padding-left: calc(1rem - 3px);
    background-color: rgba(212, 175, 55, 0.08);
}

.sidebar-header .section-toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    color: #9CA3AF;
    transition: transform 0.2s ease, color 0.15s ease;
    flex-shrink: 0;
}

.sidebar-header:hover .section-toggle-icon,
.sidebar-header.sidebar-header-active .section-toggle-icon {
    color: var(--brand-gold);
}

.sidebar-header.collapsed .section-toggle-icon {
    transform: rotate(-90deg);
}

.sidebar-section-content.collapsed {
    display: none;
}

.sidebar-nav {
    list-style: none;
    padding: 0.5rem 0 0.75rem 0;
    margin: 0;
    flex-grow: 1;
}

.sidebar-nav .nav-item {
    margin: 0.12rem 0.55rem;
}

.sidebar-nav .nav-link {
    color: #D4D4D8;
    padding: 0.52rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    white-space: nowrap;
}

.sidebar-nav .nav-link .nav-icon {
    font-size: 17px;
    line-height: 1;
    width: 20px;
    text-align: center;
    color: #9CA3AF;
    flex-shrink: 0;
    transition: color 0.15s ease, transform 0.15s ease;
}

.sidebar-nav .nav-link .nav-label {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav .nav-link:hover {
    color: var(--brand-white);
    background-color: var(--brand-black-secondary);
}

.sidebar-nav .nav-link:hover .nav-icon {
    color: var(--brand-gold);
}

.sidebar-nav .nav-link.active {
    color: var(--brand-white);
    background: linear-gradient(90deg, var(--brand-red) 0%, var(--brand-red-dark) 100%);
    border-left-color: var(--brand-gold);
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(181, 18, 27, 0.35);
}

.sidebar-nav .nav-link.active .nav-icon {
    color: var(--brand-gold-light);
}

/* Highlighted External Portal Link inside sidebar */
.sidebar-nav .nav-link.nav-link-gold {
    color: var(--brand-gold-light);
    background-color: rgba(212, 175, 55, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.25);
}

.sidebar-nav .nav-link.nav-link-gold .nav-icon {
    color: var(--brand-gold);
}

.sidebar-nav .nav-link.nav-link-gold:hover {
    background-color: rgba(212, 175, 55, 0.18);
    color: var(--brand-white);
}

/* Fallback if legacy dot exists anywhere */
.sidebar-nav .nav-link .status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    margin-right: 0.25rem;
    background-color: #9CA3AF;
    flex-shrink: 0;
}

.sidebar-nav .nav-link.active .status-dot {
    background-color: var(--brand-gold);
}

.sidebar-nav .badge-subtle {
    font-size: 10px;
    font-weight: 600;
    margin-left: auto;
    padding: 0.14rem 0.42rem;
    border-radius: 4px;
    background-color: #2A2A2A;
    color: #A3A3A3;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}

.sidebar-nav .nav-link.active .badge-subtle {
    background-color: rgba(23, 23, 23, 0.35);
    color: var(--brand-gold-light);
}

.sidebar-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid #2A2A2A;
    background-color: #121212;
    font-size: 11px;
    color: #9CA3AF;
    line-height: 1.5;
}

.sidebar-footer strong {
    color: #E5E5E5;
}

/* Collapsed Desktop Sidebar Mode (Width 68px, centered icons, zero layout jump) */
@media (min-width: 992px) {
    .app-wrapper.sidebar-collapsed .app-sidebar {
        width: var(--sidebar-collapsed-width);
    }

    .app-wrapper.sidebar-collapsed .sidebar-brand-bar .sidebar-bar-title {
        display: none;
    }

    .app-wrapper.sidebar-collapsed .sidebar-brand-bar {
        justify-content: center;
        padding: 0.65rem 0.4rem;
    }

    .app-wrapper.sidebar-collapsed .sidebar-header,
    .app-wrapper.sidebar-collapsed .sidebar-nav .nav-label,
    .app-wrapper.sidebar-collapsed .sidebar-nav .badge-subtle,
    .app-wrapper.sidebar-collapsed .sidebar-footer {
        display: none !important;
    }

