:root {
    --bg-main: #f4f6f8;
    --bg-panel: #ffffff;
    --bg-card: #ffffff;
    --bg-modal: #ffffff;
    --bg-input: #f8f9fa;
    --text-light: #2c3e50;
    --text-muted: #7f8c8d;
    --primary: #3498db;
    --secondary: #95a5a6;
    --border-main: #e0e6ed;
    --success: #2ecc71;
    --danger: #e74c3c;
    --warning: #f1c40f;
}

.btn, .sidebar-toggle-btn { color: #ffffff !important; }

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

.btn-primary:hover {
    background-color: #1e8449 !important;
    border-color: #1e8449 !important;
    color: #ffffff !important;
}

.btn-primary:active {
    filter: brightness(0.9);
}