:root {
    --primary-color: #0d6efd;
    --primary-gradient: linear-gradient(135deg, #0d6efd 0%, #0dcaf0 100%);
    --bg-dark: #0b0e14;
    --bg-subtle: #161b22;
    --border-color: rgba(255, 255, 255, 0.1);
    --text-main: #f0f6fc;
    --text-secondary: #8b949e;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Sidebar Styling */
#sidebar-wrapper {
    min-height: 100vh;
    width: 280px;
    transition: margin 0.25s ease-out;
    background-color: var(--bg-subtle) !important;
}

#sidebar-wrapper .sidebar-heading {
    padding: 2rem 1.5rem;
    font-size: 1.25rem;
}

#sidebar-wrapper .list-group {
    width: 100%;
}

#sidebar-wrapper .list-group-item {
    color: var(--text-secondary);
    transition: all 0.2s ease;
    border: none !important;
    margin: 0.25rem 1rem;
    padding: 0.75rem 1rem;
}

#sidebar-wrapper .list-group-item:hover {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.05) !important;
}

#sidebar-wrapper .list-group-item.active {
    background-color: var(--primary-color) !important;
    color: white;
}

/* Page Content Styling */
#page-content-wrapper {
    min-width: 0;
    width: 100%;
    background-color: var(--bg-dark);
}

/* Custom Utilities */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tracking-wider {
    letter-spacing: 0.1em;
}

.min-vh-75 {
    min-height: 75vh;
}

/* App Sections */
.app-section {
    animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cards & Components */
.card {
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    border-color: var(--primary-color);
}

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

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

/* Range Input Customization */
.custom-range::-webkit-slider-runnable-track {
    background: rgba(255, 255, 255, 0.1);
    height: 8px;
    border-radius: 4px;
}

.custom-range::-webkit-slider-thumb {
    background: var(--primary-color);
    border: 3px solid #fff;
    width: 20px;
    height: 20px;
    margin-top: -6px;
    box-shadow: 0 0 10px rgba(13, 110, 253, 0.5);
}

/* Hover Effects */
.nav-link {
    cursor: pointer;
}

/* Stats */
.stat-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

/* Chart Styles */
.chart-container {
    position: relative;
    width: 100%;
    margin-top: 2rem;
}

/* Responsive */
@media (max-width: 991.98px) {
    #sidebar-wrapper {
        margin-left: -280px;
    }
    #wrapper.toggled #sidebar-wrapper {
        margin-left: 0;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-subtle);
    border-radius: 10px;
    border: 2px solid var(--bg-dark);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}