    .app-wrapper.sidebar-collapsed .sidebar-section-content.collapsed {
        display: block; /* Keep icon items accessible in rail mode */
    }

    .app-wrapper.sidebar-collapsed .sidebar-nav .nav-item {
        margin: 0.2rem 0.45rem;
    }

    .app-wrapper.sidebar-collapsed .sidebar-nav .nav-link {
        justify-content: center;
        padding: 0.58rem 0;
        border-left-width: 0;
        border-radius: var(--radius-sm);
    }

    .app-wrapper.sidebar-collapsed .sidebar-nav .nav-link.active {
        box-shadow: inset 3px 0 0 var(--brand-gold);
    }

    .app-wrapper.sidebar-collapsed .sidebar-nav .nav-link .nav-icon {
        font-size: 18px;
        width: auto;
        margin: 0;
    }
}

/* ============================================================================
   4. MAIN CONTENT & SURFACES
   ============================================================================ */
.app-content {
    flex: 1 1 auto;
    min-width: 0;
    padding: 1.25rem 1.5rem;
    overflow-x: hidden;
    background-color: var(--brand-bg);
}

.card {
    background-color: var(--brand-white);
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.card-header {
    background-color: var(--brand-white);
    border-bottom: 1px solid var(--brand-border);
    padding: 0.75rem 1rem;
    font-size: 14px;
    font-weight: 600;
    color: var(--brand-black);
}

.card-header.bg-light,
.card-footer.bg-light {
    background-color: #FAFAFB !important;
}

.card-clean {
    background-color: var(--brand-white);
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.25rem;
}

.card-clean .card-header {
    background-color: var(--brand-white);
    border-bottom: 1px solid var(--brand-border);
    padding: 0.75rem 1rem;
    font-weight: 600;
    font-size: 14.5px;
    color: var(--brand-black);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-clean .card-body {
    padding: 1rem;
}

/* Premium KPI / Stat Cards */
.kpi-card {
    background: var(--brand-white);
    border: 1px solid var(--brand-border);
    border-left: 4px solid var(--brand-red);
    border-radius: var(--radius-md);
    padding: 0.9rem 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
}

.kpi-card.kpi-gold {
    border-left-color: var(--brand-gold);
}

.kpi-card.kpi-black {
    border-left-color: var(--brand-black);
}

.kpi-card .kpi-label {
    font-size: 11px;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--brand-text-secondary);
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.kpi-card .kpi-value {
    font-size: 19px;
    font-weight: 700;
    color: var(--brand-black);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.kpi-card .kpi-sub {
    font-size: 11.5px;
    color: var(--brand-text-secondary);
    margin-top: 0.25rem;
}

/* Override harsh Bootstrap border-primary accents inside dashboard stat cards to harmonize Red/Gold/Black */
.card.border-primary,
.border-start.border-primary {
    border-color: var(--brand-black) !important;
}

.card.border-warning,
.border-start.border-warning {
    border-color: var(--brand-gold) !important;
}

.card.border-info,
.border-start.border-info {
    border-color: #475569 !important;
}

.card.border-danger,
.border-start.border-danger {
    border-color: var(--brand-red) !important;
}

/* Highlighted Payroll Figure Panels (Section 9) */
.payroll-hero-card {
    background: linear-gradient(135deg, var(--brand-black) 0%, var(--brand-black-secondary) 100%);
    color: var(--brand-white);
    border: 1px solid #333333;
    border-top: 3px solid var(--brand-gold);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.payroll-payable-highlight {
    background-color: var(--brand-gold-light);
    border: 1px solid var(--brand-gold);
    border-left: 4px solid var(--brand-gold-dark);
    border-radius: var(--radius-sm);
    color: var(--brand-black);
}

/* Launchpad Navigation Cards */
.launchpad-card {
    background-color: var(--brand-white);
    border: 1px solid var(--brand-border);
    border-top: 3px solid var(--brand-black);
    border-radius: var(--radius-md);
    padding: 0.95rem 1rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.15s ease, border-top-color 0.15s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.launchpad-card:hover {
    box-shadow: var(--shadow-md);
    border-top-color: var(--brand-red);
}

