:root {
    /* Color Palette - Green Theme */
    --primary-color: #28a745; /* Bootstrap Green */
    --primary-light: #34ce57;
    --primary-dark: #1e7e34;
    --secondary-color: #6c757d;
    --accent-color: #20c997; /* Teal accent */
    --background-color: #f8f9fa; /* Light gray */
    --surface-color: #FFFFFF;
    --text-primary: #000000; /* Pure black */
    --text-secondary: #333333; /* Dark gray */
    --border-color: #dee2e6;
    
    /* Function Colors */
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-hover: 0 12px 24px rgba(0,0,0,0.18);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* Reset & Base */
body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background-color: var(--background-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-primary);
}

a {
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--text-primary);
}

/* Utilities */
.card-modern {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-modern {
    border-radius: var(--radius-full);
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary-modern {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 6px rgba(40, 167, 69, 0.25);
}

.btn-primary-modern:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    box-shadow: 0 6px 12px rgba(40, 167, 69, 0.35);
    color: white;
}

.btn-secondary-modern {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary-modern:hover {
    background: var(--background-color);
    border-color: var(--text-secondary);
}

/* Form Elements */
.form-control-modern {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--surface-color);
    color: var(--text-primary);
}

.form-control-modern:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15);
    outline: none;
}

/* Layout Overrides */
.sidebar {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
    border-right: 1px solid rgba(0,0,0,0.1);
    box-shadow: var(--shadow-md) !important;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.9) !important;
    border-radius: var(--radius-md);
    margin: 0 10px;
    padding: 10px 15px;
    transition: all 0.2s;
}

.sidebar .nav-link:hover, .sidebar .nav-link.active {
    background-color: rgba(255, 255, 255, 0.25) !important;
    color: white !important;
    font-weight: 600;
}

.sidebar .nav-link i {
    width: 24px;
    text-align: center;
    margin-right: 10px;
}

/* Content Area */
.main-content {
    background-color: var(--background-color);
}

/* Tables */
.table {
    color: var(--text-primary);
}

.table thead th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.table tbody td {
    color: var(--text-primary);
}

/* Badges */
.badge-primary {
    background-color: var(--primary-color);
    color: white;
}

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

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

/* PWA Splash/Install Helpers */
.pwa-install-prompt {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--surface-color);
    padding: 1rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 9999;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.pwa-install-prompt.show {
    transform: translateX(-50%) translateY(0);
}

/* Bootstrap overrides for green theme */
.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: white !important;
}

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

.btn-success {
    background-color: var(--success-color) !important;
    border-color: var(--success-color) !important;
}

/* All text elements should be black */
p, span, div, label, input, select, textarea {
    color: var(--text-primary);
}

/* Responsive text sizing */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    
    .btn {
        min-width: 44px;
        min-height: 44px;
    }
}