:root {
    --primary-color: #22C55E;
    --primary-hover: #16A34A;
    --secondary-color: #0284C7;
    --navy-dark: #1E293B;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --sidebar-width: 260px;
    --topbar-height: 65px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #F8FAFC;
    color: var(--navy-dark);
    min-height: 100vh;
}

.navbar {
    height: var(--topbar-height);
    z-index: 1000;
    border-bottom: 1px solid #E2E8F0;
}

.wrapper {
    display: flex;
    margin-top: var(--topbar-height);
    min-height: calc(100vh - var(--topbar-height));
}

.sidebar {
    width: var(--sidebar-width);
    background: white;
    box-shadow: 2px 0 10px rgba(0,0,0,0.04);
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    bottom: 0;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 999;
    border-right: 1px solid #E2E8F0;
}

.sidebar.collapsed {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-content {
    padding: 20px 0;
}

.sidebar .nav-link {
    padding: 12px 25px;
    color: #64748b;
    border-left: 3px solid transparent;
    transition: all 0.3s;
    font-weight: 500;
}

.sidebar .nav-link:hover {
    background: #f0fdf4;
    color: var(--primary-hover);
}

.sidebar .nav-link.active {
    background: #dcfce7;
    color: var(--primary-hover);
    border-left-color: var(--primary-hover);
    font-weight: 600;
}

.sidebar .nav-link i {
    width: 20px;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 30px;
    transition: all 0.3s;
}

.sidebar.collapsed ~ .main-content {
    margin-left: 0;
}

.avatar-circle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 14px;
}

.white-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    border: 1px solid #E2E8F0;
}

.gradient-card {
    border-radius: 16px;
    padding: 24px;
    color: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.gradient-card-1 {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
}

.gradient-card-2 {
    background: linear-gradient(135deg, #0284C7 0%, #1D4ED8 100%);
}

.gradient-card-3 {
    background: linear-gradient(135deg, #8B5CF6 0%, #6D28D9 100%);
}

.gradient-card-4 {
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
}

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

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

@media (max-width: 991.98px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    
    .sidebar.show {
        margin-left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
}