.launchpad-card .launchpad-title {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--brand-black);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.65rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--brand-border);
}

.launchpad-item-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.45rem 0.55rem;
    border-radius: var(--radius-sm);
    color: var(--brand-black);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: background-color 0.15s ease, color 0.15s ease;
    margin-bottom: 0.2rem;
}

.launchpad-item-link:hover {
    background-color: var(--brand-red-subtle);
    color: var(--brand-red);
}

.launchpad-item-link .item-left {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.launchpad-item-link .item-icon {
    width: 26px;
    height: 26px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13.5px;
    background-color: var(--brand-bg);
    color: var(--brand-black);
    transition: background-color 0.15s ease, color 0.15s ease;
}

.launchpad-item-link:hover .item-icon {
    background-color: var(--brand-red);
    color: var(--brand-white);
}

/* ============================================================================
   5. COMPACT FORMS & INPUTS (38-40px height, crisp focus & disabled states)
   ============================================================================ */
.form-label {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--brand-black);
    margin-bottom: 0.35rem;
}

.form-control,
.form-select {
    min-height: 38px;
    height: 38px;
    padding: 0.4rem 0.72rem;
    font-size: 13px;
    font-weight: 400;
    color: var(--brand-black);
    background-color: var(--brand-white);
    border: 1px solid #D4D4D8;
    border-radius: var(--radius-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.form-control-sm,
.form-select-sm {
    min-height: 36px;
    height: 36px;
    padding: 0.32rem 0.65rem;
    font-size: 12.5px;
}

.form-control-lg,
.form-select-lg {
    min-height: 40px;
    height: 40px;
    padding: 0.45rem 0.85rem;
    font-size: 14px;
}

textarea.form-control,
textarea.form-control-sm,
.form-select[multiple],
.form-select[size]:not([size="1"]) {
    height: auto;
    min-height: 76px;
}

input[type="file"].form-control,
input[type="file"].form-control-sm {
    padding-top: 0.42rem;
}

.form-control::placeholder {
    color: #9CA3AF;
    font-size: 12.5px;
}

.form-control:focus,
.form-select:focus {
    color: var(--brand-black);
    background-color: var(--brand-white);
    border-color: var(--brand-red);
    box-shadow: 0 0 0 3px rgba(181, 18, 27, 0.14);
    outline: none;
}

.form-control:disabled,
.form-control[readonly],
.form-select:disabled {
    background-color: #F3F4F6 !important;
    border-color: var(--brand-border);
    color: #4B5563;
    cursor: not-allowed;
    opacity: 1;
}

.input-group-text {
    min-height: 38px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--brand-black);
    background-color: var(--brand-bg);
    border: 1px solid #D4D4D8;
    border-radius: var(--radius-sm);
}

.input-group-sm > .input-group-text {
    min-height: 36px;
    font-size: 12px;
}

.form-text {
    font-size: 11.5px;
    color: var(--brand-text-secondary);
    margin-top: 0.25rem;
}

.form-check-input:checked {
    background-color: var(--brand-red);
    border-color: var(--brand-red);
}

.form-check-input:focus {
    border-color: var(--brand-red);
    box-shadow: 0 0 0 0.2rem rgba(181, 18, 27, 0.2);
}

/* Form Section Header Helper */
.form-section-heading {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--brand-black);
    padding-bottom: 0.4rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--brand-border);
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

/* ============================================================================
   6. UNIFIED BUTTONS & ACTION CONTROLS
   ============================================================================ */
.btn {
    font-size: 12.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    padding: 0.42rem 0.85rem;
    line-height: 1.35;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    transition: all 0.15s ease;
}

.btn-sm {
    font-size: 12px;
    font-weight: 600;
    padding: 0.34rem 0.72rem;
    border-radius: var(--radius-sm);
}

.btn-xs {
    font-size: 11px;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.btn-lg {
    font-size: 13.5px;
    padding: 0.52rem 1.05rem;
}

