:root {
    --indigo-50: #eef2ff;
    --indigo-100: #e0e7ff;
    --indigo-200: #c7d2fe;
    --indigo-500: #6366f1;
    --indigo-600: #4f46e5;
    --indigo-700: #4338ca;
    --indigo-800: #3730a3;
    --indigo-900: #312e81;
    
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    --primary-gradient: linear-gradient(135deg, var(--indigo-500) 0%, var(--indigo-700) 100%);
    --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.3);
    --card-shadow: 0 4px 20px -2px rgba(99, 102, 241, 0.1), 0 2px 10px -2px rgba(0, 0, 0, 0.05);
    --hover-shadow: 0 20px 40px -10px rgba(99, 102, 241, 0.2);
}

body {
    overflow-x: hidden;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--slate-50);
    color: var(--slate-800);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--slate-900);
}

/* Layout */
#sidebar-wrapper {
    min-height: 100vh;
    width: 280px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    background: #ffffff !important;
    border-right: 1px solid var(--indigo-100);
    box-shadow: 10px 0 30px rgba(99, 102, 241, 0.03);
}

#page-content-wrapper {
    background-color: var(--slate-50);
}

.main-content {
    min-height: calc(100vh - 70px);
    padding: 2rem !important;
}

/* Sidebar Styling */
.sidebar-heading {
    color: var(--indigo-500) !important;
    font-weight: 800 !important;
    letter-spacing: 1.5px;
    padding: 1.5rem 1.5rem 0.5rem !important;
}

.list-group-item {
    background: transparent !important;
    color: var(--slate-800) !important;
    border: none !important;
    margin: 4px 12px;
    padding: 0.8rem 1rem !important;
    border-radius: 12px !important;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.list-group-item i {
    width: 24px;
    text-align: center;
    margin-right: 12px;
    font-size: 1.1rem;
    color: var(--indigo-500);
    opacity: 0.8;
}

.list-group-item:hover {
    background: var(--indigo-50) !important;
    color: var(--indigo-700) !important;
    transform: translateX(5px);
}

.list-group-item.active {
    background: var(--primary-gradient) !important;
    color: #ffffff !important;
    box-shadow: 0 8px 15px -4px rgba(99, 102, 241, 0.4) !important;
}

.list-group-item.active i {
    color: #ffffff !important;
    opacity: 1;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.8) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--indigo-50) !important;
}

/* Cards */
.card {
    border: 1px solid var(--glass-border) !important;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: var(--card-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.card-title {
    color: var(--indigo-900);
    font-weight: 800;
}

/* Dashboard Stats */
.stat-card {
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--slate-900);
    line-height: 1.2;
}

.stat-label {
    color: var(--slate-800);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Buttons */
.btn {
    border-radius: 12px;
    padding: 0.6rem 1.5rem;
    font-weight: 700;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary { background: var(--primary-gradient) !important; box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3); }
.btn-success { background: var(--success-gradient) !important; box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3); }
.btn-danger { background: var(--danger-gradient) !important; box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3); }

.btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12) !important;
}

/* Tables */
.table-container {
    background: #ffffff;
    border-radius: 20px;
    padding: 1rem;
    box-shadow: var(--card-shadow);
}

.table thead th {
    background-color: var(--indigo-50) !important;
    color: var(--indigo-900);
    font-weight: 800;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1px;
    padding: 1.25rem 1rem;
    border: none !important;
}

.table tbody td {
    padding: 1.25rem 1rem;
    vertical-align: middle;
    color: var(--slate-800);
    border-bottom: 1px solid var(--slate-100);
    font-size: 0.9rem;
}

.table tr:hover td {
    background-color: var(--slate-50);
}

/* Forms */
.form-control, .form-select {
    border-radius: 12px;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--slate-200);
    background-color: #ffffff;
    transition: all 0.2s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--indigo-500);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-label {
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--slate-50);
}
::-webkit-scrollbar-thumb {
    background: var(--indigo-200);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--indigo-500);
}

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

.animate-fade {
    animation: fadeIn 0.4s ease-out forwards;
}