:root {
    --pf-navy: #1f1d2a;
    --pf-light-navy: #262835;
    --pf-lighter-navy: #2e303d;
    --pf-pink: #FA8072;
    --pf-slightly-dark-pink: #C8665B;
    --pf-platinum: #FFFFFF;
    --pf-primary-blue: #1D4ED8; /* Main Primary Action Color */
    --pf-secondary-purple: #9333EA;
    --pf-bg: #f4f6f9;
    --pf-text-main: #1f2937;
    --pf-text-muted: #6b7280;
    --pf-border-color: #e5e7eb;
}

body {
    background-color: var(--pf-bg);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--pf-text-main);
    line-height: 1.5;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 260px;
    background-color: var(--pf-navy);
    color: #fff;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s ease-in-out;
    z-index: 1040;
}

.sidebar-header {
    height: 70px;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    background-color: var(--pf-light-navy);
}

.logo-icon {
    color: var(--pf-pink);
    font-size: 1.5rem;
    margin-right: 0.75rem;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
    color: var(--pf-platinum);
}

.sidebar-nav {
    padding: 1.5rem 0;
    flex-grow: 1;
    overflow-y: auto;
}

/* Scoped Sidebar Links - FIXES TABS */
.sidebar-nav .nav-link {
    color: rgba(255,255,255,0.6) !important;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    border-bottom: none; /* Reset bootstrap defaults */
}

.sidebar-nav .nav-link:hover {
    color: #fff !important;
    background-color: rgba(255,255,255,0.03);
}

.sidebar-nav .nav-link.active {
    color: #fff !important;
    background-color: rgba(255,255,255,0.05);
    border-left-color: var(--pf-pink);
}

.sidebar-nav .nav-link i {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
    color: var(--pf-pink);
    opacity: 0.8;
}

.sidebar-nav .nav-link.active i {
    opacity: 1;
}

/* Standard Nav Tabs (Page Content) */
.nav-tabs {
    border-bottom: 1px solid var(--pf-border-color);
}

.nav-tabs .nav-link {
    color: var(--pf-text-muted);
    border: none;
    border-bottom: 2px solid transparent;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    background: transparent;
}

.nav-tabs .nav-link:hover {
    color: var(--pf-primary-blue);
    border-color: transparent;
    isolation: isolate;
}

.nav-tabs .nav-link.active {
    color: var(--pf-primary-blue);
    background: transparent;
    border-bottom: 2px solid var(--pf-primary-blue);
}

.sidebar-footer {
    padding: 1.5rem;
    background-color: var(--pf-light-navy);
    border-top: 1px solid rgba(255,255,255,0.05);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--pf-lighter-navy);
    color: var(--pf-pink);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.user-details small {
    color: rgba(255,255,255,0.5);
    display: block;
    line-height: 1;
    font-size: 0.75rem;
}

.user-details span {
    font-weight: 600;
    font-size: 0.9rem;
}

/* Main Content */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background-color: var(--pf-bg);
}

.top-header {
    background-color: #fff;
    height: 70px;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--pf-border-color);
    flex-shrink: 0;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--pf-text-main);
    margin: 0;
}

.content-body {
    padding: 2rem;
    overflow-y: auto;
    flex-grow: 1;
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    color: var(--pf-text-main);
    font-size: 1.5rem;
    padding: 0;
    margin-right: 1rem;
    cursor: pointer;
}

/* Responsive Layout */
@media (max-width: 992px) {
    .sidebar {
        position: fixed;
        height: 100%;
        transform: translateX(-100%);
        box-shadow: 4px 0 15px rgba(0,0,0,0.1);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .top-header {
        padding: 0 1.5rem;
        justify-content: flex-start;
    }
    
    .content-body {
        padding: 1rem;
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.5);
        z-index: 1030;
        display: none;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
}

/* Cards */
.card {
    background: #fff;
    border: 1px solid var(--pf-border-color);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    /* Subtle lift on hover for interactive cards */
    /* box-shadow: 0 4px 6px rgba(0,0,0,0.05); */
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--pf-border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    color: var(--pf-text-main);
}

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--pf-primary-blue);
    border-color: var(--pf-primary-blue);
}

.btn-primary:hover {
    background-color: #1e40af; /* Darker blue */
    border-color: #1e40af;
}

.btn-outline-primary {
    color: var(--pf-primary-blue);
    border-color: var(--pf-primary-blue);
}

.btn-outline-primary:hover {
    background-color: var(--pf-primary-blue);
    color: #fff;
}

.btn-outline-light {
    color: #fff;
    border-color: rgba(255,255,255,0.3);
}

.btn-outline-light:hover {
    background-color: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
    color: #fff;
}

/* Forms */
.form-control, .form-select {
    border-radius: 6px;
    border-color: var(--pf-border-color);
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--pf-primary-blue);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
}

.form-label {
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--pf-text-main);
}

/* Auth Pages */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f3f4f6;
    padding: 1rem;
}

.auth-card {
    background: #fff;
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    overflow: hidden;
}

.auth-card .card-header {
    background: var(--pf-navy);
    padding: 2rem;
    text-align: center;
    border-bottom: none;
}

.auth-card .card-header h3 {
    color: #fff;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.auth-card .card-header p {
    color: rgba(255,255,255,0.7);
    margin: 0;
    font-size: 0.9rem;
}

.auth-card .card-body {
    padding: 2rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    padding: 1rem 1.25rem;
}

/* Tables & Scrolling */
.table {
    margin-bottom: 0;
}

.table thead th {
    background-color: #f9fafb;
    color: var(--pf-text-muted);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--pf-border-color);
    border-top: none;
    white-space: nowrap;
    position: sticky; /* Sticky header */
    top: 0;
    z-index: 10;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--pf-border-color);
    color: var(--pf-text-main);
    font-size: 0.95rem;
}

.table-hover tbody tr:hover {
    background-color: #f9fafb;
}

/* Scrollable Table Container */
.table-responsive-scroll {
    max-height: 600px; /* Adjustable limit */
    overflow-y: auto;
    position: relative;
}

/* Modals */
.modal-content {
    border: none;
    border-radius: 12px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
    overflow: hidden;
}

.modal-header {
    background-color: var(--pf-navy);
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding: 1.25rem 1.5rem;
}

.modal-title {
    font-weight: 600;
    font-size: 1.1rem;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    background-color: #f9fafb;
    border-top: 1px solid var(--pf-border-color);
    padding: 1.25rem 1.5rem;
}

/* Helpers */
.fw-500 { font-weight: 500; }