/* Primary & Danger -> Consistent Brand Red (#B5121B) */
.btn-sipway-primary,
.btn-primary,
.btn-danger {
    background-color: var(--brand-red);
    border-color: var(--brand-red);
    color: var(--brand-white);
}

.btn-sipway-primary:hover,
.btn-sipway-primary:focus,
.btn-primary:hover,
.btn-primary:focus,
.btn-danger:hover,
.btn-danger:focus {
    background-color: var(--brand-red-dark);
    border-color: var(--brand-red-dark);
    color: var(--brand-white);
    box-shadow: 0 2px 6px rgba(181, 18, 27, 0.25);
}

.btn-outline-primary,
.btn-outline-danger {
    color: var(--brand-red);
    border-color: var(--brand-red);
    background-color: transparent;
}

.btn-outline-primary:hover,
.btn-outline-danger:hover {
    background-color: var(--brand-red);
    border-color: var(--brand-red);
    color: var(--brand-white);
}

/* Secondary -> Clean White / Subtle Gray with Thin Border */
.btn-sipway-secondary,
.btn-secondary,
.btn-outline-secondary,
.btn-light {
    background-color: var(--brand-white);
    border-color: #D4D4D8;
    color: var(--brand-black);
}

.btn-sipway-secondary:hover,
.btn-secondary:hover,
.btn-outline-secondary:hover,
.btn-light:hover {
    background-color: var(--brand-bg);
    border-color: #A1A1AA;
    color: var(--brand-black);
}

/* Gold Accent Button */
.btn-sipway-gold,
.btn-gold {
    background-color: var(--brand-gold);
    border-color: var(--brand-gold-dark);
    color: var(--brand-black);
    font-weight: 700;
}

.btn-sipway-gold:hover,
.btn-sipway-gold:focus,
.btn-gold:hover,
.btn-gold:focus {
    background-color: #C39D2B;
    border-color: #A5821C;
    color: var(--brand-black);
    box-shadow: 0 2px 6px rgba(212, 175, 55, 0.35);
}

.btn-outline-gold {
    background-color: var(--brand-white);
    border-color: var(--brand-gold);
    color: #8A6D14;
}

.btn-outline-gold:hover {
    background-color: var(--brand-gold);
    color: var(--brand-black);
}

/* Deep Black Button */
.btn-sipway-dark,
.btn-dark {
    background-color: var(--brand-black);
    border-color: var(--brand-black);
    color: var(--brand-white);
}

.btn-sipway-dark:hover,
.btn-dark:hover {
    background-color: var(--brand-black-secondary);
    border-color: var(--brand-black-secondary);
    color: var(--brand-gold-light);
}

.btn-outline-dark {
    border-color: var(--brand-black);
    color: var(--brand-black);
}

.btn-outline-dark:hover {
    background-color: var(--brand-black);
    border-color: var(--brand-black);
    color: var(--brand-white);
}

/* Keep Approve / Mark Paid Semantic Success crisp */
.btn-success {
    background-color: var(--brand-success);
    border-color: var(--brand-success);
    color: var(--brand-white);
}

.btn-success:hover {
    background-color: #166534;
    border-color: #166534;
}

.btn-warning {
    background-color: var(--brand-gold-light);
    border-color: var(--brand-gold);
    color: var(--brand-black);
}

.btn-warning:hover {
    background-color: var(--brand-gold);
    border-color: var(--brand-gold-dark);
    color: var(--brand-black);
}

/* Prevent broken flex alignment inside btn-group */
.btn-group .btn {
    display: inline-flex;
}

/* ============================================================================
   7. TABLES & FINANCIAL DATA PRESENTATION
   ============================================================================ */
.table-sipway {
    width: 100%;
    margin-bottom: 0;
    border-collapse: collapse;
}

.table > :not(caption) > * > * {
    padding: 0.55rem 0.75rem;
    font-size: 12.5px;
    border-bottom-color: var(--brand-border);
    vertical-align: middle;
}

.table-sipway td {
    padding: 0.55rem 0.75rem;
    font-size: 12.5px;
    border-bottom: 1px solid var(--brand-border);
    vertical-align: middle;
}

