:root {
    --primary-blue: #004AAD;
    --secondary-blue: #0A66C2;
    --off-white: #F8F9FA;
    --dark-text: #2C3E50;
    --light-text: #6C757D;
    --success: #28A745;
    --danger: #DC3545;
    --card-shadow: 0 10px 30px rgba(0, 74, 173, 0.05);
    --border-radius: 12px;
    --glass: rgba(255, 255, 255, 0.7);
    --border-glass: rgba(255, 255, 255, 0.4);
}

body {
    background-color: var(--off-white);
    color: var(--dark-text);
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
}

/* Sidebar Styling */
.sidebar {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    width: 260px;
    position: fixed;
    top: 0;
    left: 0;
    background: #FFFFFF;
    border-right: 1px solid rgba(0, 0, 0, 0.05);
    padding: 20px;
    z-index: 1000;
}

.logo-container {
    padding: 20px 10px;
    text-align: center;
    margin-bottom: 20px;
}

.logo-container img {
    max-width: 140px;
    height: auto;
}

.nav-link {
    color: var(--light-text);
    padding: 12px 15px;
    margin: 5px 0;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link i {
    margin-right: 12px;
    font-size: 1.1rem;
}

.nav-link:hover, .nav-link.active {
    background: rgba(0, 74, 173, 0.08);
    color: var(--primary-blue);
}

/* Content Area */
.main-content {
    margin-left: 260px;
    padding: 40px;
    transition: margin-left 0.3s ease;
}

/* Auth Pages (Login) */
.auth-body {
    background: var(--off-white);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-layout {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
}

.login-card {
    border-radius: 24px !important;
    overflow: hidden;
    border: none !important;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

/* Premium Cards */
.card {
    background: #FFFFFF;
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

/* Tech Cards */
.card-tech {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    position: relative;
    overflow: hidden;
}

.card-tech::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
}

.stat-value {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--light-text);
    letter-spacing: 1.5px;
}

.icon-box-tech {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(0, 74, 173, 0.1);
    color: var(--primary-blue);
    font-size: 1.5rem;
}

.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 20px;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-blue);
    border: none;
    padding: 10px 25px;
    border-radius: 8px;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--secondary-blue);
    transform: scale(1.02);
}

/* Table Styling */
.table {
    border-collapse: separate;
    border-spacing: 0 10px;
}

.table thead th {
    border: none;
    color: var(--light-text);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.table tbody tr {
    background: #FFFFFF;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    border-radius: 10px;
}

.table tbody td {
    padding: 15px;
    vertical-align: middle;
}

/* Charts */
.chart-container {
    padding: 20px;
}

/* Mobile Header & Overlay */
.mobile-header {
    background: #FFFFFF;
    padding: 10px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1040;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    z-index: 1045;
    backdrop-filter: blur(2px);
    transition: opacity 0.3s ease;
    opacity: 0;
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

/* Responsive Overrides */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1050;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 15px;
        padding-top: 80px; /* Space for mobile header */
    }
    
    .card-tech .stat-value {
        font-size: 1.8rem;
    }
    
    .auth-body {
        padding: 15px;
    }
}


/* Scrollbar */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: #cfd8dc; border-radius: 4px; }