/* Unified Dark Black Table Headers with Crisp White Text & Red Bottom Accent */
.table:not(.table-borderless) > thead > tr > th,
.table-sipway > thead > tr > th {
    background-color: var(--brand-black) !important;
    color: var(--brand-white) !important;
    font-size: 11px !important;
    font-weight: 600 !important;
    text-transform: uppercase;
    letter-spacing: 0.045em;
    padding: 0.6rem 0.75rem !important;
    border-top: none !important;
    border-bottom: 2px solid var(--brand-red) !important;
    white-space: nowrap;
}

.table-hover > tbody > tr:hover > * {
    background-color: #FAFAFC;
    --bs-table-hover-bg: #FAFAFC;
}

.table-sipway tr:hover td {
    background-color: #FAFAFC;
}

.table tfoot > tr > td,
.table tfoot > tr > th {
    background-color: #F5F5F7;
    border-top: 2px solid var(--brand-black);
    font-weight: 700;
    font-size: 12.5px;
}

.table-danger-subtle,
tr.table-danger-subtle > td {
    background-color: var(--brand-red-subtle) !important;
}

/* Brand Color Alignment inside Content & Tables */
.text-primary {
    color: var(--brand-red) !important;
}

.bg-primary {
    background-color: var(--brand-red) !important;
}

.bg-primary-subtle {
    background-color: var(--brand-red-subtle) !important;
    color: var(--brand-red-dark) !important;
}

.border-primary-subtle {
    border-color: rgba(181, 18, 27, 0.25) !important;
}

.bg-warning-subtle {
    background-color: var(--brand-gold-light) !important;
    color: #78350F !important;
}

.border-warning-subtle {
    border-color: var(--brand-gold) !important;
}

/* ============================================================================
   8. BADGES, NAV TABS, PILLS, MODALS, ALERTS, DROPDOWNS & PAGINATION
   ============================================================================ */
.badge {
    font-size: 11px;
    font-weight: 600;
    padding: 0.28em 0.55em;
    border-radius: 4px;
    letter-spacing: 0.015em;
}

.badge-role {
    font-weight: 600;
    padding: 0.25em 0.55em;
    font-size: 11px;
    border-radius: 4px;
}

.badge-role-admin { background-color: var(--brand-red); color: var(--brand-white); }
.badge-role-management { background-color: var(--brand-black); color: var(--brand-gold-light); }
.badge-role-payment { background-color: var(--brand-success); color: var(--brand-white); }
.badge-role-lms { background-color: var(--brand-black-secondary); color: var(--brand-white); }
.badge-role-agent { background-color: var(--brand-gold); color: var(--brand-black); }
.badge-role-courier { background-color: #334155; color: var(--brand-white); }
.badge-role-operational { background-color: #4B5563; color: var(--brand-white); }
.badge-role-teacher { background-color: var(--brand-black); color: var(--brand-gold); }

/* Tabs & Pills */
.nav-tabs {
    border-bottom: 1px solid var(--brand-border);
    gap: 0.25rem;
}

.nav-tabs .nav-link {
    font-size: 13px;
    font-weight: 600;
    color: var(--brand-text-secondary);
    border: 1px solid transparent;
    border-top-left-radius: var(--radius-sm);
    border-top-right-radius: var(--radius-sm);
    padding: 0.5rem 0.9rem;
    transition: all 0.15s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--brand-black);
    border-color: transparent;
}

.nav-tabs .nav-link.active {
    color: var(--brand-red) !important;
    background-color: var(--brand-white);
    border-color: var(--brand-border) var(--brand-border) var(--brand-white);
    border-top: 2px solid var(--brand-red);
}

.nav-pills .nav-link {
    font-size: 12.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.85rem;
    color: var(--brand-black);
}

.nav-pills .nav-link.active {
    background-color: var(--brand-red) !important;
    color: var(--brand-white) !important;
}

/* List Group Active State (e.g., Config & Deductions Sidebar Lists) */
.list-group-item {
    font-size: 13px;
    border-color: var(--brand-border);
}

.list-group-item.active {
    background: linear-gradient(90deg, var(--brand-red) 0%, var(--brand-red-dark) 100%) !important;
    border-color: var(--brand-red) !important;
    border-left: 3px solid var(--brand-gold) !important;
    color: var(--brand-white) !important;
}

/* Modals */
.modal-content {
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--brand-border);
}

.modal-header.bg-danger,
.modal-header.bg-primary {
    background-color: var(--brand-black) !important;
    border-bottom: 2px solid var(--brand-red);
    color: var(--brand-white) !important;
}

.modal-header.bg-danger .btn-close,
.modal-header.bg-primary .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.modal-title {
    font-size: 15px;
    font-weight: 600;
}

.modal-body {
    font-size: 13px;
}

.modal-footer {
    padding: 0.7rem 1.25rem;
    border-top: 1px solid var(--brand-border);
    background-color: #FAFAFB !important;
}

/* Alerts */
.alert {
    font-size: 13px;
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    border: 1px solid var(--brand-border);
    border-left-width: 4px;
}

.alert-info {
    background-color: #F8FAFC;
    border-left-color: var(--brand-black);
    color: var(--brand-black);
}

.alert-warning {
    background-color: var(--brand-warning-subtle);
    border-left-color: var(--brand-gold);
    color: var(--brand-black);
}

.alert-danger {
    background-color: var(--brand-red-subtle);
    border-left-color: var(--brand-red);
    color: var(--brand-red-dark);
}

.alert-success {
    background-color: var(--brand-success-subtle);
    border-left-color: var(--brand-success);
    color: #14532D;
}

/* Dropdowns */
.dropdown-menu {
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 12.5px;
    padding: 0.35rem;
}

.dropdown-item {
    border-radius: 4px;
    padding: 0.42rem 0.75rem;
    font-weight: 500;
    color: var(--brand-black);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--brand-red-subtle);
    color: var(--brand-red);
}

.dropdown-item.active {
    background-color: var(--brand-red);
    color: var(--brand-white);
}

/* Pagination */
.pagination .page-link {
    font-size: 12px;
    font-weight: 500;
    color: var(--brand-black);
    border-color: var(--brand-border);
    padding: 0.35rem 0.65rem;
}

.pagination .page-item.active .page-link {
    background-color: var(--brand-red);
    border-color: var(--brand-red);
    color: var(--brand-white);
}

/* ============================================================================
   9. FOOTER
   ============================================================================ */
.app-footer {
    height: 46px;
    background-color: var(--brand-white);
    border-top: 1px solid var(--brand-border);
    font-size: 12px;
    color: var(--brand-text-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
}

/* ============================================================================
   10. RESPONSIVE ADAPTATIONS (Tablet & Mobile)
   ============================================================================ */
@media (min-width: 1200px) {
    .col-xl-custom-5 {
        flex: 0 0 20%;
        max-width: 20%;
    }
}

@media (max-width: 991.98px) {
    .app-sidebar {
        position: fixed;
        top: var(--topbar-height);
        bottom: 0;
        left: -260px;
        width: var(--sidebar-width) !important;
        z-index: 1040;
        height: calc(100vh - var(--topbar-height));
        max-height: calc(100vh - var(--topbar-height));
        overflow-y: auto;
        overflow-x: hidden;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
    }

    .app-sidebar.show {
        left: 0;
        box-shadow: 6px 0 24px rgba(0, 0, 0, 0.45);
    }

    .sidebar-backdrop {
        position: fixed;
        top: var(--topbar-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(23, 23, 23, 0.55);
        z-index: 1035;
        display: none;
    }

    .sidebar-backdrop.show {
        display: block;
    }

    .app-content {
        padding: 1rem;
    }
}

@media (max-width: 575.98px) {
    .app-content {
        padding: 0.75rem;
    }

    main h1, main .h1,
    main h2, main .h2,
    main h3, main .h3 {
        font-size: 18px;
    }

    .card-body {
        padding: 0.85rem !important;
    }

    .app-footer {
        height: auto;
        padding: 0.65rem 1rem;
        flex-direction: column;
        gap: 0.25rem;
        text-align: center;
    }
}